HomeMy Public PortalAboutLTC 084-2017 Scheduled Miami-Dade County Preventative Truck Spraying for MosquitosBAL HARBOUR
- VILLAGE -
OFFICE OF THE VILLAGE MANAGER
LETTER TO COUNCIL
NO. 084-2017
To: Mayor Gabriel Groisman and Members of the Village Council
From: Jorge M. Gonzalez, Village Manager
Date: April 28, 2017 I
Subject: Scheduled Miami -Dade County Preventative Truck Spraying for Mosquitos
The purpose of this Letter to Council (LTC) is to transmit to you notice of the upcoming
Miami -Dade County preventative truck spraying with an environmentally safe organic
bacterial larvicide. In the continuing effort to control the mosquito population, the Miami -
Dade County Mosquito Control Division has notified Bal Harbour Village that they will be
resuming bi-weekly truck spraying of the Village starting in the early morning of
Wednesday, May 3, 2017 from 1:00 am to 2:00 am.
While we have not received notification of any specific threat for the Village, the spraying
is a proactive preventive measure recommended by Mosquito Control. The chemical used
for this spray application is an environmentally safe organic bacterial larvicide. The
larvicide (VectoBac WG) interrupts the development of mosquito larvae, thus controlling
the mosquito population. A fact sheet for this chemical is attached to this LTC.
Additionally, staff from the Village's Parks and Public Spaces and Code Compliance
Departments are continuing to inspect the entire Village to ensure that there are no areas
which contain long-standing ponding water. In the event that there is observed standing
water in any of the public right-of-ways, the appropriate measures to remove or disburse
the water and/or utilizing environmentally -friendly products to prevent the breeding of
mosquitos in those areas will be completed.
Notification to our residents will be transmitted via the Village WENS and through the e-
mail blast system. Additionally, further Zika information is available on the Bal Harbour
Village main webpage and the Miami -Dade County website by following the links below:
http://www.balharbourgov.gov/home
http://www.miamidade.gov/mosquito/index.html
If you have, any questions please contact Director of Parks and Open Spaces John
Oldenburg at 305.993.7368.
JMG/JAO
TECHNICAL USE SHEET
VectoBac® WG
Bacterial Larvicide
TECHNICAL USE SHEET
VectoBac® WG
Bacterial Larvicide
VectoBac® WG Biological Larvicide is available in the following package sizes:
• USA only
– 1 lb (0.45 kg) HDPE plastic canisters, packaged 24 per case
– 25 lb (11.3 kg) drums
• International only
– 0.5 kg HDPE plastic canisters, packaged 24 per case
– 25 kg drums
Check with your local distributor or Valent BioSciences technical
representative to see what packaging is available in your area.
GROUND (VEHICLE-MOUNTED SPRAYING)
Tests are currently being conducted by mosquito control professionals globally on how to best apply
VectoBac WG through truck-mounted spray equipment. Several tests are showing promise, and
results are expected in the near future. Several factors make larviciding for container mosquitoes
different from standard ULV adulticiding. The objective of ULV adulticiding is to release an airborne
cloud of very small droplets of insecticide that will impinge upon fl ying mosquitoes and deliver a
toxic dose to the insect by contact. When spraying microbial larvicides for container mosquito
control, the objective is to disperse droplets of larvicide across a targeted area that will then fall into
containers and deliver a suffi cient dose to kill mosquito larvae that are fi lter feeding in the water.
Selection of spray equipment to achieve appropriate droplet spectra for specifi c environmental
conditions is a complex matter. Density of structures and vegetation in the targeted area as well as
atmospheric conditions need to be considered. Please contact your local Valent BioSciences
technical specialist for additional assistance regarding this approach.
AERIAL
In 2011, the Florida Keys Mosquito and Vector Control District (U.S.) implemented the world’s fi rst
aerial larviciding program to control dengue vectors on a large scale. In 2010, the district developed
the method in cooperation with Valent BioSciences Corporation and Helicopter Applicators Inc. in
response to an ongoing dengue outbreak. The method has been optimized with support of REMSpC
Spray Consulting. Applications are made using six Micronair® AU5000 rotary atomizers operating at
4,000–5,000 rpm on a Bell 206B helicopter. Treatments are made with a spray volume of 0.5
gallons per acre and a Vectobac WG dose of 0.5 lbs/acre. Two hundred-foot swaths are employed at
an altitude of 100 feet and an airspeed of 80 mph. Offset spraying is employed during missions
based on wind conditions and the AGDISP model applied by REMSpC. Early in 2011, the district
began employing this method in conjunction with intensive ground efforts to control Aedes aegypti
in Key West. Subsequent research by the district has shown adult population suppression is
occurring as a result of the treatments, and Aedes aegypti populations are declining in Key West.
Please contact your local Valent BioSciences technical specialist for additional assistance regarding
this approach.
