【摘要】 栗瘿蜂在北京地区一年发生一代。无雄蜂,营孤雌生殖。以初龄幼虫在栗芽组织内越冬,翌年5月下旬幼虫老熟在虫瘿里化蛹,6月中、下旬羽化,脱孔出蜂,产卵于栗芽内。卵于7月中旬孵化,初孵幼虫先在栗芽组织表面危害,然后形成小虫室越冬。室内药效测定表明,10%六六六乳剂200倍液、50%杀螟松乳剂1000倍液、50%乐果乳剂1000倍液,对刚脱孔和正在咬孔的成虫触杀效果都很好。田间栗树喷药试验结果表明,成虫羽化95%以上时,喷布10%六六六乳剂或超低量油剂,效果良好。冬季剪枝,保留结果母枝和有用发育枝,防虫效果明显。保护及利用自然天敌长尾小蜂是防治栗瘿蜂值得注意的途径。更多还原

【Abstract】 In Beijing suburb,the chestnut gall wasp Dryocosmus kuriphilusYasumatsu has only one generation each year,and overwinters as younglarvae within the host buds.It seems to propagate through parthenogenesis.Next year at the end of May the larvae mature and middle to thepupate in the galls.The emergence of the adult wasps extends from theend of June.The females lay eggs on the buds of the chestnut.Eggshatch in the mid June.The newly hatched larvae at first begin to feedon the bud tissues,afterwards they form cabins and pass throughtheir winter time.The development and degree of damage of the gall wasp depends onthe climatic conditions.Laboratory tests showed that 10% BHC emulsion at a concentrationof 1/200,50% Fenitrothion emulsion at a concentration of 1/1000,50%Dimethoate emulsion at a concentration of 1/1000 would be effective tothe adults.Field tests showed that when 95% of the adult have emerged,spraying10% BHC or the Ultra-lower-volume spray(emulsion)would give goodresult.Pruning away weak branches to strengthen the fruitgenetic branchesand the strong vegetative branches in winter would also give effectivecontrol.To protect and use such a natural enemy as Torymidae would be ahopeful way to control the gall wasps.更多还原