摘要
红脂大小蠹在吕梁地区主要以老熟幼虫、成虫、少量蛹在油松根部越冬 ,1年发生 1代。主要以幼虫 ,其次是成虫取食韧皮部后 ,切断树木水分和养分通道而致树木死亡。越冬成虫于 5月中旬进入扬飞盛期 ,第一代成虫于 8月中旬进入扬飞盛期。以上两个阶段成虫钻出树皮在野外寻求新的寄主时 ,是防治的最佳时期。经试验 ,在树木基部 10～ 16cm周围的土层内挖 4个孔 ,孔深 2 0～30cm ,每孔内放 1～ 2片磷化铝片剂 ,用土掩埋踏实可熏杀根部害虫。
In luliang prefecture RTB overwinter in form of aged larva,the adult and pupa in root section.RTB has one generation in each year.RTB larva and adult eat at bast layer to cut water and nutrient supply which results death of the trees.Those overwintered larva come into flying period in May and into full flying period in August.In May and August the adult RTB leave trees to look for new hosttrees in open field.Hence it is a good time for RTB's control.The experiment result suggests that to fumigate RTB in root section,4 holes of 20～30cm deep are dug around tree basement in 10～16cm range.In each hole 1～2 tablets of aluminium are put into and then covered with soil.
出处
《山西农业科学》
2002年第3期66-69,共4页
Journal of Shanxi Agricultural Sciences
