Pest management science · 2025
Improving the control efficiency of the novel green botanical pesticide toosendanin by optimizing physicochemical properties.
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Li Hai, Li Wei-Jia, Huang Yuan, Zhang Bin, Zhou Yi-Wan, Ma Zhi-Qing
Аннотация
BACKGROUND: While TSN (toosendanin) has good control efficacy against agricultural pests, rapid degradation hinders its widespread application in the field.
RESULTS: In this study, through the screening and application of various green additives, a novel and environment-friendly TSN 0.5% emulsifiable concentrate (EC) formulation with a long efficacy period and high efficiency against pests was developed using methyl oleate (MO) and azone as adjuvants. The MO-EC formulation exhibited improving permeability, wettability, spreading, and stickiness, along with higher bioactivity and a longer efficacy period, compared with the Xylene-EC formulation. The bioassay results showed that the LC50 values of the MO-EC formulation against Aphis citricola van der Goot, Mythimna separata, and Plutella xylostella (58.11, 85.86, and 66.93 mg L-1, respectively) were lower than those of the Xylene-EC sample (82.66, 148.01, and 109.03 mg L-1, respectively) and the TSN soluble liquid (311.22, 275.93, and 230.93 mg L-1, respectively). Compared with the Xylene-EC formulation and TSN soluble liquid, the MO-EC formulation displayed a higher and longer residual control of approximately 91.32%, 85.71%, and 85.43% against A. citricola van der Goot, M. separata, and P. xylostella, respectively, at 10 days post-treatment with a dosage of 5.25 g A.I hm-2. Compared with the Xylene-EC formulation, the higher bioactivity and longer efficacy period of MO-EC formulation are attributed to optimized physicochemical properties.
CONCLUSION: The MO-EC formulation possesses the potential to serve as a novel and alternative chemical pesticide for sustainable agricultural pest control. © 2025 Society of Chemical Industry.
RESULTS: In this study, through the screening and application of various green additives, a novel and environment-friendly TSN 0.5% emulsifiable concentrate (EC) formulation with a long efficacy period and high efficiency against pests was developed using methyl oleate (MO) and azone as adjuvants. The MO-EC formulation exhibited improving permeability, wettability, spreading, and stickiness, along with higher bioactivity and a longer efficacy period, compared with the Xylene-EC formulation. The bioassay results showed that the LC50 values of the MO-EC formulation against Aphis citricola van der Goot, Mythimna separata, and Plutella xylostella (58.11, 85.86, and 66.93 mg L-1, respectively) were lower than those of the Xylene-EC sample (82.66, 148.01, and 109.03 mg L-1, respectively) and the TSN soluble liquid (311.22, 275.93, and 230.93 mg L-1, respectively). Compared with the Xylene-EC formulation and TSN soluble liquid, the MO-EC formulation displayed a higher and longer residual control of approximately 91.32%, 85.71%, and 85.43% against A. citricola van der Goot, M. separata, and P. xylostella, respectively, at 10 days post-treatment with a dosage of 5.25 g A.I hm-2. Compared with the Xylene-EC formulation, the higher bioactivity and longer efficacy period of MO-EC formulation are attributed to optimized physicochemical properties.
CONCLUSION: The MO-EC formulation possesses the potential to serve as a novel and alternative chemical pesticide for sustainable agricultural pest control. © 2025 Society of Chemical Industry.