Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (6): 142-146.doi: 10.11924/j.issn.1000-6850.casb14100099

Previous Articles     Next Articles

Identification of the Pathogens of Wolfberry Hardwood Cuttings Mildew and Comparison of Virulence Pharmacy

Li Zhaoyu1,2, Liu Yonggang2, Zhang Xinrui2, Shen Peizeng3, Li Jiajia1,2, Zhang Haiying2, Guan Canzheng3   

  1. (1Department of Plant Pathology, Gansu Agricultural University, Lanzhou 730070;2Institute of Plant Protection, Gansu Academy of Agricultural Sciences, Lanzhou 730070;3Baiyin City Agricultural Technology Service Center, Baiyin Gansu 730900)
  • Received:2014-10-24 Revised:2015-02-06 Accepted:2014-12-25 Online:2015-03-20 Published:2015-03-20

Abstract: In order to identify the pathogen and provide effective disease control, the pathogen was isolated and identified, the pathogenicity test and return inoculation experiments were made for the pathogen causing wolfberry cuttings mildew in temperature control of root nursery. The effective fungicides for the main pathogens were also screened in the laboratory. The results showed that: the effective fungicides were Trichotheciumroseum Lk. ex Fr, Alternaria alternate (Fr.) Keissler and Rhizopusnigricans (Ehrenberg) Vuill. Their separation frequencies were 14.14%, 26.26% and 58.59%, respectively. The return inoculation mildew rates of the three fungicides were 100%. Their germination rates were 25%, 5% and 50%, respectively. Fungicide virulence test result showed that the inhibition rates of flusilazole (40?) were good for Rhizopusnigricans (Ehrenberg) Vuill, and the inhibition rates of flusilazole (40?) of 6000-fold and 8000-fold both were 100% for Alternaria alternate (Fr.) Keissler; the inhibition rates of difenoconazole (25?) of 1000-fold were 83.19%, 82.35%, 80.09% for Rhizopusnigricans (Ehrenberg) Vuill, Alternaria alternate (Fr.) Keissler and Trichotheciumroseum Lk. ex Fr.. The results may provide a reference for the reduction of diseases of wolfberry hardwood cuttings and the improvement of the rate of seedling.