Carbaryl, Carbofuran, and Methomyl - National Marine Fisheries ...

Figure 35. Exposure analysis
Summary of Chemical Fate of A.I.s
Carbaryl Carbofuran Methomyl
Figure 36. Chemical structures of carbaryl, carbofuran, and methomyl.
Carbaryl
Co-occurrence of action stressors
and listed species
Distribution of
individuals
Exposure Profile
“Carbaryl is a widely used pesticide that is commonly detected in the environment from
its application in agricultural and non-agricultural settings (EPA 2003).” Carbaryl is
primarily applied to terrestrial habitats, although a 24(c) registration in Washington State
allows for application to commercial oyster beds to control native ghost shrimp and mud
shrimp. Carbaryl can contaminate surface waters via runoff, erosion, leaching, and spray
drift from application at terrestrial sites, or direct application to aquatic habitats.
Carbaryl and its primary degradate, 1-naphthol, are fairly mobile and slightly persistent in
the environment. Although they are not likely to persist or accumulate under most
conditions, they may do so under acidic conditions with limited microbial activity.
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Distribution of
habitat