These types of applications for control of container Aedes are highly specialized. For ground (truck)
applications, this approach has only just recently been implemented operationally in Southeast
Asia, with the U.S. and Europe currently in the development phase.
VectoBac® WG (also known as WDG) Biological Larvicide is a water-dispersible
granule formulation of Bacillus thuringiensis subsp. israelensis strain AM65-52
for control of mosquito larvae. The product has a potency of 3,000 International
Toxin Units (ITU) per milligram against Aedes aegypti larvae. It is designed for
use in aqueous spray mixes and for direct application to water containers.
VectoBac WG was the fi rst bacterial larvicide to complete the World Health
Organization Pesticide Evaluation Scheme.
Consisting of only Bti strain AM65-52 and food-grade (U.S. EPA list 4) inert ingredients, VectoBac
WG has received approval for application in organic crops (U.S.: Organic Materials Review Institute
[OMRI] and National Organic Program [NOP] certifi ed) and sensitive habitats in various countries
around the world. This versatile formulation allows a variety of application modes and uses for
mosquito control.
Container species such as Aedes aegypti and Aedes albopictus are a major source of concern for
mosquito abatement agencies across the globe due to their high vectorial capacity. In addition,
adulticiding these species can be quite diffi cult because of their preference for host seeking and
oviposition in the daytime. Various application methods of VectoBac WG complement integrated
vector management (IVM) programs that are aimed at reducing these species that have the
capacity to transmit dengue, chikungunya, and yellow fever, as well as other arboviruses.
BACTER IAL LAR VICIDE
Vec toBac® WG
WATER DISP ERSIBLE GR A NULE
For Organic Production
FEATURES
• Bacterial larvicide
• Highly specifi c activity on mosquitoes
• Water-dispersible granule
• High-potency dry formulation
• Mixes easily in water
• First bacterial larvicide to complete the
WHO Pesticide Evaluation Scheme
• Effective in direct application for residual
control of container mosquitoes
• Effective in ground and aerial spray
application as aerosol or mist droplets for
wide-area control of container mosquitoes
• Quickly kills mosquito larvae (2–24 hours)
BENEFITS
• Not harmful to non-target organism
populations
• Aqueous spray or direct application
• ncreased shelf life
• Decreased weight to transport
• Sprays easily through many equipment types
• Consistent, quality product that aligns
with international health standards for
public health
• Application fl exibility for effectively managing
dengue and chikungunya disease vectors
• Results visible quickly in fi eld
Packaging
Container Mosquito Applications — Wide Area Spray (Ground Vehicle and Aircraft)
Water-DispersibleGranule
141737VBC_VectoBac_WG_TechUseSheet_WaterDispersibleGranule_6-Panel.indd 1-3 3/9/15 6:40 PM
Ground aqueous spray mix applications should be targeted to natural and artificial larval habitats
which are < 50 L (13.2 gallons) in volume capacity that are spread over a wide area such as
covered and uncovered concrete drainage systems, trash accumulations, tires, roof gutters, and
vegetation—leaf axils, tree holes, leaf litter, and ground pools. The recommended dosage in a
spray mix is 250–500 g of VectoBac WG per hectare of target larval habitats. Large-scale studies in
Asia Pacific have shown that optimal results for dengue vector control are observed with 400–500
g of VectoBac WG per hectare in a spray mix.
Motorized backpack sprayers are an effective tool for rapid coverage of small containers in an
urban environment. However, calibration for these treatments is different from the approach used
to target open standing water habitats. Conventional applications are made on a grid pattern. In
conventional treatments, spray volume per unit area is easily calculated based on travel speed,
flow rate and swath width. When spraying to target known and suspected accumulations of
containers in urban and suburban areas, this approach may not be suitable due to clustered
microhabitats and non-linear access to the target areas. One way to calculate the required volume
prior to application is to conduct a “dress rehearsal” first with only water in the spray tank. Moving
through typical target areas at a comfortable pace and spraying all likely container sources with
water will provide a fairly accurate estimate of spray volume required. Product concentration in the
spray mix can then be determined based on the size of the area and volume used. Tests
conducted with motorized backpack blowers using VectoBac WG show that a droplet size in the
80–120 micron range produces the most effective swath in terms of distance while still being likely
to fall into containers.
For general mosquito control, VectoBac WG can be applied as an aqueous spray using
conventional ground and aerial application equipment to habitats with sparse or no vegetation.
Rate selected should be based on habitat, larval population/stage, and/or environmental
conditions.
For effective mosquito control an application rate range of 1.75–7.0 oz/acre (50–200 g/acre;
125–500 g/hectare) is required.
Polluted water (such as sewage lagoons and animal waste lagoons) requires an application rate
range of 7.0–14.0 oz/acre (200–400 g/acre; 0.5–1.0 kg/hectare). Use higher rate range in polluted
water and when late 3rd and early 4th instar larvae predominate, mosquito populations are high, or
algae is abundant.
