论文部分内容阅读
麦拟根蚜是为害小麦根际的偶发性害虫。通过三年的田间及实验室研究,发现麦拟根蚜一年完成3—5代,无翅蚜完成一代需要月余,有翅蚜约需50天左右。每年3月下旬或4月初,麦拟根蚜上升至土壤表层为害小麦根部。6月下旬至8月潜入土壤深层休眠,9月份再移至土壤表层为害小麦,11月以无翅成、若蚜或有翅若蚜越冬。麦拟根蚜与草地蚁Tetramorium Caespitum jacoti Wheeler有共生关系,在麦田中扩散及入土越夏、越冬,都必需依靠蚂蚁的帮助。试验结果指出,以40%氧化乐果和50%辛硫磷杀虫效果较好。
Wheat root aphid is the accidental pests that damage wheat rhizosphere. Through three years of field and laboratory studies, it has been found that the root moth aphid finishes 3-5 generations a year, and the finless aphid needs more than a month to complete a generation, and the winged aphid takes about 50 days. In late March or early April each year, wheat aphid rose to soil surface damage wheat roots. In late June to August deep into the soil to sleep, in September and then moved to soil surface damage wheat, in November without wing into, if aphids or winged if aphids wintering. The symbiotic relationship between wheat aphid and Tetramorium Caespitum jacoti Wheeler is a symbiotic relationship between aphids and wheat. In the wheat field, it spreads over the summer and overwinters and must rely on the help of ants. The test results indicate that 40% of omethoate and 50% phoxim insecticidal effect is better.