【摘要】 杉针黄叶甲XanthoniacollarisChen主要危害云杉 ,在甘南州一年发生 1代 ,以老熟幼虫在树冠下 30～ 5 0cm的土壤内越冬 ,翌年 5月中上旬化蛹 ,7月初开始羽化 ;7月下旬开始产卵 ,8月中旬卵开始孵化。成虫喜阳光 ,有假死性 ,幼虫喜阴湿。用 5 0 %甲基异柳磷或 2 5 %增效辛硫磷喷雾防治成虫 ,杀虫率在 90 %以上。更多还原

【Abstract】 Xanthonia collaris attacks spruce.It has one generation a year in Gannan area and overwinters as mature larva in the soil at a depth of 30～50cm under tree crown.It pupates in mid and late May the next year.The adult emerges in early July and lays eggs in the last ten days of July.Larva appears in mid August.The adult is phototactic and larva likes dankness.Spray of 50% Isofenphos methyl or 25% Phoxim can kill 90% of the pest.更多还原