Gradually add the desired quantity of VectoBac WG to half the final intended volume of water in a
mix tank while under agitation, then add additional water to produce the final spray volume. The
concentration of the final spray mix will depend on weather, spray equipment, and mosquito habitat
characteristics. Start the mechanical or manual agitation to provide moderate circulation of water
before adding the VectoBac WG. Backpack and compressed air sprayers may be agitated by
shaking after adding VectoBac WG to the water in the sprayer. VectoBac WG suspends readily in
water and will stay suspended over normal application periods. Brief recirculation may be necessary
if the spray mixture has sat for several hours or longer. Do not mix more VectoBac WG than can be
used in a 48-hour period.
Rapid mixing of highly concentrated suspensions for aerial application targeting container
mosquitoes may require the use of a venturi inductor system. Consult your Valent BioSciences
Corporation representative regarding sources for this equipment.
AVOID CONTINUOUS AGITATION OF THE SPRAY MIXTURE DURING SPRAYING. For ground
spraying, apply 1.75–14 oz/acre (50–400 g/acre; 123–988 g/ha) of VectoBac WG in 1–100 gallons
of water per acre (10–950 liters/ha) using hand-pump, air blast, mist blower, or other spray
equipment. For aerial application, apply 1.75–14 oz/acre (50-400 g/acre; 123–988 g/ha) of
VectoBac WG in 0.25–10 gallons of water per acre (2.4–93.5 liters/ha) through fixed wing or
helicopter aircraft equipped with either conventional boom and nozzle system or rotary atomizers to
provide uniform coverage of the target area.
Container Mosquito Applications — Wide Area Spray (Backpack)Container Mosquito Applications — Direct PlacementGeneral
Application Rates
General
Mixing Instructions
Direct (undiluted) applications of VectoBac WG are used to treat water containers in many countries
around the globe. Direct application is best suited for treatment of easily located containers with a
volume > 50 liters (13.2 gallons), but can be used for smaller containers as well. This approach has
delivered extended residual control for up to three months in a variety of container types. Examples
of these containers include potable water reservoirs such as earthen or cement jars, plastic or metal
drums, and fiberglass or cement tanks. Application rates of 2–8 g per 1000 liters (264 gallons) of
container capacity (100–400 mg/50 L) should be used depending on habitat conditions and
program objectives. Application may be made with a calibrated scoop or spoon. Monitor for efficacy
and residual control by counting numbers of late instar and pupae in treated containers before and
after treatment. Initial late instar/pupae reductions should be seen in 72 hours. Re-treatment
interval should be based on program objectives. Consult Valent BioSciences for additional technical
assistance regarding this approach.
Larval Habitat
Water reservoirs ≥ 50L in volume capacity
Container type:
• Cement, earthen, plastic, metal, fiberglass
VectoBac WG Application Method*
Direct application into containers
2–8g / 1,000 L
Application Equipment
Calibrated scoop/spoon
1 teaspoon/200 L (dose ~ 8g/1,000L)
* Consult your VBC technical specialist to determine optimal application methods to meet your program objectives.
Recommended Dilution Rates for VectoBac® WG per Hectare
Larval Habitat
Covered concrete drains
Uncovered concrete drains, roof gutters,
sparse vegetation, containers, tires, etc.
Trash, dense vegetation, leaf litter, etc.
Wide open areas of larval habitat
VectoBac WG Application Method
150–200 L (high volume application)
30–60 L (moderate volume application)
15–30 L (low volume application)
7–10 L (ultra-low volume application)
Application Equipment
Motorized backpack or shoulder-carried blowers
Motorized backpack or shoulder-carried blowers
Motorized backpack or shoulder-carried blowers
Vehicle-mounted ULV sprayers
Larval Habitat
Water reservoirs ≤ 50 L in volume capacity
Container type:
• Cement, earthen, plastic, metal, fiberglass
• Concrete drainage system
• Covered and uncovered drains
• Roof gutters
• Trash
• Tires
• Vegetation – leaf axils, tree holes, leaf litter
• Natural pools with leaf litter
VectoBac WG Application Method*
Ground spray
250–500 g/ha (1 ha = 10,000 m2)
* Consult your VBC technical specialist to determine optimal application methods to meet your program objectives.
Application Equipment
Ground spray equipment
• Vehicle-mounted sprayers
• Motorized backpack or
shoulder-carried blowers
• Hand-carried pump sprayers
Water-Dispersible Granule
141737VBC_VectoBac_WG_TechUseSheet_WaterDispersibleGranule_6-Panel.indd 4-6 3/9/15 6:40 PM
Ground aqueous spray mix applications should be targeted to natural and artificial larval habitats
which are < 50 L (13.2 gallons) in volume capacity that are spread over a wide area such as
covered and uncovered concrete drainage systems, trash accumulations, tires, roof gutters, and
vegetation—leaf axils, tree holes, leaf litter, and ground pools. The recommended dosage in a
spray mix is 250–500 g of VectoBac WG per hectare of target larval habitats. Large-scale studies in
Asia Pacific have shown that optimal results for dengue vector control are observed with 400–500
g of VectoBac WG per hectare in a spray mix.
