Keywords: Ephestia kuehniella; Life history, parasitism, reproductive and host allocation, Habrobracon hebetor
Paper ID : 1905-24IPPC (R2)
Authors
Fatemeh Koohpayma 1 , Abdoolnabi Bagheri , Hamid Hajebi2 , Hamed Hamed Hassanzadeh Khankahdani3 , Pooran Karimi3 , Seyed Saeid Modarres Najafabadi3
1natural resources of Hormozgan
2Assistant Professor of Hormozgan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Bandar Abbas, Iran
3Hormozgan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Bandar Abbas, Iran
Abstract
Augmentative release of native natural enemies are a prominent strategy for suppression of crop pests. Intrinsic differences among populations of natural enemies may affect their efficiency in pest management programs. We characterized life history traits of 13 climatically and geographically isolated populations of Habrobracon hebetor Say (Hymenoptera: Braconidae) from different regions of Iran to assess their suitability for biological control of noctuid moths. All experiments were performed at 25 ± 1°C, 65 ± 5 RH and 16:8 (L:D) h photoperiod regime. Ephestia kuehniella (Zeller) (Lepidoptera: Pyralidae) was used as a laboratory host. Our results revealed significant variation in female longevity, paralysis and parasitism rate, sex ratio, reproductive rate and host allocation among different H. hebetor populations tested. The highest number of offspring (124.2) and parasitized larvae (160.1) were observed in Bandar Lengeh and the lowest ones was observed in Urmia and Jiroft, respectively (3.4 and 9.3 for Urmia and 3.1 and 10.1 for Jiroft). Also, the wasps of Bandar Lengeh paralyzed up than 95% of the introduced host larvae. The longest female longevity and male production were in Bandar Abbas (21.3 d and 80.1, respectively) and Bandar Lengeh (21.3 d and 80, respectively) and the lowest ones were in Dehloran (12.9 d and 40.2, respectively). Gorgan population deployed the highest number of Ephestia kuehniella larvae in foraging behavior test. These results show deep variation in the life history traits of various populations of H. hebetor, which may affect performance of these populations under field condition
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