打孔注药法防治香樟齿喙象幼虫防效试验

Control efficacy of using trunk injection method against the larva of Pagiophloeus tsushimanus

香樟齿喙象Pagiophloeus tsushimanus是上海地区危害香樟Cinnamomum camphora的主要害虫之一,该虫主要以幼虫钻蛀香樟主干为害,而传统喷雾防治方法对幼虫防治效果不佳,本文选用打孔注药法针对香樟齿喙象幼虫开展防治,选择10%甲维吡虫啉可溶液剂、1.8%阿维菌素乳油和4.5%高效氯氰菊酯乳油3种农药,每种农药分别配比为原液、5倍、10倍3个浓度梯度,对受害香樟树进行注干防治,针对各处理组连续统计8周防效,通过试验了解不同农药不同浓度对香樟齿喙象的防治效果。试验结果显示防治后8周,10%甲维吡虫啉可溶液剂原液防治效果最好,为77.27%;防效最差为4.5%高效氯氰菊酯乳油10倍液,为46%。

Pagiophloeus tsushimanus is one of the major pests that harms Cinnamomum camphora in Shanghai and the traditional spraying method did not have effective control effect. The author used trunk injection method and chose Emamectin ＋ Imidacloprid 10% SL, Abamectin 1.8% EC and Beta- cypermethrin 4.5% EC with the concentration of undiluted,5 times diluted and 10 times diluted to re- search the efficacy. The result showed that after eight weeks,Emamectin ＋ Imidacloprid 10% SL undi- luted concentration had the best efficacy on Pagiophloeus tsushimanus, with control effect being 77.27%. The worst one was 10 times diluted Beta-cypermethrin 4.5% EC with control effect of 46%.