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根据今年西华县小麦品种布局、冬春长势、冬季气温及春季长期天气预报,参照历年病虫发生资料,预计今年该县麦田病虫害发生总趋势为中度偏重发生,发生面积27.5万公顷。其中病害发生面积14.2万公顷,万亩次,虫害发生面积13.3万公顷。发生偏重的是小麦纹枯病、麦穗蚜和麦田杂草。一、主要病虫害发生趋势1.小麦蚜虫预计苗蚜为轻发生,穗蚜中度偏重发生。发生为害盛期推迟,预计发生面积5.3万公顷。预测依据:(1)根据西华县历年麦蚜发生资料分析,影
According to the distribution of wheat varieties in Xihua County this year, winter and spring growth, winter temperatures and long-term spring weather forecasts, it is estimated that the overall trend of occurrence of pests will be moderately severe this year with an area of 275,000 hectares. One of the disease area of 142,000 hectares, mu of times, pest occurrence area of 133,000 hectares. The preoccupations are wheat sheath blight, wheat aphid and wheat field weeds. First, the main trends of pests and diseases 1. Wheat aphids are expected to emerge as young light aphids, spore aphid moderate emphasis occurred. Postpone the peak of the occurrence of damage, the expected area of 53,000 hectares. Prediction basis: (1) According to Xihua County wheat aphid data analysis, shadow