Mechanism of Action
Pyrethroids, including lambda-cyhalothrin, disrupt the functioning of the nervous system in an organism. By disrupting the nervous system of insects, lambdacyhalothrin may cause paralysis or death. Temperature influences its effectiveness. It is highly toxic to many fish and aquatic invertebrate species. Bioconcentration is possible in aquatic species, but bioaccumulation is not likely. Binding of lambda-cyhalothrin to soil and sediment reduces exposure and may lessen the risk to fish. Field studies found no significant adverse effects to fish. Lambda-cyhalothrin is also highly toxic to bees, although again field studies found few effects. In laboratory studies, alkaline water degraded lambda-cyhalothrin with an approximate half-life of 7 days, although at neutral and acidic pH's degradation did not occcur. Sunlight accelerates degradation in water and soil. The half-life of lambda-cyhalothrin on plant surfaces is 5 days. Lambda-cyhalothrin has a low potential to contaminate ground water due to its low water solubility and high potential to bind to soil.
Read more about this topic: Cyhalothrin
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