山西枣树新害虫——枣绮夜蛾的研究

枣绮夜蛾 Porphyrinia Parva(H(?)bnet)是山西省枣树上的一种新害虫。以幼虫主要食害枣花、蕾和果实,偶尔也食枣叶。在山西一年发生1—2代,以蛹在树干粗皮裂缝及树洞中越冬。6月份为田间幼虫为害盛期,造成大量落蕾、落花、落果。几年来,我们在晋中枣区根据各虫态的生物学特性,在做好虫情测报的基础上,采用刮树皮、束草诱杀及树上喷药相结合的综合防治措施,取得了较好的防治效果。

STUDY ON A NEW-PEST IN SHANXI——Porphyrinia parva(H(?)bner)

Porphyrinia parva(Hübner)is a new pest of jujube trees in Shanxi Province.It mainly a tracts the buds,flowers and young fruits of jujube trees at the larval stage.Occasionally the foliage of the hosts also is damaged.The greatest numbers of larvae are found in June,and the most serious infestation occurs during this period.A large number of the buds, flowers,and young fruits are ruined.P.parva has 1—2 generations per year in Shanxi.It passes the winter at the pupal stage in the bark crevices and cavities on the trunk and limbs of the hosts.The biological character istics of every life stage P.parva have been surveyed.Based on the forecasting of its situation,it has been successfully controlled by trapping with a sheaf of straw around the trunk of the hosts,scraping the old bark.and spraying the trees with insecticides in the Jinzhong District of Shanxi Province dur- ing the past few years.