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[目的]筛选防治花生网斑病的高效药剂。[方法]采用室内抑菌毒力活性测定与田间防治对比试验相结合的方法,研究评价了12种杀菌剂对花生网斑病菌丝生长及分生孢子萌发的毒力作用及田间对花生网斑病的防治效果。[结果]室内药剂毒力测定结果表明:12种杀菌剂中对菌丝生长毒力最强的2个药剂是50%咯菌腈WP和50%嘧菌环胺WG,其EC_(50)值分别达到0.1824、0.2473 mg/L;12种杀菌剂中对病菌分生孢子毒力最强的2个药剂是25%吡唑醚菌酯EC和66%二氰蒽醌WG,其EC_(50)值分别达到0.0414、0.0478 mg/L。田间防治试验结果表明:12种杀菌剂中对花生网斑病防效最好的药剂处理为50%咯菌腈WP 333.3 mg/L,防效达80.11%,其次是25%吡唑醚菌酯EC1333.3 mg/L处理和50%嘧菌环胺WG 1000 mg/L处理,防效分别为79.14%和77.15%。[结论]50%咯菌腈WP和25%吡唑醚菌酯EC是防治花生网斑病有应用潜力的药剂品种。
[Objective] The research aimed to screen efficient agents for controlling peanut leaf spot. [Method] With the combination of indoor antibacterial activity test and field control experiment, the virulence of 12 fungicides on mycelium growth and conidia germination of Alternanthera philoxeroides were evaluated. Prevention and cure of spot disease. [Result] The results of indoor drug toxicity test showed that among the 12 fungicides, 50% fludioxonil WP and 50% cyprodinil WG had the strongest virulence to mycelial growth, and their EC50 values Respectively, reaching 0.1824 and 0.2473 mg / L, respectively. Among the 12 fungicides, the two most virulent fungi conidia were 25% pyraclostrobin EC and 66% The values reached 0.0414 and 0.0478 mg / L, respectively. The results of field control showed that among the 12 fungicides, 50% fludioxonil WP 333.3 mg / L was the most effective pesticide against perennial net blotch, the control efficacy was 80.11%, followed by 25% pyraclostrobin EC1333.3 mg / L treatment and 50% flucytocamide WG 1000 mg / L treatment, the control effect was 79.14% and 77.15% respectively. [Conclusion] 50% fludioxonil WP and 25% pyraclostrobin EC were potential varieties for controlling perenne net blotch.