板栗栗红蚧防治试验初报

Preliminary report on several pesticides control of Kermes nawae kuwana

选用 40 %速扑杀乳油、2 5 %敌杀死乳油、40 %氧化乐果乳油、5 0 %甲胺磷乳油、5 0 %敌敌畏乳油、2 0 %三唑磷乳油和 90 %晶体敌百虫等 7种农药对板栗栗红蚧若虫进行防治试验结果表明 ,杀虫效果以 40 %速扑杀 10 0 0倍液的防治效果最好 ,达 91%以上 ;用 2 5 %敌杀死 2 5 0 0倍液 ,40 %氧化乐果、5 0 %甲胺磷 10 0 0倍液 ,5 0 %敌敌畏 80 0倍液 ,效果次之 ,死亡率 70 %～ 84%;而用 2 0 %三唑磷乳油、90 %晶体敌百虫杀虫效果不佳 ,死亡率仅为 42 %。

Kermes nawae Kuwana is a primary-pest damging Castanea mollissima.To control the nymphae of Kermes nawae,seven pesticides were applied and a good result was obtained.Methidathion was sprayed in a 0.04 per cent solution,three applications use made during the egg-stage of nymphae and the killing pest rate reached over 91 per cent.