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Synergistic Effect of Orange Oil Adjuvant on Acetamiprid in the Control of Edentatipsylla shanghaiensis

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  • Guangchun Xu

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
    College of Science, China Agricultural University, Beijing 100193, China
    Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China)

  • Dongdong Yan

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Wensheng Fang

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Dejin Xu

    (Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China)

  • Lu Xu

    (Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China)

  • Qiuxia Wang

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Aocheng Cao

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

Abstract

We explore the effects of orange oil adjuvant (a kind of spray adjuvant) on the physicochemical properties of acetamiprid (pesticide) when foliage-applied to the surface of pittosporum tobira leaves. The leaf surface was characterized by the OCG (Van Oss–Chaudhury–Good) method, and the relationship between the wetting behavior of various pesticide droplets, including the change in surface free energy (SFE), adhesion force, and adhesion work, is explored to offer insight into the control of the pittosporum tobira psyllid, Edentatipsylla shanghaiensis Li et Chen. Results showed that SFE values for the adaxial and adaxial leaf surfaces were 40.13 mJ/m 2 and 37.06 mJ/m 2 , respectively, while acetamiprid liquids had SFE values of 67.43 mJ/m 2 and 63.26 mJ/m 2 . SFE values of the acetamiprid liquids are greater than that of the leaf surface, and the droplets on the leaves with a smaller adhesion force and lager adhesion work exhibited moderate-to-poor wettability estimated by contact angles. When the concentration of the orange oil adjuvant was between 0.10% and 1.00% above CMC (critical micellar concentration, 0.09%), the SFE values of the acetamiprid liquids were less than that of the leaf surface. The adhesion tension was greatly increased, and the adhesion work decreased by 14.46–28.13%. Meanwhile, droplets on the leaves exhibited good wettability. Field experiments showed that the synergistic effect of acetamiprid against E. shanghaiensis was significantly improved after spraying with orange oil adjuvant at the concentrations 0.10% and 1.0% above CMC. This study demonstrated the use of an orange oil adjuvant with a concentration above CMC to improve the synergistic effect of the insecticide directly through improved leaf wetting, which can provide reference for reducing pesticide dosage and increasing efficiency during the chemical control of pests.

Suggested Citation

  • Guangchun Xu & Dongdong Yan & Wensheng Fang & Dejin Xu & Lu Xu & Qiuxia Wang & Aocheng Cao, 2023. "Synergistic Effect of Orange Oil Adjuvant on Acetamiprid in the Control of Edentatipsylla shanghaiensis," Sustainability, MDPI, vol. 15(13), pages 1-13, June.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:13:p:10113-:d:1179550
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    References listed on IDEAS

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    1. Xuesong Zhan & Chaofeng Shao & Rong He & Rongguang Shi, 2021. "Evolution and Efficiency Assessment of Pesticide and Fertiliser Inputs to Cultivated Land in China," IJERPH, MDPI, vol. 18(7), pages 1-21, April.
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    1. Yuan Zhong & Ye Jin & Shaoqing Xu & Xiangrui Liu & Jianli Song, 2023. "Efficacy of Two Tank-Mix Adjuvants to Control Mango Thrips Using a UAV Sprayer," Agriculture, MDPI, vol. 13(9), pages 1-15, September.

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