粉尘剂是一种新型农药剂型,具有省工、省力、防治彻底、效果好等优点,还可以避免烟剂在点燃时对附近植株引起药害和有效成分热分解等问题。 (1)施用时期。粉尘剂有防治病害粉尘剂和灭蚜粉尘剂两种:对百菌清等防治病害粉尘剂,在发病初期或发病前开始施用;灭蚜粉尘剂在虫害发生初期施用。最好在早晨或傍晚放风前 Dust agent is a new pesticide dosage form, which has the advantages of labor-saving, labor-saving, thorough prevention and cure, good effect and the like, and can also avoid the problem of the phytotoxicity and pyrolysis of active ingredients caused by the smoke agent on the nearby plants when ignited. (1) Application period. Dust agents have disease prevention and control dust and dust aphids two kinds of insecticides: chlorothalonil and other disease prevention and control dusts, early onset or onset before the start of application; off aphids dust agent in the initial application of pests. Best in the morning or evening before the blast