貯存溫度與時間對底比斯釉小蜂(Chrysocharis pentheus (Walker))（膜翅目：釉小蜂科）之影響

Abstract

Chrysocharis pentheus (Walker) is one of the dominant species in the parasitoid complex of Liriomyza sativae Blanchard in Taiwan. In an attempt to increase the availability of biological control by using C. pentheus, we investigated the influence of storage temperature and duration on this wasp. The results of our investigation showed that there was no significant difference in the percent emergence between 0-day-old pupae stored at 7 and 10℃ for 1 and 1~2 weeks, respectively (% emergences of 95.1 and 92.1-96.0%) and the control (% emergence of 98.8%). The host-killing capability and offspring production using pupae stored at 7 and 10℃ for 1 and 1-5 weeks and then reared at 25℃ with host (L. sativae) and honey had decreased by 79.3-96.4% and 86.8-98.6%, respectively, when compared to the control. Adults (0-day-old) were fed only with honey at 15 and 25℃ for various periods for the study of storage conditions. After the end of the storage periods, wasps were kept at 25℃ with both hosts and honey to evaluate their capability for host-killing and offspring production. The results revealed that host-killing capability and total offspring production significantly decreased by 62.3-79.6% and 73.6-90.9% when the adult wasps were stored at 15℃ for 10~40 days and 25℃ for 10 days, respectively. Daily oviposition and host-feeding patterns of all treated females were different from the control. Since C. pentheus isn't suitable for storage and the wasps need to be stored in the process of propagation or release, we suggest that better storage conditions are 0-day-old adults fed with honey at 15 and 25℃ for 10~40 and 10 days, respectively.