Potential of Trichogramma ostriniae Reared on Eggs of Chionarctia nivea in Control of Ostrinia furnacalis

doi:10.16409/j.cnki.2095-039x.2025.09.017

Abstract

Abstract: This study systematically evaluated the biological characteristics and parasitic capacity of Trichogramma ostriniae reared on three host eggs, Chionarctia nivea, Corcyra cephalonica, and Ostrinia furnacalis. The results demonstrated that C. nivea-reared parasitoids achieved the highest fecundity (169.86 eggs/female), which is significantly higher than that of C. cephalonica-reared parasitoids (141.81 eggs/female) and comparable to that of O. furnacalis-reared parasitoids (171.17 eggs/female). Additionally, C. nivea eggs yielded the highest number of emerged wasps per host egg (2.50 wasps/egg), significantly exceeding both O. furnacalis eggs (1.82 wasps/egg) and C. cephalonica eggs (1.06 wasps/egg). However, this group also showed a significantly higher malformation rate (9.81%). Female wasps of T. ostriniae reared on eggs of C. nivea and O. furnacalis were larger than those reared on eggs of C. cephalonica, male wasps reared on eggs of O. furnacalis were larger than those reared on eggs of C. nivea and C. cephalonica. No significant differences were observed among the three groups in parasitic capacity. In conclusion, while T. ostriniae wasps exhibit varying biological traits depending on the rearing host, C. nivea eggs emerge as a superior alternative to native host (O. furnacalis) for mass rearing, despite the higher malformation rate, followed by C. cephalonica eggs. These findings provide critical insight for optimizing the industrial production of Trichogramma parasitoids to enhance their application in biological control programs.

Key words: Trichogramma ostriniae, Chionarctia nivea eggs, Corcyra cephalonica eggs, Ostrinia furnacalis eggs, biocontrol potential

CLC Number:

S476.3

JIANG Dian, YU Wangbin, HOU Yangyang, ZHANG Qianyu, ZHANG Junjie, DU Wenmei, RUAN Changchun. Potential of Trichogramma ostriniae Reared on Eggs of Chionarctia nivea in Control of Ostrinia furnacalis[J]. Chinese Journal of Biological Control, 2026, 42(2): 381-387.

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