Toxicity of 4 kinds of Bio-pesticides to Pathogenic Fungi of Codonopsis pilosula Root Rot Disease
- Received Date: 24/02/2021
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Key words:
- root rot of Codonopsis pilosula /
- biopesticide /
- fungicide /
- toxicity test
Abstract: Root rot of Codonopsis pilosulais a serious fungal disease, which can lead to yield reduction of the crop and affect its economic value. In order to provide reference for the control of this disease, the authors isolated the pathogen of root rot of C. pilosula and identified it as Fusarium solani in their previous work. In this experiment, the antifungal activities of 4 biological pesticides to 2 physiological racesof the pathogen(CQ-4 and CQ-13) were determined with flat plate assay.The results showed that all the 4 pesticides exhibited strong concentration-dependent antifungal activities against CQ-4 and CQ-13.The soluble powder of 28% jinggangmycin had the strongest inhibitory effect on CQ-4, with an EC50 of 0.095 g/L, followed by the aqueous solution of 0.3% tetramycin. The water powder of 10% dobicamycin had the strongest inhibitory effect on CQ-13, with an EC50 of 0.138 g/L, followed by the aqueous solution of 0.3% tetramycin.