Work

Improving the control efficiency of the novel green botanical pesticide toosendanin by optimizing physicochemical properties

Year: 2025

Type: article

Abstract: 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 LC 50 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.

Source: Pest Management Science

DOI: 10.1002/ps.70266

Authors: Hai Li, Wei‐Jia Li, Yuan Huang, Bin Zhang, Yi‐wan Zhou, Zhi‐qing Ma

Institutions: Ministry of Agriculture and Rural Affairs, Yangzhou University, Northwest A&F University

Language: English

Topic: Insect Pest Control Strategies

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDGs: Zero hunger, Responsible consumption and production

Open Access status: bronze

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China