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生物杀虫剂的应用技术是进行无公害栽培技术的核心。目前,农业生产中推广应用的生物杀虫剂主要有苏云金芽孢杆菌(BT)、阿维菌素、烟·参碱(烟碱、苦参碱)等。 1.明确作用机理,选择适宜菌剂细菌、病毒等病原微生物必须经昆虫口器摄入经消化道感染而杀死寄主,一般只对咀嚼式口器害虫有效,而无法作用于将口针插入植物韧皮部吸食汁液的刺吸式口器害虫。苏云金芽孢杆菌的主要靶标害虫是咀嚼式口器害虫(如鳞翅目、鞘翅目等),对蚜虫、飞虱、粉虱等刺吸式口器害虫却无能为力。阿维菌素是抗生素内杀虫杀螨剂,对害虫主要有胃毒和触杀作用,几乎无内吸和
Biopesticide application technology is the core of pollution-free cultivation techniques. At present, the main bio-pesticides promoted in agricultural production are Bacillus thuringiensis (BT), avermectin, tobacco ginseng (nicotine, matrine) and the like. 1. A clear mechanism of action, select the appropriate bacteria Bacteria, viruses and other pathogenic microorganisms must be insects through mouthparts ingestion by the digestive tract infection and kill the host, generally only chewing mouthparts pests effective, but can not be used to insert the needle Phloem phloem sap-sucking mouthparts pests. Bacillus thuringiensis main target pests are chewing mouthparts pests (such as Lepidoptera, Coleoptera, etc.), aphids, planthoppers, whiteflies and other sucking mouthparts pests are powerless. Abamectin antibiotic insecticide acaricide, stomach poisoning and contact effects on pests, almost no internal absorption and