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根据今年上半年水稻病虫发生实况,结合稻田生态特点和后期气象预报,预计秋季(7-10月)该省水稻病虫以虫害为主,总体发生程度5级,发生总面积超过1亿亩次。一、稻飞虱:预计六(4)代在南部、北部和鄂东北5级发生,中部4级发生,发生面积2400万亩,低龄若虫盛期7月底至8月中旬,主要为害中稻。七(5)代在鄂东南、江汉平原和鄂东北局部5级发生,低龄若虫盛期9月上中旬,发生面积1000万亩,主要为害晚稻。如果9-10月秋季气温偏高,9月底至10月中旬前
According to the actual occurrence of rice pests and diseases in the first half of this year, combined with the ecological characteristics of paddy fields and the later meteorological forecast, it is estimated that there will be pests mainly in the rice pests and diseases in the autumn (July-October) with a total occurrence of 5 and a total area of more than 100 million mu Times. First, planthoppers: It is estimated that six (4) generations occur in the southern, northern and northeastern Hubei Province 5, occurred in the central 4, an area of 24.4 million mu, juvenile nymphs end of July to mid August, the main damage to rice. Seven (5) generations occurred in the southeastern part of Hubei Province, the Jianghan Plain and the northeastern part of Hubei Province. Grade five occurred in the mid-September of mid-nauplii, with an area of 10 million mu and mainly affecting late rice. If the September-October autumn temperatures are high, the end of September to mid-October before