اثر تراکم میزبان بر پارامترهای جدول زندگی زنبور پارازیتوئید Habrobracon hebetor (Hym.: Braconidae) روی شب‌پره مینوز گوجه‌فرنگی

Tomato (Lycopersicum esculentum) is one of the most important agricultural product in Iran. Tuta absoluta (Lep.: Gelechiidae) has some generations in a year and also a short longevity and high reproductive capacity. Due to the feeding of all four larval instars (neonate larvae), on all stages of tomatoes growth, there are many problems in pest control. Today, due to irreparable effects on the environment caused by the pesticides and the resistance, it seems to be beneficial finding alternatives to using natural enemies, that the family Braconidae parasitoids is one of the most important in IPM. In the current study, the analysis was based on the comparison of Habrobracon hebetor (Hym.: Braconidae) life table parameters related to its hosts at various conditions of host density (daily supply of 1, 3, 5, and 10 full-grown leafminer larvae) at 25±1 oC, 65±5% relative humidity and photoperiod 16:8 (L:D) h were performed. Thirty-five parasite leafminer moth larvae with an egg of parasitoid was monitored until adult appearance. Different density of host larva in 8cm diameter petri-dish were offered to each pair of parasitoid on leaf disk of tomato (in 13 replications for each density). The oviposition rate of the females were recorded until death. The result showed that the developmental time was 12 days. Although the intrinsic rate of increase increased according to host density increased, in 5 and 10 densities there is no significant difference and they are 0.1214±0.0011 and 0.1206±0.0009 female/female/day, respectively. Sex ratio of wasp progeny (females/total) ranged from 0.34 to 0.45. Also the highest parasitism occurred on the 8th day in the first density and in densities of 3, 5 and 10 on the 11th day. The results of this study can be used to improve mass rearing programs and inoculative release applications of H. hebetor against T. absoluta in greenhouse.