南昌地区豌豆潜叶蝇寄生蜂研究

从南昌地区13种植物的潜叶蝇中,共采到17种寄生蜂。它们均寄生豌豆潜叶蝇的幼虫和蛹,田间自然寄生率第一代平均为13.24％、第二代4.36％,第三代25.65％。在各种寄生蜂中,以潜蝇茧蜂、潜蝇姬小蜂、绿凹面姬小蜂和凹面姬小蜂4种为优势种,占寄生蜂总数的91.9％。除潜蝇姬小蜂外,其它3种6月份以后转株寄生于马蒿、扁豆、萝卜等上的潜叶蝇,秋末冬初又返回豌豆、油菜田间产卵寄生,无明显越冬滞育现象。

STUDIES ON THE PARASITE COMPLEX OF GARDEN PEA LEAF-MINER, PHYTOMYZA HORTICOIA [DIP.:AGROMYZIDAE] IN NANCHANG AREA

A total of 17 hymenopterous parasites were reared out from the larvae and pupae of agromyzid leaf-miners collected from 13 plant species. All of them parasitized Phytomyza horticola. The field parasitization rate of the leaf-miner was 13.24%, 4.36% and 25.65% for the 1st, 2nd, and 3rd generations of the pest, respectively. Four parasite species, opieus sp., Diglyphus isaea, Chrysocharis pehtheus and c. phryne were found to be dominant among the parasite complex, accounted for 91.9% of the total parasites obtained. Except D. isaea, the other three dominant parasites spent part of their life cycles on alternative hosts. After June of each year, they transferred to leaf-miners oh such plants as Caryopteris incana, Dolichos lablab and Raphanus sativus, and returned to the fields of garden pea, Pisium sativum and rape, Brassica campastris in late autumn.The parasites showed no obvious winter diapause.