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天牛为害枣树,过去,文献中未见记载。目前,河南新郑枣区,程度不同的发生了天牛为害,平均受害株率24.7％,个别幼龄枣园,被害率高达35％,故此天牛已成为新郑枣区,主要蛀干害虫之一。鉴于上述情况,新郑枣树所作为自选课题组织科技人员攻关,为引起国内枣树界的重视特发表调查初报。一、为害情况成虫多是在地面以上50厘米以内的主干上产卵,幼虫孵化后,在皮层沿韧皮部取食,蛀成道,道内充满木屑(虫粪),随着虫龄增大,逐渐蛀入木质部危害,落叶后,随着气温下降,转入地下10—20厘米的干部或主
Tianjian harm jujube, in the past, the literature did not record. At present, Xinzao jujube district of Henan Province, with different degrees of occurrence of Tian cattle damage, the average victim strain rate of 24.7%, some juvenile jujube, the victimization rate as high as 35%, so Tiannian has become Xinzheng jujube, one of the main pest insects . In view of the above, Xinzheng jujube tree as a subject of scientific and technological personnel to organize research, in order to arouse the attention of the jujube community special investigation report. First, the damage situation Most adults are spawning on the trunk within 50 cm above the ground, the larvae hatch in the cortex along the phloem to feed, Cheng Zhu Road, the road full of sawdust (worm droppings), as the worm age increases, gradually eroded Into xylem hazards, deciduous, with the temperature dropped into the underground 10-20 cm cadres or the Lord