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本省目前冬绿肥以紫云英和苕子比较普遍,留种面积也较大,由于留种的生长期长达150-180天左右,复盖度又密,复盖层下较暖而多湿,食料又充足,为许多过冬害虫滋生繁殖创造良好的生态条件。已知的害虫种类有20多种,其中以全省性普遍发生的蓟马和丘陵区的小地老虎以及沙围田地区的斜纹夜蛾,为害至为严重。蓟马吸食子房汁液,造成有花无荚和大量花朵脱落现象,无论紫云英、苕子早、中、迟熟品种,无一幸免,发生数量一般亩达数万至数十万头;小地老虎为害中、迟熟紫云英较多,一般亩密度有数千至数万头,咬断分
At present, the province’s winter green manure is commonly found in the milk vetch and razor clam, leaving a large area for growing species. Due to the growth period of the remaining species is about 150-180 days, the coverage is dense and the cover is warmer and wetter. But also sufficient for breeding breeding pests for many pests to create a good ecological conditions. There are more than 20 species of pests known, of which the thrips of thrips and hilly areas commonly occurring in the province are common and the Spodoptera litura in Shadda district is extremely serious. Thrips ingestion of ovary juice, resulting in a flower without pods and a large number of flowers off phenomenon, regardless of astragalus, prickly heat, middle and late varieties, were spared, the occurrence of the number of general acres of tens of thousands to hundreds of thousands; Little tiger damage, late millet more, the general density of thousands to tens of thousands of acres, bite off points