Toxicity Measurement of Different Fungicides to Erwinia amylovorain Laboratory

【Objective】 To screen the types of fungicides that can inhibit Erwinia amylovora in the hope of providing theoretical basis for the prevention and control of diseases caused by Erwinia amylovora. 【Method】 The indoor toxicity of 5 categories and 10 fungicides to Erwinia amylovora was determined using the method of minimum inhibitory concentration (MIC) and bacteriostatic zone. 【Result】 Organic heterocyclic fungicides had the strongest indoor efficacy against Erwinia amylovora, with the EC₅₀ value of 43.148 mg/L, followed by antibiotic fungicides, thiazole fungicides, microbial fungicides and copper fungicides in descending order and the corresponding EC₅₀ value was 87.82,469.50,4,397.20 and 4,782.00 mg/L, respectively. 【Conclusion】 Organic heterocyclic and antibiotic fungicides have good antibacterial effect, which can provide references for the prevention and control of diseases caused by Erwinia amylovora.