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[目的]为桑褐斑病的防治提供理论依据。[方法]采用菌丝生长速率法测定8种杀菌剂对桑褐斑病病菌Septogleum mori Bri et Cav的室内毒力,比较分析桑褐斑病菌对不同杀菌剂的敏感性,并进行药剂的田间防效试验。[结果]300 g/L苯甲·丙环唑EC对桑褐斑病菌的抑菌作用最强,其EC50值为0.014 mg/L;10%苯醚甲环唑WG次之,其EC50值为0.021 mg/L;500 g/L百菌清SC抑菌活性最差,其EC50值为105.677 mg/L。桑褐斑病菌对70%丙森锌WP和80%代森锰锌DP敏感性相对较高,其斜率值为1.886、1.471,其余药剂敏感性相对较低。10%苯醚甲环唑WG、300 g/L苯甲·丙环唑EC田间防效较好(防效为66.225%、67.476%),防效最差的是80%代森锰锌DP(防效为29.12%)。[结论]结合室内和田间试验结果,300 g/L苯甲·丙环唑EC、10%苯醚甲环唑WG、80%戊唑醇WP是防治桑褐斑病有效药剂,可在大田适当轮换使用。
[Objective] The research aimed to provide theoretical basis for the prevention and cure of P. mori. [Method] The indoor toxicity of 8 kinds of fungicides to Septogleum mori Bri et Cav was determined by mycelial growth rate method. The sensitivity of the fungi to different bactericides was compared and tested. Effect test. [Result] The bacteriostatic effect of 300 g / L benzopirone EC was the strongest on M. mori, with EC50 value of 0.014 mg / L. The concentration of 10% difenoconazole WG followed by EC50 was 0.021 mg / L; 500 g / L chlorothalonil SC had the worst antibacterial activity with EC50 of 105.677 mg / L. Morus albus was relatively sensitive to 70% propoxynyl WP and 80% mancozeb DP, with slope values of 1.886 and 1.441, respectively, and the sensitivity of the remaining agents was relatively low. The control effect of 10% difenoconazole WG and 300 g / L benzopirone EC was better (66.225% and 67.476%, respectively), and the worst control effect was 80% mancozeb DP Control effect is 29.12%). [Conclusion] Combining the results of laboratory and field experiments, 300 g / L benzopirone EC, 10% difenoconazole WG and 80% tebuconazole WP were effective agents for the control of mulberry leaf spot, Rotate to use.