近日,山东省植保总站综合各地病虫调查基数、天气预报以及目前大白菜种植和管理情况,对全省大白菜主要病虫害的发生趋势作出如下预报:一、大白菜霜霉病预计2级,局部地区3级。据各监测点9月初调查,大部分地区大白菜霜霉病病株率都在10%以下,其中,莱阳11%、陵城11.2%、邹城6.4%、兖州6%、东阿4.6%、滨州3.5%、兰陵 Recently, the Shandong Provincial Plant Protection Station comprehensive survey of pests and insect pests around the base, the weather forecast and the current planting and management of Chinese cabbage, the main trends of the occurrence of major pests in cabbage to make the following forecast: First, cabbage downy mildew is expected to 2, Area level 3. According to the survey conducted by the monitoring sites in early September, the rate of diseased cabbage downy mildew in most areas was less than 10%, of which 11% in Laiyang, 11.2% in Lingcheng, 6.4% in Zoucheng, 6% in Yanzhou and 4.6% Binzhou 3.5%, Lanling