The investigation was done about incidence of gray leaf spot of maize in Heilongjiang province.
对玉米灰斑病在黑龙江省的发生情况进行了调查。
Gray leaf spot of maize occurred suddenly in Fengqing County, Yunnan Province in the recent years.
玉米灰斑病是凤庆县近年突然暴发流行的一种玉米叶部病害。
Gray leaf spot of maize occurred suddenly in Fengqing County, Yunnan Province in the recent years.
玉米灰斑病是凤庆县近年突然暴发流行的一种玉米叶部病害。
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