VectoBac WG

VectoBacWG is a water-dispersible granule formulation ofBacillus thuringiensis  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. VectoBacWG was the first bacterial larvicide to complete the World Health Organization Pesticide Evaluation Scheme.


Active Ingredient:

Bacillus thuringiensis, var. israelensis. (Bti)

Product Specs:

37.4% Bti

Where and When to Use VECTOBAC WG:

Consisting of only Bti (strain AM65-52) and food-grade (US EPA list 4) inert ingredients, VectoBac WG has received approval for application in organic crops 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 large vectoral capacity. In addition, adulticiding these species can be quite difficult based on their flight times and other behaviors. Various application methods of VectoBac WG allow for an effective supplement to Integrated Vector Management (IVM) programs aimed at reducing these species that have the capacity to transmit dengue, chikungunya, yellow fever, as well as other arboviruses.


  • Dry formulation
  • Mixes easily in water
  • First and only bacterial larvicide to be certified by 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
  • Highly specific activity on mosquitoes
  • Quickly kills mosquito larvae (2-24 hours)

Benefits of VectoBac WG:

  • Increased storage shelf life
  • Decreased weight to transport
  • Aqueous spray or direct application
  • Sprays easily through many equipment types
  • Not harmful to non-target organisms
  • Results assessed quickly in field

Mode of Action:

The larvae ingest the insecticide, consisting of Bti spores and crystalline toxins produced by the bacteria. Only when activated by the larva’s specific gut PH and enzymes, do the crystals become toxic, causing damage to the gut of the mosquito. Mortality rate is dependent on consumption of the Bti by 1st through early 4th instar larvae. Higher application rates are recommended if 3rd and early 4th instar larvae are predominant.