One of the famous and basic classifications of insecticide is based on mode of entry (it means the way by which insecticide entry into the body of organism which are mostly insects). This classification is given below with detail of each group,
1. Stomach Insecticides
Stomach insecticides are mostly recommended and used against chewing type of insect pests because these insecticides enter into the stomach of the insect through their food.
2. Contact Insecticides
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