栀子卷叶螟的发生规律及防治研究

目的:通过对栀子卷叶螟Archernius tropicalis的发生规律及防治研究,为防治提供依据。方法:定点观察和药效试验。结果:该虫在湖北省孝感地区一年发生四代。世代重叠,以幼虫在枯叶中结薄茧越冬,翌年3月恢复取食,4月上旬开始化蛹,4月中、下旬羽化产卵,至6月中旬第一代幼虫发生为害,7月上、中旬至8月中旬为第二代幼虫盛发期,第三代幼虫则于9月上、中旬出现危害至11月上、中旬,第四代幼虫于11月下旬陆续结薄茧进入越冬休眠。选用市售5种药剂试验的结果,只要使用有效浓度在防治适期施药,均能获得90%以上的防治效果。结论:结合栀子卷叶螟的发生规律在其各代幼虫为害期喷施本试验选用的市售5种药剂均能有效防治栀子卷叶螟。

Studies on the Occurrence Regularity and Control of Archernius tropicalis

Objective:To study the occurrence of Archernius tropicalis Walker and control method.Methods: The field investigation and the controlling trial were carried out for the research.Results: A.tropicalis occurred for 4 generations annually in Xiaogan area of Hubei Province.It overwintered as larva inside thin cocoons in the litter,resumed feeding in March next year,and began to pupate in the first 10 days of April.Imagoes and eggs appeared in the second or last 10 days of April,from then to mid-June was the occurrence and injuring period of the first generation larva.Major occurrence period of the second generation larva lasted from the first or second 10 days of July to mid-August,the third generation larva appeared in the first or second 10 days of September and injuring lasted to the first or second 10 days of November,the fourth generation larva(the overwintering generation) making thin cocoons entered the overeintering period of dormancy.The result of five pesticides sold in the market against A.tropicalis in field trial showed that the controlling effect were over 92% when used in proper period.Conclusion: Archernius tropicalis Can be well controlled with the five pesticides sold in the market as long as sprayed in the injuring perido of every generation larva.