Motorized backpack sprayers are an effective tool for rapid coverage of small containers in an
urban environment. However, calibration for these treatments is different from the approach used
to target open standing water habitats. Conventional applications are made on a grid pattern. In
conventional treatments, spray volume per unit area is easily calculated based on travel speed,
flow rate and swath width. When spraying to target known and suspected accumulations of
containers in urban and suburban areas, this approach may not be suitable due to clustered
microhabitats and non-linear access to the target areas. One way to calculate the required volume
prior to application is to conduct a “dress rehearsal” first with only water in the spray tank. Moving
through typical target areas at a comfortable pace and spraying all likely container sources with
water will provide a fairly accurate estimate of spray volume required. Product concentration in the
spray mix can then be determined based on the size of the area and volume used. Tests
conducted with motorized backpack blowers using VectoBac WG show that a droplet size in the
80–120 micron range produces the most effective swath in terms of distance while still being likely
to fall into containers.
For general mosquito control, VectoBac WG can be applied as an aqueous spray using
conventional ground and aerial application equipment to habitats with sparse or no vegetation.
Rate selected should be based on habitat, larval population/stage, and/or environmental
conditions.
For effective mosquito control an application rate range of 1.75–7.0 oz/acre (50–200 g/acre;
125–500 g/hectare) is required.
Polluted water (such as sewage lagoons and animal waste lagoons) requires an application rate
range of 7.0–14.0 oz/acre (200–400 g/acre; 0.5–1.0 kg/hectare). Use higher rate range in polluted
water and when late 3rd and early 4th instar larvae predominate, mosquito populations are high, or
algae is abundant.
Gradually add the desired quantity of VectoBac WG to half the final intended volume of water in a
mix tank while under agitation, then add additional water to produce the final spray volume. The
concentration of the final spray mix will depend on weather, spray equipment, and mosquito habitat
characteristics. Start the mechanical or manual agitation to provide moderate circulation of water
before adding the VectoBac WG. Backpack and compressed air sprayers may be agitated by
shaking after adding VectoBac WG to the water in the sprayer. VectoBac WG suspends readily in
water and will stay suspended over normal application periods. Brief recirculation may be necessary
if the spray mixture has sat for several hours or longer. Do not mix more VectoBac WG than can be
used in a 48-hour period.
Rapid mixing of highly concentrated suspensions for aerial application targeting container
mosquitoes may require the use of a venturi inductor system. Consult your Valent BioSciences
Corporation representative regarding sources for this equipment.
AVOID CONTINUOUS AGITATION OF THE SPRAY MIXTURE DURING SPRAYING. For ground
spraying, apply 1.75–14 oz/acre (50–400 g/acre; 123–988 g/ha) of VectoBac WG in 1–100 gallons
of water per acre (10–950 liters/ha) using hand-pump, air blast, mist blower, or other spray
equipment. For aerial application, apply 1.75–14 oz/acre (50-400 g/acre; 123–988 g/ha) of
VectoBac WG in 0.25–10 gallons of water per acre (2.4–93.5 liters/ha) through fixed wing or
helicopter aircraft equipped with either conventional boom and nozzle system or rotary atomizers to
provide uniform coverage of the target area.
Container Mosquito Applications — Wide Area Spray (Backpack)Container Mosquito Applications — Direct PlacementGeneral
Application Rates
General
Mixing Instructions
Direct (undiluted) applications of VectoBac WG are used to treat water containers in many countries
around the globe. Direct application is best suited for treatment of easily located containers with a
volume > 50 liters (13.2 gallons), but can be used for smaller containers as well. This approach has
delivered extended residual control for up to three months in a variety of container types. Examples
of these containers include potable water reservoirs such as earthen or cement jars, plastic or metal
drums, and fiberglass or cement tanks. Application rates of 2–8 g per 1000 liters (264 gallons) of
container capacity (100–400 mg/50 L) should be used depending on habitat conditions and
program objectives. Application may be made with a calibrated scoop or spoon. Monitor for efficacy
and residual control by counting numbers of late instar and pupae in treated containers before and
after treatment. Initial late instar/pupae reductions should be seen in 72 hours. Re-treatment
interval should be based on program objectives. Consult Valent BioSciences for additional technical
assistance regarding this approach.
Larval Habitat
Water reservoirs ≥ 50L in volume capacity
Container type:
• Cement, earthen, plastic, metal, fiberglass
VectoBac WG Application Method*
Direct application into containers
2–8g / 1,000 L
Application Equipment
Calibrated scoop/spoon
1 teaspoon/200 L (dose ~ 8g/1,000L)
* Consult your VBC technical specialist to determine optimal application methods to meet your program objectives.
