Emerging Disease Issues - Larvicides Commonly Used in Michigan

Larvicides Commonly Used in Michigan

Table 1

Table 1. Mosquito Larvicides Commonly Used in Michigan ¹

Note: Mosquito larvicides with methoprene or Bacillus sphaericus as the active ingredient have been found to be particularly effective for control of Culex mosquito larvae in catch basins.

*Larvicide*	*Type*	*Action*	*Primary Use*
Bacillus thuringiensis israelensis (Bti)	Bacterial	Gut toxin	Floodwater, catch basins
Bacillus sphaericus (Bs)	Bacterial	Gut toxin	Catch basins, septic waters (for *Culex*)
Altosid^R (Methoprene)	Growth regulator	Prevents larvae from developing to adults	Catch basins, containers, floodwater sites
Abate^R (Temephos)	Organophosphate	Directly toxic	Tires, Containers, floodwater sites
Oils (Golden Bear^R & BVA^R) ^2,3	Surface treatment	Suffocation: film covers air tubes of larvae	Floodwater, catch basins, septic waters

¹ Always read and follow all current pesticide label instructions. If any information in these recommendations disagrees with the pesticide label, the label instructions must be followed. Use of a product name does not constitute product endorsement. All pesticides must be registered with USEPA and the MDA. All applications of pesticides to surface waters of the state and wastewater treatment facilities must be approved by the MDEQ. See MDEQ Approval Process of Mosquito Control Projects.

² Monomolecular film larvicide (Agnique^R , an alcohol-derived product) that acts like an oil larvicide has become available recently.

³ All oils used as larvicides must be registered with USEPA and the MDA.