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根据2005年北京市病虫总体发生情况,结合京郊种植作物布局、秋季病虫越冬基数及2006年春季天气预报综合分析,对2006年郊区主要粮、经作物病虫草害发生趋势预报如下:病虫草害总体发生程度为中等发生,其中虫害、草害偏重发生,病害偏轻发生,部分地区虫害将大发生。 1、麦蚜:大发生,发生面积90万亩次以上,以穗期蚜虫为害为主。主要发生区为顺义、平谷、昌平、通州、大兴、房山等区县。 2、吸浆虫:中等程度发生,局部偏重发生,发生面积40万亩左右,其中房山偏重发生,顺义、怀柔、通州中等发生,大兴、密云偏轻发生。免耕播种的小麦比翻耕播种的小麦发生偏重。 3、白粉病:中等偏轻发生,发生面积20万亩次。感病品种常发区中等发生。
According to the overall occurrence of pests and diseases in Beijing in 2005, combined with the distribution of crop plants in the suburbs of Beijing, the base of pests and winters in autumn and the forecast of the spring of 2006, the trend of main crops, pests and weeds in the suburbs in 2006 is predicted as follows: disease The overall incidence of caterpillar fungus occurred moderately, in which pests, grass-prone occurred more serious disease occurred in some areas pests will occur. 1, wheat aphid: a large occurrence, occurred more than 90 acres of area times, mainly to aphids infestation. The main areas for Shunyi, Pinggu, Changping, Tongzhou, Daxing, Fangshan and other counties. 2, Midge: a moderate degree of occurrence, partial emphasis occurred, the occurrence of an area of 400000 acres, of which Fangshan emphasis occurred, Shunyi, Huairou, Tongzhou medium occurred, Daxing, Miyun partial light. No-till sowed wheat is more stressed than tilled and sown wheat. 3, powdery mildew: Moderate to moderate, occurred area 200000 mus times. Sick susceptible areas occur frequently.