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寻甸县天生桥地区马铃薯的种植面积占旱地的30％以上,是广大社员的主要口粮之一。晚疫病则是马铃薯和番茄作物上具有毁灭性的病害。据1971—1980年的断续观察,晚疫病的流行,一旦与马铃薯现蕾开花期(感病期)相吻合,就会造成马铃薯大减产,其产量损失达30％左右。同时晚疫病是有规律地,周期性的流行,一般隔2—3年流行一次。为此,我们对晚疫病的流行与防治作了如下的初步调查研究。一、马铃著晚疫病的流行 (一)晚疫病的流行与薯块带病的关系。
Tianshengqiao Xundian County area planted potato area accounted for more than 30% of dry land, is one of the members of the majority of the main rations. Late blight is a devastating disease on potatoes and tomato crops. According to the intermittent observation from 1971 to 1980, the epidemic of late blight, once coincided with the budding and flowering stage (susceptible stage) of potato, will result in large-scale yield reduction of potato with a loss of about 30% of its output. At the same time late blight is a regular, cyclical epidemic, generally every 2-3 years epidemic. To this end, we made the following preliminary investigation on the epidemic and prevention of late blight. First, the prevalence of late blight (a) late blight epidemic and tuberculosis disease.