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大豆霜霉病是我区大豆病害中分布广、流行快、危害性较大的真菌病害。此病主要发生在大豆初花至鼓粒期,造成植株叶片枯黄脱落,结实率和粒重显著下降。我们在本所试验地于1983～84年进行了药剂防治试验。大豆品种为铁丰18(1983年)及铁78012—5—3(1984年),共6个处理:①50％多菌灵粉剂,②90％乙磷铝粉剂,③70％托布津粉剂,④65％代森锌粉剂,⑤50％多菌灵与90％乙磷铝粉剂混用,⑥不施药为对照。1983年有①、③、④、⑥共4个处理,1984年为6个处理。随机区组,重复3次,小区面积3米~2。药液浓度均为2‰(处理⑤各按1‰配制),亩用药液量100斤,于霜霉病发生初期进行叶面喷雾。施药后1个月调查防治效
Soybean downy mildew is my area of soybean disease is widely distributed, fast-growing, more harmful fungal diseases. The disease occurs mainly in the early flowering of soybean to the drum stage, causing the plant leaves withered off, the seed setting rate and grain weight decreased significantly. We carried out the pesticide control trials in our laboratory in 1983-84. Soybean cultivars were Tiefeng 18 (1983) and Tie 78012-5-3 (1984), with a total of 6 treatments: ①50% carbendazim powder, ②90% phosphorus and aluminum powder, ③70% Topaz powder, ④65% Mori zinc powder, ⑤50% carbendazim and 90% phosphorus phosphorus powder mixed, ⑥ no application as a control. In 1983, ①, ③, ④, ⑥ a total of four treatment, 1984 six treatment. Random block, repeated 3 times, the plot area of 3 m ~ 2. The concentration of the liquid was 2 ‰ (treatment ⑤ by 1 ‰ each preparation), mu amount of liquid medication 100 pounds, in the early stage of downy mildew foliar spray. 1 month after spraying to investigate the effectiveness of prevention and treatment