荚蒾梢小蠹生物学特性及防治的初步研究

BIOLOGICAL CHARACTERISTICS OF CRYPH-ALUS VIBURNI STARK AND THE PRE-VENTION AND CONTROL

荚蒾梢小蠹(Crypahus viburlni Stark)是危害胡桃楸的重要蛀干害虫。在辽宁清原地区1 a发生1代,以成虫越冬。翌年5月底成虫出蛰侵入新伐倒原未、枝条的韧皮部,并交配产卵。6月上旬出现幼虫,7月中旬为化蛹盛期,7月下旬为羽化盛期。新成虫在活立木的新鲜枝干上补充营养后,于9月下旬开始转移到干基咬芒孔越冬。用3％的敌百虫粉剂或0.2％—0.4％的辛硫磷和氧化乐果乳剂可杀死越冬成虫,防治效果较好。

Cryphalus viburni Stark is a main pest to harm for the stem of Juglans mandshurica in Qingyuan County,Liaoning Province. It reproduces one generation a year and hibernate in adult satate. At the end of May of every year,adults revives and invades into the bases of branches and stems of new felled trees to mate and oviposit. In the first ten days of June,larvas come out of ova,the second and the last ten days of July are pupation and eclosion seasons respectively. After having recruitment of nutrition on the branches and stems of trees, new adults go down to the base of stem to make a hole and hibernate in it during the last ten days of September. Trichlorfon dust of 3％ or phoxim and dimethoate emulsion of 0.2％—0.4％ can kill the hibernating adults and showed better performance on the prevention and control of them.