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一、取代苯类杀菌剂 (一)百菌清(大克尼尔) 1.一般特性和作用:百菌清虽属老药,但近几年来应用方法有新的发展。它无内吸传导作用,是一个保护性广谱杀菌剂,在菜田应用较广泛,喷在植物表面粘着性强,耐雨水冲刷,常规用量下残效期7—10天。其主要作用是破坏真菌的酶的活力,尤其对黄瓜霜霉病具有较好的防治效果,属于低毒性药剂,但每天大剂量接触,应注意慢性毒性。主要加工剂型有75％百菌清可湿性粉,20％、10％、和25％百菌清烟剂以及7.5％、5％百
First, the substituted benzene fungicides (A) chlorothalonil (large Kenier) 1. General characteristics and role: Chlorothalonil is an old drug, but in recent years the application of methods have new developments. It has no internal conduction and is a protective broad-spectrum bactericide. It is widely used in vegetable fields. It has strong adhesiveness on the plant surface and is resistant to rain erosion. The residual amount is 7-10 days under the conventional dosage. Its main role is to undermine the activity of fungal enzymes, especially cucumber downy mildew has a good control effect, are low toxicity agents, but daily high-dose exposure, should pay attention to chronic toxicity. The main processing formulations are 75% chlorothalonil WP, 20%, 10%, and 25% chlorothalonil and 7.5%, 5%