Reliable elimination requires a collaboration in between theprofessional pest control operators( PCOs) and the home owner, with both taking action to get the parasites out-- as well as them keep out. Pesticides are put on crops by agricultural airplane, tractor-mounted crop sprayers or as seed dressings to control parasites. The killing of all-natural opponents of the target insect should be reduced. This is especially essential in nations where there are natural reservoirs of insects and their adversaries in the countryside surrounding hacienda plants, and also these co-exist in a fragile balance. Usually in less-developed countries, the crops are well adapted to the regional circumstance and no chemicals are required.