Recommended Dilution Rates for VectoBac® WG per Hectare
Larval Habitat
Covered concrete drains
Uncovered concrete drains, roof gutters,
sparse vegetation, containers, tires, etc.
Trash, dense vegetation, leaf litter, etc.
Wide open areas of larval habitat
VectoBac WG Application Method
150–200 L (high volume application)
30–60 L (moderate volume application)
15–30 L (low volume application)
7–10 L (ultra-low volume application)
Application Equipment
Motorized backpack or shoulder-carried blowers
Motorized backpack or shoulder-carried blowers
Motorized backpack or shoulder-carried blowers
Vehicle-mounted ULV sprayers
Larval Habitat
Water reservoirs ≤ 50 L in volume capacity
Container type:
• Cement, earthen, plastic, metal, fiberglass
• Concrete drainage system
• Covered and uncovered drains
• Roof gutters
• Trash
• Tires
• Vegetation – leaf axils, tree holes, leaf litter
• Natural pools with leaf litter
VectoBac WG Application Method*
Ground spray
250–500 g/ha (1 ha = 10,000 m2)
* Consult your VBC technical specialist to determine optimal application methods to meet your program objectives.
Application Equipment
Ground spray equipment
• Vehicle-mounted sprayers
• Motorized backpack or
shoulder-carried blowers
• Hand-carried pump sprayers
Water-Dispersible Granule
141737VBC_VectoBac_WG_TechUseSheet_WaterDispersibleGranule_6-Panel.indd 4-6 3/9/15 6:40 PM
Ground aqueous spray mix applications should be targeted to natural and artificial larval habitats
which are < 50 L (13.2 gallons) in volume capacity that are spread over a wide area such as
covered and uncovered concrete drainage systems, trash accumulations, tires, roof gutters, and
vegetation—leaf axils, tree holes, leaf litter, and ground pools. The recommended dosage in a
spray mix is 250–500 g of VectoBac WG per hectare of target larval habitats. Large-scale studies in
Asia Pacific have shown that optimal results for dengue vector control are observed with 400–500
g of VectoBac WG per hectare in a spray mix.
Motorized backpack sprayers are an effective tool for rapid coverage of small containers in an
urban environment. However, calibration for these treatments is different from the approach used
to target open standing water habitats. Conventional applications are made on a grid pattern. In
conventional treatments, spray volume per unit area is easily calculated based on travel speed,
flow rate and swath width. When spraying to target known and suspected accumulations of
containers in urban and suburban areas, this approach may not be suitable due to clustered
microhabitats and non-linear access to the target areas. One way to calculate the required volume
prior to application is to conduct a “dress rehearsal” first with only water in the spray tank. Moving
through typical target areas at a comfortable pace and spraying all likely container sources with
water will provide a fairly accurate estimate of spray volume required. Product concentration in the
spray mix can then be determined based on the size of the area and volume used. Tests
conducted with motorized backpack blowers using VectoBac WG show that a droplet size in the
80–120 micron range produces the most effective swath in terms of distance while still being likely
to fall into containers.
For general mosquito control, VectoBac WG can be applied as an aqueous spray using
conventional ground and aerial application equipment to habitats with sparse or no vegetation.
Rate selected should be based on habitat, larval population/stage, and/or environmental
conditions.
For effective mosquito control an application rate range of 1.75–7.0 oz/acre (50–200 g/acre;
125–500 g/hectare) is required.
Polluted water (such as sewage lagoons and animal waste lagoons) requires an application rate
range of 7.0–14.0 oz/acre (200–400 g/acre; 0.5–1.0 kg/hectare). Use higher rate range in polluted
water and when late 3rd and early 4th instar larvae predominate, mosquito populations are high, or
algae is abundant.
Gradually add the desired quantity of VectoBac WG to half the final intended volume of water in a
mix tank while under agitation, then add additional water to produce the final spray volume. The
concentration of the final spray mix will depend on weather, spray equipment, and mosquito habitat
characteristics. Start the mechanical or manual agitation to provide moderate circulation of water
before adding the VectoBac WG. Backpack and compressed air sprayers may be agitated by
shaking after adding VectoBac WG to the water in the sprayer. VectoBac WG suspends readily in
water and will stay suspended over normal application periods. Brief recirculation may be necessary
if the spray mixture has sat for several hours or longer. Do not mix more VectoBac WG than can be
used in a 48-hour period.
Rapid mixing of highly concentrated suspensions for aerial application targeting container
mosquitoes may require the use of a venturi inductor system. Consult your Valent BioSciences
Corporation representative regarding sources for this equipment.
