论文部分内容阅读
河南省菜蚜主要有菜缢管蚜和桃蚜两种。菜缢管蚜主要危害萝卜、白菜等;桃蚜还危害马铃薯、烟草及蔷薇科果树等。蚜虫以成、若蚜聚集在近地面的叶背上吸食汁液。 菜缢管蚜于秋季9~11月危害最为严重。在气温15~26℃、相对湿度在70%以下时,最有利于发生,在较低温度下发育也较快。桃蚜夏季严重,10~11月迁回桃树繁殖,在气温达24℃时发育最快,高于28℃则对蚜虫不利;相对
Vegetable aphids in Henan Province, there are vegetables and pipe aphids Myzus persicae two kinds. Vegetables 缢 tube aphid major hazards radish, cabbage, etc .; peach aphid also endangered potato, tobacco and rose family fruit trees. Aphids to become, if the aphids gathered in the ground near the leaf to drink juice. Aphis gossypii in the fall from September to November the most serious harm. In the temperature of 15 ~ 26 ℃, relative humidity below 70%, the most conducive to the occurrence of rapid development at lower temperatures. Myzus persicaensis are severe in summer, and migrate back to peach trees from October to November, and develop fastest when the temperature reaches 24 ℃, while aphids are unfavorable when the temperature is higher than 28 ℃.