Urban Entomology Laboratory, Vector Control Research Unit, School of Biological Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia.
J Econ Entomol. 2010 Oct;103(5):1770-4. doi: 10.1603/ec10006.
The objective of this study was to evaluate the suitability of heat- and freeze-killed oothecae of Periplaneta americana (L.) (Dictyoptera: Blattidae) as hosts for parasitoid Aprostocetus hagenowii (Ratzeburg) (Hymenoptera: Eulophidae). The oothecae were subjected to -20, 45, 48, 50, and 55 degrees C at different exposure times (15, 30, 45, and 60 min). The effects of heat- and freeze-killed oothecae on several biological parameters (e.g., parasitism and emergence rates, developmental times, progeny number, and sex ratio) ofA. hagenowii were determined. Embryonic development of 2-d-old oothecae was terminated by either freezing at -20 degrees C or heating at > or = 48 degrees C for > or =30 min. A. hagenowii parasitized live oothecae as well as both heat- and freeze-killed oothecae. Percentage parasitism, emergence rates, and developmental times ofA. hagenowii in both heat- and freeze-killed oothecae were not significantly different from those of the live oothecae. Both heating and freezing did not influence progeny number (male and female) and sex ratio of A. hagenowii emerged from killed oothecae.
本研究旨在评估美洲大蠊（美洲大蠊）热和冻死活卵荚作为寄生蜂 Aprostocetus hagenowii（膜翅目：Eulophidae）宿主的适宜性。将卵荚暴露于-20、45、48、50 和 55°C 下不同时间（15、30、45 和 60 min）。测定热和冻死活卵荚对 A. hagenowii 几个生物学参数（如寄生率和羽化率、发育时间、后代数量和性别比）的影响。通过在-20°C 下冷冻或在>或=48°C 下加热>或=30 min 终止 2 日龄卵荚的胚胎发育。A. hagenowii 寄生活卵荚以及热和冻死活卵荚。A. hagenowii 在热和冻死活卵荚中的寄生率、羽化率和发育时间与活卵荚无显著差异。加热和冷冻均不影响从死亡卵荚中羽化的 A. hagenowii 的后代数量（雄性和雌性）和性别比。
