贵阳地区杨梅园黑腹果蝇的田间消长规律

为了摸清贵阳地区黑腹果蝇的发生规律,为其科学防控提供依据,2011年5—8月,采用诱杀剂诱集和采摘杨梅果实调查相结合的方法,对贵阳地区不同时期杨梅果园黑腹果蝇成虫和幼虫的发生规律进行了研究。结果表明:黑腹果蝇的发生数量和杨梅果实的成熟度密切相关,在杨梅成熟前期,黑腹果蝇成虫量处于低谷;当杨梅果实进入成熟采收期,成虫数量随之上升;随着成熟杨梅果实的陆续采收,大量的果蝇幼虫被带出园外,果园里果蝇成虫发生量随之趋于平缓;在采收后期,绝大多数杨梅均已成熟,果蝇的发生量随之上升,形成一个盛发高峰。

The Growth and Decline Rule of Drosophila melanogaster in Waxberry Orchards of Guiyang City

In order to find out the occurrence rule of D.melanogaster and then provide a basis for the prevention and control of the pest,from May to August in 2011,the author studied the occurrence rule of D.melanogaster larvas and adults in different periods in waxberry orchard of Guiyang City by trapping with attractant and collecting waxberry.The results showed that the occurrence quantity of D.melanogaster was closely related to the maturity of waxberry.It meant that before waxberry maturity,the adult number of D.melanogaster were in low ebb,along with waxberry maturity,its adult number began to gradually increase.When the matured fruits were harvested,large number of its larvas escaped from orchard by fruits transportation.Meanwhile,the occurrence number of D.melanogaster adults would tend to be steady.In the later period of waxberry recovery,for most fruits were mature,the pest occurrence number would increase to form a new pinnacle.