Parasitism of Liriomyza trifolii (Diptera: agromyzidae) by Hemiptarsenus zilahisebessi (Hymenoptera: eulophidae) on tomato

Parasitism of Liriomyza trifolii (Diptera: agromyzidae) by Hemiptarsenus zilahisebessi (Hymenoptera: eulophidae) on tomato

2002

A:PS

This study was conducted to investigate percentage of parasitism and control effect of Liriomyza trifolii by Hemiptarsenus zilahisebessi on tomato. Percentages of parasitism on L. trifolii larva by ectopatasitoids were 26~45%. Among them the parasitism by H. zilahisebessi was highest as 47~75% in tomato. The parasitoids preferred 1st to 3rd instar of host larvae. In laboratory test, the parasitoids showed high parasitism on 3rd instar larvae of host by 89.8~93.1% when the female par-asitoids were introduced by the ratios of 1:10, 1:20, and 1:30. In field test, 3 or 5 female parasitoids were introduced per plant. In the case, the parasitism increased to 80% 4 weeks after introduction of the parasitoids. This increased parasitism was resulted from density reduction of the host larvae. There were no significant differences in parasitism, density of alive host, and percentage of damaged leaf between inoculation density.

v.4(1):61-65, KOREAN JOURNAL OF APPLIED ENTOMOLOGY

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