Use of Trichogramma Phoretic Beauveria bassiana in Control of Asian Corn Borer in Field

doi:10.16409/j.cnki.2095-039x.2019.05.011

Abstract

Abstract: Efficient technology for Trichogramma phoretic microbes is important for improving the bioactivity of Beauveria bassiana against Asian corn borer (ACB). In the present study, the effects of different auxiliaries for absorbing conidia of B. bassiana on the emergence and survival of and conidia amount carried by T. dendrolimi wasps were tested. The results showed no significant effects of auxiliaries and phoretic conidia on the wasps. When 0.1% (w/v) starch solution was used as an adsorbent, the B. bassiana conidia load by T. dendrolimi could be significantly increased to more than 3.6×10⁴ per wasp. An efficient method for T. dendrolimi phoretic B. bassiana (TPB) was established. Control efficiency against ACB using TPB was evaluated in field. Results demonstrated a significantly higher control using TPB than using T. dendrolimi alone. The numbers of ACB damaged plants, boring, and surviving larvae in TPB treatment were reduced by 28.1%, 22.8% and 24.5%, respectively, relative to those in the treatment with T. dendrolimi alone. The number of ACB cadavers in the TPB treatment was significantly higher than in the treatment with T. dendrolimi alone, indicating that TPB had a synergistic control against ACB. In conclusion, the technique of Trichogramma phoretic B. bassiana is highly valuable for control of ACB in field because of its high efficiency, low cost and low labor demand.

Key words: Trichogramma carrying microorganisms, Ostrinia furnacalis, fungal entomopathogens, biocontrol

CLC Number:

S435
S476

YANG Zhi, LU Yang, MAO Gang, ZHAO Yu, ZHANG Qinghe, SUI Li, ZHAO Yu, LI Qiyun, ZHANG Zhengkun. Use of Trichogramma Phoretic Beauveria bassiana in Control of Asian Corn Borer in Field[J]. Chinese Journal Of Biological Control, 2020, 36(1): 52-57.

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