AVOID CONTINUOUS AGITATION OF THE SPRAY MIXTURE DURING SPRAYING. For ground
spraying, apply 1.75–14 oz/acre (50–400 g/acre; 123–988 g/ha) of VectoBac WG in 1–100 gallons
of water per acre (10–950 liters/ha) using hand-pump, air blast, mist blower, or other spray
equipment. For aerial application, apply 1.75–14 oz/acre (50-400 g/acre; 123–988 g/ha) of
VectoBac WG in 0.25–10 gallons of water per acre (2.4–93.5 liters/ha) through fixed wing or
helicopter aircraft equipped with either conventional boom and nozzle system or rotary atomizers to
provide uniform coverage of the target area.
Container Mosquito Applications — Wide Area Spray (Backpack)Container Mosquito Applications — Direct PlacementGeneral
Application Rates
General
Mixing Instructions
Direct (undiluted) applications of VectoBac WG are used to treat water containers in many countries
around the globe. Direct application is best suited for treatment of easily located containers with a
volume > 50 liters (13.2 gallons), but can be used for smaller containers as well. This approach has
delivered extended residual control for up to three months in a variety of container types. Examples
of these containers include potable water reservoirs such as earthen or cement jars, plastic or metal
drums, and fiberglass or cement tanks. Application rates of 2–8 g per 1000 liters (264 gallons) of
container capacity (100–400 mg/50 L) should be used depending on habitat conditions and
program objectives. Application may be made with a calibrated scoop or spoon. Monitor for efficacy
and residual control by counting numbers of late instar and pupae in treated containers before and
after treatment. Initial late instar/pupae reductions should be seen in 72 hours. Re-treatment
interval should be based on program objectives. Consult Valent BioSciences for additional technical
assistance regarding this approach.
Larval Habitat
Water reservoirs ≥ 50L in volume capacity
Container type:
• Cement, earthen, plastic, metal, fiberglass
VectoBac WG Application Method*
Direct application into containers
2–8g / 1,000 L
Application Equipment
Calibrated scoop/spoon
1 teaspoon/200 L (dose ~ 8g/1,000L)
* Consult your VBC technical specialist to determine optimal application methods to meet your program objectives.
Recommended Dilution Rates for VectoBac® WG per Hectare
Larval Habitat
Covered concrete drains
Uncovered concrete drains, roof gutters,
sparse vegetation, containers, tires, etc.
Trash, dense vegetation, leaf litter, etc.
Wide open areas of larval habitat
VectoBac WG Application Method
150–200 L (high volume application)
30–60 L (moderate volume application)
15–30 L (low volume application)
7–10 L (ultra-low volume application)
Application Equipment
Motorized backpack or shoulder-carried blowers
Motorized backpack or shoulder-carried blowers
Motorized backpack or shoulder-carried blowers
Vehicle-mounted ULV sprayers
Larval Habitat
Water reservoirs ≤ 50 L in volume capacity
Container type:
• Cement, earthen, plastic, metal, fiberglass
• Concrete drainage system
• Covered and uncovered drains
• Roof gutters
• Trash
• Tires
• Vegetation – leaf axils, tree holes, leaf litter
• Natural pools with leaf litter
VectoBac WG Application Method*
Ground spray
250–500 g/ha (1 ha = 10,000 m2)
* Consult your VBC technical specialist to determine optimal application methods to meet your program objectives.
Application Equipment
Ground spray equipment
• Vehicle-mounted sprayers
• Motorized backpack or
shoulder-carried blowers
• Hand-carried pump sprayers
Water-Dispersible Granule
141737VBC_VectoBac_WG_TechUseSheet_WaterDispersibleGranule_6-Panel.indd 4-6 3/9/15 6:40 PM
TECHNICAL USE SHEET
VectoBac® WG
Bacterial Larvicide
TECHNICAL USE SHEET
VectoBac® WG
Bacterial Larvicide
VectoBac® WG Biological Larvicide is available in the following package sizes:
• USA only
– 1 lb (0.45 kg) HDPE plastic canisters, packaged 24 per case
– 25 lb (11.3 kg) drums
• International only
– 0.5 kg HDPE plastic canisters, packaged 24 per case
– 25 kg drums
Check with your local distributor or Valent BioSciences technical
representative to see what packaging is available in your area.
GROUND (VEHICLE-MOUNTED SPRAYING)
Tests are currently being conducted by mosquito control professionals globally on how to best apply
VectoBac WG through truck-mounted spray equipment. Several tests are showing promise, and
results are expected in the near future. Several factors make larviciding for container mosquitoes
different from standard ULV adulticiding. The objective of ULV adulticiding is to release an airborne
cloud of very small droplets of insecticide that will impinge upon fl ying mosquitoes and deliver a
toxic dose to the insect by contact. When spraying microbial larvicides for container mosquito
control, the objective is to disperse droplets of larvicide across a targeted area that will then fall into
containers and deliver a suffi cient dose to kill mosquito larvae that are fi lter feeding in the water.
