【摘要】 1988～1989年,我们对山东省泰安市小麦和大麦煤污病的发生消长规律进行了调查分析,发现:麦田煤污病的发生发展与麦田蚜虫和田间湿度关系密切。麦田蚜虫数量少时,煤污病的病情轻,病情消长与蚜量变化呈正相关;麦田蚜虫数量较多时,煤污病病情呈多峰曲线。田间湿度大,煤污病发生重。病情指数在75以上的小麦田,千粒重减少19.57%。室内药效测定表明:多菌灵和甲基托布津等对麦田煤污病菌有较好的抑制效果。本文并讨论了麦田煤污病的综合防治措施。更多还原

【Abstract】 Investigation on developmental pattern of sooty mould in wheat and barley carried outfrom 1988 to 1989 in Taian city indicated that the sooty mould was closely related with thenumber of aphids and relative humidity in fields.When aphids per 100 plants were less than2000,the dicease indices were positively correlated with varying number of aphids.Twocurves were discrete when numbers of aphids per 100 plants were more than 6000.High rela-tive humidity increased sooty mould.The weight per 1000 grains of wheat decreased by19.57% when the disease index was above 75.Screening fungicides showed thatcarbendazim and thiophanatemethyl were effective against the main pathogens of sootymould.The integrated control of sooty mould in wheat and barley is also discussed.更多还原