慣行防除圃場におけるコナガとその寄生蜂の発生動向

概要

論文の詳細を見る
A total of seven parasitoid species emerged from larvae and pupae of the diamondback moth collected in commercial crucierous fields in Miyazaki. Among the parasitoids, Cotesia plutellae (a solitary larval parasitoid), Oomyzus sokolowskii (a gregarious larval-pupal parasitoid), and Diadromus subtilicornis (a solitary pupal parasitoid) were dominant. D.subtilicornis and O.sokolowskii were most common in spring-summer and summer-autumn, respectively. C.plutellae appeared in all seasons except winter. The percentage parasitism by C.plutellae, O.sokolowskii, and D.subtilicornis was about 70%, 50% to 60%, and >40%, respectively, when no or almost no insecticides was sprayed on the cruciferous fields. One to four applications per month of insecticides such as dichlorvos, fenitrothion, fenvalerate, BPMC, and methomyl strongly lowered the parasitoid densities in the fields, but the biotic insecticide, BT, had no effect.
日本応用動物昆虫学会の論文
1999-08-25