Selection of spray equipment to achieve appropriate droplet spectra for specifi c environmental
conditions is a complex matter. Density of structures and vegetation in the targeted area as well as
atmospheric conditions need to be considered. Please contact your local Valent BioSciences
technical specialist for additional assistance regarding this approach.
AERIAL
In 2011, the Florida Keys Mosquito and Vector Control District (U.S.) implemented the world’s fi rst
aerial larviciding program to control dengue vectors on a large scale. In 2010, the district developed
the method in cooperation with Valent BioSciences Corporation and Helicopter Applicators Inc. in
response to an ongoing dengue outbreak. The method has been optimized with support of REMSpC
Spray Consulting. Applications are made using six Micronair® AU5000 rotary atomizers operating at
4,000–5,000 rpm on a Bell 206B helicopter. Treatments are made with a spray volume of 0.5
gallons per acre and a Vectobac WG dose of 0.5 lbs/acre. Two hundred-foot swaths are employed at
an altitude of 100 feet and an airspeed of 80 mph. Offset spraying is employed during missions
based on wind conditions and the AGDISP model applied by REMSpC. Early in 2011, the district
began employing this method in conjunction with intensive ground efforts to control Aedes aegypti
in Key West. Subsequent research by the district has shown adult population suppression is
occurring as a result of the treatments, and Aedes aegypti populations are declining in Key West.
Please contact your local Valent BioSciences technical specialist for additional assistance regarding
this approach.
These types of applications for control of container Aedes are highly specialized. For ground (truck)
applications, this approach has only just recently been implemented operationally in Southeast
Asia, with the U.S. and Europe currently in the development phase.
VectoBac® WG (also known as WDG) Biological Larvicide is a water-dispersible
granule formulation of Bacillus thuringiensis subsp. israelensis strain AM65-52
for control of mosquito larvae. The product has a potency of 3,000 International
Toxin Units (ITU) per milligram against Aedes aegypti larvae. It is designed for
use in aqueous spray mixes and for direct application to water containers.
VectoBac WG was the fi rst bacterial larvicide to complete the World Health
Organization Pesticide Evaluation Scheme.
Consisting of only Bti strain AM65-52 and food-grade (U.S. EPA list 4) inert ingredients, VectoBac
WG has received approval for application in organic crops (U.S.: Organic Materials Review Institute
[OMRI] and National Organic Program [NOP] certifi ed) and sensitive habitats in various countries
around the world. This versatile formulation allows a variety of application modes and uses for
mosquito control.
Container species such as Aedes aegypti and Aedes albopictus are a major source of concern for
mosquito abatement agencies across the globe due to their high vectorial capacity. In addition,
adulticiding these species can be quite diffi cult because of their preference for host seeking and
oviposition in the daytime. Various application methods of VectoBac WG complement integrated
vector management (IVM) programs that are aimed at reducing these species that have the
capacity to transmit dengue, chikungunya, and yellow fever, as well as other arboviruses.
BACTER IAL LAR VICIDE
Vec toBac® WG
WATER DISP ERSIBLE GR A NULE
For Organic Production
FEATURES
• Bacterial larvicide
• Highly specifi c activity on mosquitoes
• Water-dispersible granule
• High-potency dry formulation
• Mixes easily in water
• First bacterial larvicide to complete the
WHO Pesticide Evaluation Scheme
• Effective in direct application for residual
control of container mosquitoes
• Effective in ground and aerial spray
application as aerosol or mist droplets for
wide-area control of container mosquitoes
• Quickly kills mosquito larvae (2–24 hours)
BENEFITS
• Not harmful to non-target organism
populations
• Aqueous spray or direct application
• ncreased shelf life
• Decreased weight to transport
• Sprays easily through many equipment types
• Consistent, quality product that aligns
with international health standards for
public health
• Application fl exibility for effectively managing
dengue and chikungunya disease vectors
• Results visible quickly in fi eld
Packaging
Container Mosquito Applications — Wide Area Spray (Ground Vehicle and Aircraft)
Water-DispersibleGranule
141737VBC_VectoBac_WG_TechUseSheet_WaterDispersibleGranule_6-Panel.indd 1-3 3/9/15 6:40 PM
TECHNICAL USE SHEET
VectoBac® WG
Bacterial Larvicide
TECHNICAL USE SHEET
VectoBac® WG
Bacterial Larvicide
VectoBac® WG Biological Larvicide is available in the following package sizes:
• USA only
– 1 lb (0.45 kg) HDPE plastic canisters, packaged 24 per case
– 25 lb (11.3 kg) drums
• International only
– 0.5 kg HDPE plastic canisters, packaged 24 per case
– 25 kg drums
Check with your local distributor or Valent BioSciences technical
representative to see what packaging is available in your area.
