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Chinese Journal of Biological Control ›› 2025, Vol. 41 ›› Issue (5): 1078-1086.DOI: 10.16409/j.cnki.2095-039x.2025.11.001

• RESEARCH REPORTS • Previous Articles    

Control of Adults of Myllocerinus aurolineatus Voss by Combining Beauveria bassiana with Reduced Pesticide

LI Huiling, LIU Fengjing, LI Jinyu, ZHANG Hui, LI Liangde, WANG Dingfeng   

  1. Tea Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
  • Received:2024-07-29 Published:2025-10-22

Abstract: This study aimed to investigate the efficiency of Beauveria bassiana in conjunction with a reduced pesticide in controlling the adult population of Myllocerinus aurolineatus Voss, employing a potted plant experiment and a field experiment by using 100 billion spores/g Bb338 of wettable powder, 1.3% soluble matrine, and 25g/L bifenthrin EC. Among the six biocontrol fungi, Bb338 had the highest toxicity to the weevil with the shortest LT50 value (4.005 d) and the highest corrected mortality (100%) at 8 d post treatment. The potted plant experiment showed that the control efficiency of Bb338 combined with 50%-reduced matrine was 20.00% and 17.58% higher than that of Bb338 alone at 3 d and 5 d post treatment, respectively, similar to that of 25%-reduced matrine alone but higher than that of 75%-reduced matrine alone. The control efficiency of Bb338 combined with 75%-reduced bifenthrin EC was 95.06% at 10 days post treatment, higher than that of Bb338 alone. The field experiment showed that the control of Bb338 combined with 50 g/L bifenthrin EC was the highest at 3 days post treatment, higher than that of Bb338 alone and Bb338 combined with 50%-reduced matrine. At 25 days post treatment, the control of Bb338 combined with 50%-reduced matrine was the highest (67.70%). The combined applications of Bb338 and matrine or bifenthrin have significant synergistic effects on M. aurolineatus.

Key words: Myllocerinus aurolineatus, Beauveria bassiana, matrine, bifenthrin, pesticide reduction

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