西宁地区槐豆木虱的生物学特性研究

槐豆木虱Cyamophila willieti（Wu）]在西宁地区1年发生2代,以成虫在寄主树皮缝里越冬。翌年3月中、下旬越冬成虫开始活动,4月上、中旬产卵于芽缝间,5月上、中旬出现若虫,若虫5龄,第1代成虫始见于6月上旬,世代重叠,6～7月为第1代成虫发生高峰期,槐豆木虱形成3个成虫高峰期。卵期21d,若虫期43d,雌雄性比为1.05：1.00。

Biological Characteristics of Cyamophila willieti in Xining

Cyamophila willieti reproduced two generations every year in Xining of Qinghai Province,its adult overwintered in the covert place of its host tree cave,and then started its activities in mid and late March next year,the female oviposited in the sprout slit from to mid April,the nymph began to appear from early to mid May and the nymph stage has five instars,the first generation occurred in early June and reached the peak from June to July.The generation overlapping happened.There were 3 peakperiods during ...