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Chinese Journal of Biological Control ›› 2022, Vol. 38 ›› Issue (3): 549-554.DOI: 10.16409/j.cnki.2095-039x.2021.07.012

• RESEARCH REPORTS • Previous Articles    

Contact Toxicity of Two Essential Oils Extracted from Ajania against Ditylenchus destructor

XIE Ziyi, LU Peiyu, NING Anqi, LIU Xinying, WANG Junlong, ZHANG Ji, LIANG Junyu   

  1. College of Life Sciences, Northwest Normal University, Lanzhou 730070, China
  • Received:2021-04-30 Published:2022-06-20

Abstract: The control effect of the essential oils extracted from Ajania against Ditylenchus destructor was investigated through testing the nematocidal activity of the essential oils of A. nematoloba and A. nitida and their main components against D. destructor. The two essential oils, eucalyptus and verbenenol, and their mixture were applied separately by the drug immersion method to D. destructor. Results showed that the essential oils of A. nematoloba and A. nitida had certain insecticidal activity against D. destructor, with LC50 of 1.50 mg/mL and 1.23 mg/mL, respectively, at 24 h post treatment, which were significantly lower than that of the positive control carbofuran. At 48 h post treatment, LC50 of the essential oils were 1.06 mg/mL and 0.70 mg/mL, respectively. At 24 h post treatment, the nematocidal activity of eucalyptus oil (LC50=0.49 mg/mL) and verbenenol (LC50=1.09 mg/mL) were stronger than those of the two essential oils. When eucalyptus and verbenenol were mixed at the volume ratios of 2:6, 4:4 and 3:5, the mixtures showed LC50 values of 0.18, 0.17 and 0.20 mg/mL, respectively, indicating a significant synergistic effect. These results indicate that the essential oils and main components extracted from Ajania are of great potential for the green prevention and control of D. destructor.

Key words: Ajania nematoloba, Ajania nitida, eucalyptus, verbenenol, Ditylenchus destructor, insecticidal angelica

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