Control Efficiency of Habrobracon hebetor Say against Ephestia cautella

doi:10.16409/j.cnki.2095-039x.2021.05.017

Abstract

Abstract: The control efficiency of the parasitoid wasp Habrobracon hebetor Say against Ephestia cautella was evaluated at 30 ℃ and 75% relative humidity through establishing functional reaction of different generations of H. hebetor (the 1st, 20th, 40th, and 80th generation reared on E. cautella) to E. cautella and measuring the actual control ability and sustainable control potential of H. hebetor against the larvae of E. cautella in a storehouse. The results showed that the functional response of H. hebetor to E. cautella fitted with the Holling Ⅱ model. And the H. hebetor wasps reared on E. cautella larvae differed significantly in parasitic capacity between different generations. The laboratory experiments showed that, with the increase of host density, paralysis of E. cautella by H. hebetor females gradually increased, parasitism rate did not change, and the searching efficiency gradually decreased. The storehouse experiments showed that, with one release point in a storehouse of 39.5 m×14.7 m×2.7 m (length×width×height), the wasps parasitized all the larvae (720 larvae) in the space within 3 days. The results show that H. hebetor has great potential in controlling E. cautella and has a good prospect of development and utilization in the green prevention and control of the pest in food processing sites and storage environment.

Key words: Habrobracon hebetor, function response, Ephestia cautella, control ability

CLC Number:

S476.3

GUO Chao, LU Yujie, HE Mengting, WANG Zhiying, WANG Wenfang, HUANG Yong, WANG Rui, Lü Jianhua. Control Efficiency of Habrobracon hebetor Say against Ephestia cautella[J]. Chinese Journal of Biological Control, 2021, 37(6): 1197-1203.

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