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journal1 ›› 2019, Vol. 35 ›› Issue (2): 167-172.DOI: 10.16409/j.cnki.2095-039x.2019.02.001

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Oviposition Preference of Different Trichogramma Strains for Eggs of Conogethes punctiferalis (Guenée)

CHEN Wanbin1,2, HE Kanglai1, WANG Qinying2, WANG Zhenying1   

  1. 1. State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    2. College of Plant Protection, Hebei Agricultural University, Baoding 071001, China
  • Received:2018-11-28 Online:2019-04-08 Published:2019-04-12

Abstract: Yellow peach moth, Conogethes punctiferalis, has became one of the major pests of summer corn ear in Huang-Huai-Hai region in China in recent years. The damage directly reduces the quality and yield of corn. It is difficult to control C. punctiferalis with chemical spray due to the larvae boring into the corn ear. In order to select the suitable Trichogramma strains for control of C. punctifueralis, we compared the parasitism and suitability of eleven strains of T. ostriniae, T. dendrolimi and T. chilonis, which are used widely in biological control of lepidopterous pests, on eggs of C. punctiferalis. The Sd and Xd strains of T. dendrolimi and the So and Zo strains of T. ostriniae showed higher performance than other strains in both choice and non-choice tests. The number of eggs parasitized by Sd, Xd, So and Zo strains was 14.35, 15.05, 14.65, and 13.45 in choice tests, and 15.8, 16.1, 13.8, and 13.1 in non-choice tests, respectively. The emergence rate, female rate of progeny, and the number of progeny per female ranged between 93.64%-98.37%, 73.10%-89.39%, and 13.18-18.40, respectively. Overall, we could draw a conclusion that Sd, Xd, So and Zo could be used as candidates for control of C. puntiferalis in field trial.

Key words: Conogethes punctiferalis, Trichogramma, oviposition preference

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