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Chinese Journal of Biological Control ›› 2022, Vol. 38 ›› Issue (3): 580-586.DOI: 10.16409/j.cnki.2095-039x.2021.11.003

• RESEARCH REPORTS • Previous Articles    

Biological Activities of Garlic Root Exudates on Myzus persicae (Hemiptera: Aphididae)

WU Xiaoting1, LAI Rongquan1, GU Gang2, MI Yuee1, HAN Meng1, ZHANG Bang1, ZENG Wenlong3   

  1. 1. State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
    2. Fujian Province Corporation of China National Tobacco Corporation, Fuzhou 350003, China;
    3. Fujian Tobacco Company Longyan Company, Longyan 364000, China
  • Received:2021-05-10 Published:2022-06-20

Abstract: The deterrent activity and contact toxicity of garlic root exudates and its four components (dibutyl phthalate, 2,6-diisopropylphenol, diallyl disulfide and 2,6-di-tert-butyl-p-cresol) on Myzus persicae were determined by leaf smear method and drop method, respectively for analysis of the control effect of the root exudates against M. persicae in intercropping ecosystem in tobacco fields. At 72 h post treatment with 4 g/mL garlic root exudates, significant deterrent activity between 75.93% and 80.56% and contact toxicity between 92.22% and 96.67% were observed. Additionally, the four components of garlic root exudates had significant deterrent activity or contact toxicity against M. persicae. 2,6-Diisopropyl phenol had the best deterrent effect (93.65%-100.00%) against M. persicae. Dibutyl phthalate and 2,6-diisopropyl phenol showed high contact toxicities between 83.33% and 92.22%. The four components of garlic root exudates ranked in deterrent activities against M. persicae from high to low were 2,6-diisopropylphenol, diallyl disulfide, dibutyl phthalate, and 2,6-di-tert-butyl-p-cresol, and ranked in contact toxicity, were 2,6-diisopropylphenol, dibutyl phthalate, 2,6-di-tert-butyl-p-cresol, and diallyl disulfide. The results show that garlic root exudates and its components have significant deterrent activity and contact toxicity on M. persicae, which can promote the development of plant protection agents with garlic root exudates and intercropping garlic for preventing and controlling M. persicae in fields.

Key words: garlic, root exudates, Myzus persicae, deterrent effect, toxic effect

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