Deltamethrin is the most toxic to insects among the pyrethroid insecticides. It has contact and stomach poisoning effects, rapid contact killing, strong knockdown, no fumigation and systemic effects, and has no fumigation and systemic effects at high concentrations. Some pests have a repellent effect. Long duration (7-12 days).

Crop protection uses include: Coleoptera, Heteroptera, Homoptera, Lepidoptera and Thysanoptera in cereals, citrus, cotton, grapes, maize, oilseed rape, soya beans, top fruit and vegetables.

 It controls Acrididae, and is recommended against locusts. Soil surface sprays control Noctuidae. 

It is used against indoor crawling and flying insects, and pests of stored grain and timber (Blattodea, Culicidae, Muscidae). Dip or spray, and pour-on applications give good control of Muscidae, Tabanidae, Ixodidae and other Acari on cattle, sheep and pigs, etc.

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