据病虫测报站15年观测记载表明,中度偏轻年份发生晚,而为害期短.一般存7月下旬至8月中旬.中度偏重年份发生早,为害期长.一般在7月中旬至8月中旬或者下旬.6月下旬到7月底成为它的波动期,建立种群关系.7月以后为蚜量上升期,5日内蚜量成倍增长,尤其是大发生年份.8月份是高粱蚜的主要为害期,此期正是高粱抽穗、灌浆期.9月上旬由为害寄主转向越冬寄主,此期为迁飞盛期.多年来,我们对冬小麦的丰歉,以及不同年度冬小麦的生长发育之气象条件进行了分析筛选,看出高粱蚜的发生与以下条件非常密切. According to the pest forecasting station 15 years of observation records show that moderate to moderate year occurred late, while the damage period is short. Generally stored in late July to mid August. Moderate emphasis on the year occurred earlier, the damage period is long. Generally in mid-July To mid-August or late June .Through the end of June to the end of July to become the period of its volatility, the establishment of the relationship between populations .After July the amount of aphids increased, the amount of aphids doubled within 5 days, especially in the year .In August is sorghum Aphids of the main period of harm, this period is sorghum heading, filling period .In early September by the host of the victim turned to wintering host, this period for the migration period .For many years, we apologize to winter wheat, as well as different annual winter wheat growth Development of the weather conditions were analyzed and screened, see the occurrence of sorghum aphid and the following conditions are very close.