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当前,华南、西南、江南中稻和东北单季稻处于齐穗至灌浆乳熟期,华南、江南、长江中游晚稻处于分蘖期,长江下游和江淮单季晚稻处于拔节至孕穗期,田间病虫发生发展速度快。其中稻飞虱短翅型成虫在江南和长江中下游晚稻区增长速度快,局部虫量高,重发威胁大;稻纵卷叶螟在长江中下游晚稻区虫卵量较高,呈加重发生态势;稻瘟病在华南、江南、长江中下游晚稻区扩展速度快,江苏局部较重,后期重发风险高。一、迁飞性害虫稻飞虱在华南、江南、西南和长江中下游稻区累计发生面积1.88亿亩次,与上年同期持平。8
At present, the single crop rice in South China, Southwest China, South China, Northeast China and Northeast China are in the ripening period from heading to filling. The late rice in South China, South China and the middle reaches of the Yangtze River is in the tillering stage, the Yangtze River and the late rice in Jianghuai single season are at the stage of jointing to booting, fast. Among them, the short-winged adults of planthopper grew fast in the southern and middle and lower reaches of the Yangtze River, with high local pests and high threat of recurrence. The rice larvae had a higher incidence of pests in late rice in the middle and lower reaches of the Yangtze River, The blast situation in southern China, southern Yangtze River, the Yangtze River downstream of the rapid expansion of rice, Jiangsu part of the heavier, high risk of recurrence later. First, migratory pests Planthoppers in the southern, southern, southwest and Yangtze River mid-lower reaches of the cumulative area of 188 million mu of rice, with the same period the previous year. 8