Biotechnology Bulletin ›› 2022, Vol. 38 ›› Issue (11): 220-226.doi: 10.13560/j.cnki.biotech.bull.1985.2022-0691

Previous Articles     Next Articles

Nematicidal Activities Determination of Five Biocontrol Fungi Against Cyst Nematodes

WU Yu-huan1,2,3(), PENG Huan3, GE Feng-yong3, PENG De-liang3(), LIU Da-qun1(), LI Ya-ning1   

  1. 1. Technological Innovation Center for Biological Control of Crop Diseases and Insect Pests of Hebei Province, Agricultural University of Hebei, College of Plant Protection, Baoding 071001
    2. College of Agricultural and Forestry Science and Technology, Hebei North University, Zhangjiakou 075000
    3. State Key Laboratory for Biology of Plant Disease and Pests, Chinese Academy of Agricultural Sciences, Institute of Plant Protection, Beijing 100193
  • Received:2022-06-05 Online:2022-11-26 Published:2022-12-01
  • Contact: PENG De-liang,LIU Da-qun E-mail:nkxwyh@163.com;pengdeliang@caas.cn;liudaqun@caas.cn

Abstract:

In order to enrich the nematicidal fungi resources, the nematicidal activities of Gliocladium roseum JGZ, Purpureocillum lilacinum Y2 and BL2, Trichoderma harzianum L4, Beauveria bassiana BJ against cyst nematodes of Heterodera schachtii(SBCN), Heterodera glycines(SCN), and Heterodera avenae(CCN)were determined in the laboratory. The results showed that the parasitic rates of P. lilacinum Y2, and T. harzianum L4 to cysts were 100%. As the action time increasing, the cyst cuticles were digested and broken. With the increase of dilution rate, the inhibition activities of five strains of fungal fermentations to cyst nematodes decreased. The corrected mortality rates of 5× fermentation broth of T. harzianum L4 to SBCN, SCN, CCN were 96.75%, 95.95% and 96.35%, respectively. The corrected mortality rates of 5× fermentation broth of P. lilacinum Y2 to SBCN, SCN, CCN were 97.37%,95.74% and 97.77% respectively. There were no significant difference between T. harzianum L4 and P. lilacinum Y2. The pot experiment results showed that cyst number treated with the fermentation broth of T. harzianum L4 and P. lilacinum Y2 on SCN for 30 d reduced by 43.67% and 41.87%, respectively. The root length and stem diameter were significantly higher than those by other treatments. The above-ground and under-ground fresh weight treated by T. harzianum L4 was higer than those by other treatments significantly. The biological control effect of T. harzianum L4 was the best, based on the comprehensive evaluation of cyst parasitism rate, nematicidal activity of fermentation broth, the reduction rate of cyst and growth promotion.

Key words: Gliocladium roseum, Purpureocillium lilacinum, Trichoderma harzianum, Beauveria bassiana, cyst nematodes, nematicidal activity