A pesticidal composition comprises at least one soil conditioner selected from the group consisting of organic soil conditioners, microorganisms, activators, and combinations thereof and an active ingredient group alpha (AIGA) compound. The weight ratio of soil conditioner to AIGA compound is at least about 20:1. The pesticidal composition shows an enhanced residue activity of the AIGA compound in soil. A method of controlling a sap-feeding insect on a top part of the plant comprises applying a pesticidally effective amount of such pesticidal composition to soil around a root system of the plant. A method of controlling pests comprises applying a pesticidally effective amount of such pesticidal composition to at least one of: soil, seed of a plant, a portion of a plant, and locus where control of pests is desired.一種殺蟲組成物包含至少一種土壤改良劑及一種活性成分群組α(AIGA)化合物，該至少一土壤改良劑係選自於有機土壤改良劑、微生物、活化劑，及其之組合所構成的群組。土壤改良劑對AIGA化合物之重量比為至少大約20：1。該殺蟲組成物顯示土壤內AIGA化合物提升的殘餘物活性。一種控制於植物的頂部上吸食汁液的昆蟲之方法包含施用殺蟲有效量的此殺蟲組成物至植物的根部系統附近的土壤。一種控制害蟲的方法包含施用殺蟲有效量的此殺蟲組成物至下列之至少一處：土壤、植物種子、植物的一部份，及希望控制害蟲之所在地。
