静岡市におけるゴキブリコバチ Tetrastichus hagenowii (Ratzeburg) のクロゴキブリ卵鞘への寄生調査

概要

論文の詳細を見る
Tetrastichus hagenowii (Ratzeburg) is a small wasp parasitic to the eggs of the cockroaches. The parasitism by T. hagenowii on oothecae of the smoky brown cockroach was investigated in Shizuoka city during 1972 and 1973. Oothecae collected mainly in pigpens and laboratory animal-houses and the cultured ones set in Asabata pigpen for a few weeks were investigated. The results were summarized as follows : 1) The parasitic rate was 48.5-62.3% in the oothecae collected from natural population. The parasitic rates of oothecae collected in pigpens and animal-house were significantly higher than that observed in the other collecting sites. 2) On an average, 35.0% of the oothecae which were set in a pigpen at Asabata was parasitised by T. hagenowii. However this rate was markedly lower than those of the oothecae collected in natural population. The investigation on parasitism by setting cultured oothecae is very useful to study the population dynamics of T. hagenowii in the field. 3) The parasitism of T. hagenowii is gregarious; 59.3 and 2.6 wasps emerged from an ootheca and an embryo, respectively. The average sex ratio was 5 females to 1 male (83.7%).
日本衛生動物学会の論文
1976-04-15