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历年实践证明,晚季粮食作物的病虫发生量大,情况复杂,危害往往比早季重。因为虫口基数大、菌源多、繁殖快,世代重叠,在同一时间,同一田块上可能有多种病虫同时为害,同一种病虫又有可能母虫小虫共存;台风暴雨的袭击,也会影响作物的抗病能力。晚季不但要注意“常发性”的病虫,还要警惕“突发性”的病虫。据各地测报站和我站各基点观测、调查资料综合分析,今年晚季,几种“常发性”病虫,如黑尼叶蝉、稻飞虱、卷叶螟、三化螟、稻纹枯病、菌核病等,发生发展趋势将可能较严重,几种“突发性”病虫,如白叶枯病、水稻病毒病、粘虫、稻瘿蚊等,在局部地区也可能暴发。
Years of practice has proved that late-season food crops pests and diseases occur in large quantities, the situation is complicated, the damage is often heavier than in the early season. Because of the large population of insect population, multiple bacterial sources, rapid propagation and overlapping generations, at the same time, there may be a variety of pests and diseases on the same plot and the same pests may coexist with insect pest insects; typhoon storm attack, Will also affect the disease resistance of crops. Late season should not only pay attention to “common” pests, but also vigilance “sudden ” pests. According to the observation points and the survey data of all the stations in our country and the stations in our country, the late-September this year, several kinds of pests such as Haematopinus, Rice sheath blight, sclerotinia, etc., the development trend will be more serious, several “sudden” pests, such as bacterial leaf blight, rice virus disease, armyworm, rice gall midge, etc., in the local Regions may also be affected.