摘要
采用菌丝生长速率法测定了闽南地区4个薏米产区72株薏米叶斑病菌对吡唑醚菌酯的敏感性,并通过室内盆栽试验测试了吡唑醚菌酯对薏米叶斑病的防治效果。结果表明:吡唑醚菌酯对供试菌株的EC50值范围为1.11～5.06μg/mL,平均值为(3.44±0.98)μg/mL,且其EC50值频率分布为连续单峰曲线,符合正态分布,因此可将该EC50平均值作为闽南地区薏米叶斑病菌对吡唑醚菌酯的敏感基线。盆栽防效结果表明,喷施有效剂量为250μg/mL的25%吡唑醚菌酯乳油对薏米叶斑病的防治效果(78.2%～79.7%)较好,与喷施有效剂量为500μg/mL的50%异菌脲悬浮剂的防治效果相当,显著高于喷施有效剂量为800μg/mL的80%代森锰锌可湿性粉剂的防治效果。本研究结果为薏米叶斑病化学防治有效药剂的选择与合理使用提供了依据。
Seventy-two Curvularia coicis isolates from 4 regions in South Fujian Province were tested for their sensitivity to pyraclostrobin using mycelial growth method.And the efficacy of pyraclostrobin for the control of Coix leaf blight(CLB)was evaluated under greenhouse conditions.The results indicated that the tested isolates were sensitive to pyraclostrobin.And the EC50 values of these isolates to pyraclostrobin ranged from 1.11μg/mL to 5.06μg/mL,with the mean value of(3.44±0.98)μg/mL.The frequency curve of pyraclostrobin was continuous and unimodal,and following the normal distribution.Hence,the mean EC50 value of(3.44±0.98)μg/mL can be recognized as the baseline sensitivity of C.coicis to pyraclostrobin.Results of pot experiments showed that the spray of 25%pyraclostrobin EC at 250μg a.i./mL exhibited high efficacy for the control of CLB,with the control efficacy ranging from 78.2%to 79.7%.This efficacy was as good as that resulted from the spray of 50%iprodione SC at 500μg a.i./mL,and significantly higher than the efficacy of reference fungicide(80%mancozeb WP at 800μg a.i./mL).This study will guide the reasonable selection of fungicides for effective management of CLB in the future.
作者
代玉立
甘林
阮宏椿
石妞妞
杜宜新
陈福如
杨秀娟
DAI Yuli;GAN Lin;RUAN Hongchun;SHI Niuniu;DU Yixin;CHEN Furu;YANG Xiujuan(Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests/Institute of Plant Protection,Fujian Academy of Agricultural Sciences,Fuzhou 350013,China)
出处
《农药学学报》
CAS
CSCD
北大核心
2019年第2期244-249,共6页
Chinese Journal of Pesticide Science
基金
福建省属公益类科研院所专项(2017R1025-3
2018R1025-1)
国家重点研发计划(2018YFD0200706)
福建省农业科学院青年科技英才百人计划项目(YC2016-4)
福建省农业科学院植物保护创新团队(STIT2017-1-8)
关键词
薏米叶斑病菌
吡唑醚菌酯
敏感基线
薏米叶斑病
防治效果
Curvularia coicis
pyraclostrobin
baseline sensitivity
Coix leaf blight
control efficacy
