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2023 Volume 2 Issue 1
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LIU Lu, LIU Ming, YANG Lu. Toxicity Evaluation of Different Fungicides to the Pathogen of Osmanthus Gray Spot[J]. PLANT HEALTH AND MEDICINE, 2023, (1): 25-33. doi: 10.13718/j.cnki.zwyx.2023.01.004
Citation: LIU Lu, LIU Ming, YANG Lu. Toxicity Evaluation of Different Fungicides to the Pathogen of Osmanthus Gray Spot[J]. PLANT HEALTH AND MEDICINE, 2023, (1): 25-33. doi: 10.13718/j.cnki.zwyx.2023.01.004
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Toxicity Evaluation of Different Fungicides to the Pathogen of Osmanthus Gray Spot

  • 1. Chongqing Three Gorges Vocational College, Wanzhou Chongqing 404155, China;

  • 2. Chongqing Three Gorges University, Wanzhou Chongqing 404020, China

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  • Received Date: 18/12/2022

  • MSC: S432.4

  • To screen effective and low-toxic fungicides for the prevention and control of gray spot disease of Osmanthus fragrans, and provide research basis for the prevention and control of the disease, the indoor toxicity of 6 chemical pesticides and 5 biological pesticides to the pathogen of Pestalotiopsis scirrofaciens was determined by the mycelial growth rate method. The results showed thatthe inhibitory rates of 11 kinds of pesticides on the growth of the pathogen of Pestalotiopsis scirrofaciens quite different, but the inhibitory effects of chemical pesticides were generally better than the biological pesticides. Among the chemical pesticides, 10% difenoconazole and 500 g/L Isocarburon suspension had the best bacteriostatic effect, with EC50 values of 0.33 μg/mL and 0.52 μg/mL, respectively. The bacteriostatic effect of 50% Chlorobromoisocyanuratewas the worst, EC50was only 117.54 μg/mL.Among biopesticides, 3% tetracycline had a good bacteriostatic effect, with an EC50 value of 40.83 μg/mL. The second was 10 billion spores/gram of Bacillus subtilis, with an EC50 value of 63.73 μg/mL. The worst bacteriostatic effect was 3% Mesobiotin, the EC50was 1,341.60 μg/mL.In agricultural production, 10% difenoconazole, 500 g/L Isocarburon suspension agent, 430 g/L tebuconazole and 300 g/L Benzofeniconazole can be chosen as chemical pesticides to achieve rapid and effective control effect. Biological pesticides control can use 3% tetracycline and 10 billion spores/gram of Bacillus subtilis.
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Toxicity Evaluation of Different Fungicides to the Pathogen of Osmanthus Gray Spot

  • Received Date: 18/12/2022

Abstract: To screen effective and low-toxic fungicides for the prevention and control of gray spot disease of Osmanthus fragrans, and provide research basis for the prevention and control of the disease, the indoor toxicity of 6 chemical pesticides and 5 biological pesticides to the pathogen of Pestalotiopsis scirrofaciens was determined by the mycelial growth rate method. The results showed thatthe inhibitory rates of 11 kinds of pesticides on the growth of the pathogen of Pestalotiopsis scirrofaciens quite different, but the inhibitory effects of chemical pesticides were generally better than the biological pesticides. Among the chemical pesticides, 10% difenoconazole and 500 g/L Isocarburon suspension had the best bacteriostatic effect, with EC50 values of 0.33 μg/mL and 0.52 μg/mL, respectively. The bacteriostatic effect of 50% Chlorobromoisocyanuratewas the worst, EC50was only 117.54 μg/mL.Among biopesticides, 3% tetracycline had a good bacteriostatic effect, with an EC50 value of 40.83 μg/mL. The second was 10 billion spores/gram of Bacillus subtilis, with an EC50 value of 63.73 μg/mL. The worst bacteriostatic effect was 3% Mesobiotin, the EC50was 1,341.60 μg/mL.In agricultural production, 10% difenoconazole, 500 g/L Isocarburon suspension agent, 430 g/L tebuconazole and 300 g/L Benzofeniconazole can be chosen as chemical pesticides to achieve rapid and effective control effect. Biological pesticides control can use 3% tetracycline and 10 billion spores/gram of Bacillus subtilis.

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