一、使用范围百菌清及速克灵烟剂主要用于蔬菜多种病害的防治,敌敌畏烟剂主要用于蔬菜多种虫害的防治,尤对温室白粉虱及蚜虫有特效。二、使用时间傍晚盖草苫之后点燃最为适宜,尤以阴、雨、雪天气最佳。傍晚点燃的好处:一是棚子封盖严密,点燃后烟雾不易扩散到棚外而降低防效;二是傍晚大气压力大,点燃后烟雾不易漂浮,能提高植株底部叶片 First, the use of chlorothalonil and Ling Kuling Smoke mainly for the prevention and treatment of a variety of diseases of vegetables, dichlorvos mainly used for prevention and control of a variety of pests of vegetables, especially on greenhouse whiteflies and aphids have special effects. Second, the use of time in the evening covered with grass 点 lit the most appropriate, especially in overcast, rain, snow, the best weather. The advantages of lit in the evening: First, the shed sealed tightly, ignited after the smoke is not easy to spread outside the shed to reduce the effect of prevention; second atmospheric pressure in the evening, lit after the smoke is not easy to float, can increase the bottom of the leaves