【摘要】 为了基本弄清湖南省主要油茶产区茶角胸叶甲Basilepta melanopus Lefevre的发生情况,并寻找有效防治药剂,于2012年5月9日至25日,调查了衡阳地区耒阳市和常宁市油茶林茶角胸叶甲发生情况,并进行了防治试验。结果显示:该虫危害油茶苗圃、1～3年生新造林、成熟林、老龄林与采穗园。以老龄林受害最为严重,株平均密度在40头以上,每枝叶片孔洞数达250个以上,受害株率90%以上;其次为1年生新造林,株平均密度在23头以上,叶片孔洞数平均达到150个/株,受害株率达到75%以上。对新造林危害时间集中在5月17—19日,可致使新造林油茶大量新梢叶片枯黄、掉落。2%噻虫啉微胶囊悬浮剂2 000倍防治效果最佳,不但触杀效果明显,而且持效性较好,1,3,7,10 d校正虫口减退率分别为88.27%,96.55%,100%,100%。更多还原

【Abstract】 In order to grasp the occurrence regularity of Basilepta melanopus Lefevre in main oil camellia production area in Hunan and select suitable pesticides against the pest,experiments were conducted in Camellia oleifera forests in Leiyang and Changning between May 9th and 25th in 2012.The results showed the beetle could cause damage to nursery,new plantation,mature forest,old forest and cutting orchard of oil camellia.Damage to old forest was the most serious.The average population density was above 40 beetles per tree,the holes on leaves reached 250 or more per branch and the attacking rate was above 90%.The damage to 1 year-old plantation was the next.The average density was above 23 beetles per tree,the average number of leave holes reached 150 per tree and the attacking rate was above 75%.The time of damage to earsh was focused on May 17th-19th when the pest could cause many dry yellow leaves on new shoots.The control effect of thiacloprid 2%microcapsule SC at the concentration of 2 000 times was the best.Its quick-acting and lasting effects were better than those of other substitutes.The population density of the beetle reduced by 88.27%,96.55%,100%,100%respectively 1,3,7,10 d after the application.更多还原