Fenvalerate
The 2-S alpha (or SS) configuration, known as esfenvalerate, is the most insecticidally active isomer.In laboratory animals, central nervous system toxicity is observed following acute or short-term exposure.Fenvalerate has applications against a wide range of pests including some of the more destructive such as the Helicoverpa assulta.It is found in some emulsifiable concentrates, ULV, wettable powders, slow release formulations, insecticidal fogs, and granules.Fenvalerate does not affect plants, but is active for an extended period of time.