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Inhibition effect of biocontrol bacteria NJ13 and its mixture with chemical fungicides against ginseng root rot caused by Fusarium solani / 中国中药杂志
China Journal of Chinese Materia Medica ; (24): 2015-2019, 2019.
Article in Chinese | WPRIM | ID: wpr-773135
ABSTRACT
This study was aimed to clarify the toxicity indoor and inhibition effect of biocontrol strain NJ13 and its mixture with chemical fungicides against Fusarium solani causing ginseng root rot. The method of mycelial growth rate and Sun Yunpei method were used to determine the indoor toxicity and co-toxicity coefficient of strain NJ13 and their mixture with chemical pesticides against F. solani. The dual culture assay method,mixed culture method and microscopic observation were used to determine the sporulation and germination of spores and mycelial growth and morphological change of hyphae of F. solani treated by strain NJ13. The results of toxicity indoor showed that strain NJ13 had the best inhibitory effect on pathogen,and its EC_(50) value was 0. 071 mg·L~(-1). It was all synergistic for antifungal effect that strain NJ13 was mixed with propiconazole and difenoconazole respectively with a range from 1 ∶4 to 4 ∶1( volume ratio). Both of optimal ratios were 1 ∶1,and the co-toxicity coefficients were 848. 70 and 859. 73,respectively. The strain NJ13 could inhibit the sporulation,germination and mycelial growth of F. solani. The biocontrol strain NJ13 had an inhibition effect on F. solani,and the optimal antifungal ratio of strain NJ13 mixed with propiconazole and difenoconazole was obtained.
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Full text: Available Index: WPRIM (Western Pacific) Main subject: Bacteria / Virulence / Plant Roots / Biological Control Agents / Fungicides, Industrial / Fusarium / Panax / Microbiology Language: Chinese Journal: China Journal of Chinese Materia Medica Year: 2019 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Bacteria / Virulence / Plant Roots / Biological Control Agents / Fungicides, Industrial / Fusarium / Panax / Microbiology Language: Chinese Journal: China Journal of Chinese Materia Medica Year: 2019 Type: Article