GROUND (VEHICLE-MOUNTED SPRAYING)
Tests are currently being conducted by mosquito control professionals globally on how to best apply
VectoBac WG through truck-mounted spray equipment. Several tests are showing promise, and
results are expected in the near future. Several factors make larviciding for container mosquitoes
different from standard ULV adulticiding. The objective of ULV adulticiding is to release an airborne
cloud of very small droplets of insecticide that will impinge upon fl ying mosquitoes and deliver a
toxic dose to the insect by contact. When spraying microbial larvicides for container mosquito
control, the objective is to disperse droplets of larvicide across a targeted area that will then fall into
containers and deliver a suffi cient dose to kill mosquito larvae that are fi lter feeding in the water.
Selection of spray equipment to achieve appropriate droplet spectra for specifi c environmental
conditions is a complex matter. Density of structures and vegetation in the targeted area as well as
atmospheric conditions need to be considered. Please contact your local Valent BioSciences
technical specialist for additional assistance regarding this approach.
AERIAL
In 2011, the Florida Keys Mosquito and Vector Control District (U.S.) implemented the world’s fi rst
aerial larviciding program to control dengue vectors on a large scale. In 2010, the district developed
the method in cooperation with Valent BioSciences Corporation and Helicopter Applicators Inc. in
response to an ongoing dengue outbreak. The method has been optimized with support of REMSpC
Spray Consulting. Applications are made using six Micronair® AU5000 rotary atomizers operating at
4,000–5,000 rpm on a Bell 206B helicopter. Treatments are made with a spray volume of 0.5
gallons per acre and a Vectobac WG dose of 0.5 lbs/acre. Two hundred-foot swaths are employed at
an altitude of 100 feet and an airspeed of 80 mph. Offset spraying is employed during missions
based on wind conditions and the AGDISP model applied by REMSpC. Early in 2011, the district
began employing this method in conjunction with intensive ground efforts to control Aedes aegypti
in Key West. Subsequent research by the district has shown adult population suppression is
occurring as a result of the treatments, and Aedes aegypti populations are declining in Key West.
Please contact your local Valent BioSciences technical specialist for additional assistance regarding
this approach.
These types of applications for control of container Aedes are highly specialized. For ground (truck)
applications, this approach has only just recently been implemented operationally in Southeast
Asia, with the U.S. and Europe currently in the development phase.
VectoBac® WG (also known as WDG) Biological Larvicide is a water-dispersible
granule formulation of Bacillus thuringiensis subsp. israelensis strain AM65-52
for control of mosquito larvae. The product has a potency of 3,000 International
Toxin Units (ITU) per milligram against Aedes aegypti larvae. It is designed for
use in aqueous spray mixes and for direct application to water containers.
VectoBac WG was the fi rst bacterial larvicide to complete the World Health
Organization Pesticide Evaluation Scheme.
Consisting of only Bti strain AM65-52 and food-grade (U.S. EPA list 4) inert ingredients, VectoBac
WG has received approval for application in organic crops (U.S.: Organic Materials Review Institute
[OMRI] and National Organic Program [NOP] certifi ed) and sensitive habitats in various countries
around the world. This versatile formulation allows a variety of application modes and uses for
mosquito control.
Container species such as Aedes aegypti and Aedes albopictus are a major source of concern for
mosquito abatement agencies across the globe due to their high vectorial capacity. In addition,
adulticiding these species can be quite diffi cult because of their preference for host seeking and
oviposition in the daytime. Various application methods of VectoBac WG complement integrated
vector management (IVM) programs that are aimed at reducing these species that have the
capacity to transmit dengue, chikungunya, and yellow fever, as well as other arboviruses.
BACTER IAL LAR VICIDE
VectoBac® W G
WATER DI S P ERSIBLE GRANULE
For Organic Production
FEATURES
• Bacterial larvicide
• Highly specifi c activity on mosquitoes
• Water-dispersible granule
• High-potency dry formulation
• Mixes easily in water
• First bacterial larvicide to complete the
WHO Pesticide Evaluation Scheme
• Effective in direct application for residual
control of container mosquitoes
• Effective in ground and aerial spray
application as aerosol or mist droplets for
wide-area control of container mosquitoes
• Quickly kills mosquito larvae (2–24 hours)
BENEFITS
• Not harmful to non-target organism
populations
• Aqueous spray or direct application
• ncreased shelf life
• Decreased weight to transport
• Sprays easily through many equipment types
• Consistent, quality product that aligns
with international health standards for
public health
• Application fl exibility for effectively managing
dengue and chikungunya disease vectors
• Results visible quickly in fi eld
Packaging
Container Mosquito Applications — Wide Area Spray (Ground Vehicle and Aircraft)
Water-DispersibleGranule
141737VBC_VectoBac_WG_TechUseSheet_WaterDispersibleGranule_6-Panel.indd 1-3 3/9/15 6:40 PM