北京农业大学植保系研制的无毒高脂膜,是一种广谱保护剂,该药喷在铃体表面后,能形成一层连续的薄膜层,使其不受外界病菌侵染。1984年共设三个处理,即高脂膜250倍、25%多菌灵500倍和清水对照。8月25日施药,亩喷稀释液120斤。施药前调查全部青铃,病铃分为四级,计算其病指,施药后7 Beijing Agricultural University Plant Protection developed non-toxic high-fat film, is a broad-spectrum protective agent, the drug sprayed on the surface of the bell body, to form a continuous layer of film so that it is not infected by external bacteria. In 1984 a total of three treatments, namely high-fat film 250 times, 25% carbendazim 500 times and water control. August 25 spraying, mu spray diluent 120 pounds. Survey before the application of all the green bell, sick bell is divided into four, calculate the disease means that after spraying 7