Isolation of Endophytic Fungi in Rhododendron and Its Control against Tribolium castaneum and Ditylenchus destructor

doi:10.16409/j.cnki.2095-039x.2022.11.027

Abstract

Abstract: Twenty-two strains of endophytic fungi were screened from Rhododendron thymifolium, R. capitatum, R. anthopogonoide, and R. przewalskii using culture isolation method and their insecticidal activities were investigated. The results indicated that crude extracts of LS-Y-2 mycelium showed a better pesticide activity against Tribolium castaneum (LD₅₀＝69.31 μg/adult), crude extracts of LS-Y-2 fungal liquid showed a good bioactivity against T. castaneum (FDI＝84.28%) and Ditylenchus destructor (LC₅₀＝0.06 mg/mL), crude extracts of TH-Z-1 fungal liquid showed an obvious pesticide activity against D. destructor (LC₅₀＝0.07 mg/mL), crude extracts of LS-Y-4 fungal liquid showed a better antifeedant activity against T. castaneum (FDI＝73.12%), crude extracts of LS-Y-4 mycelium showed a better pesticide activity against D. destructor (LC₅₀＝0.18 mg/mL). LS-Y-2 and LS-Y-4 belong to Alternaria, TH-Z-1 belong to Trametes.

Key words: rhododendron, endophytic fungi, crude extracts, Tribolium castaneum, Ditylenchus destructor

CLC Number:

S476

WANG Xudong, LI Qiuyue, WANG Jiali, JI Ying, MA Xiaoqian, LI Yuan, LIANG Junyu. Isolation of Endophytic Fungi in Rhododendron and Its Control against Tribolium castaneum and Ditylenchus destructor[J]. Chinese Journal of Biological Control, 2023, 39(5): 1113-1123.

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