梨白纹羽病菌杀菌剂室内毒力测定及防效分析 Click here to download the full text Citation：王雪倩,李秋颖,杨晓平,张中欢,王利平.梨白纹羽病菌杀菌剂室内毒力测定及防效分析.Journal of Plant Protection,2026,53(4):1054-1061 Hits: Download times: Author Name Affiliation E-mail Wang Xueqian  Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei Province, China    Li Qiuying  Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei Province, China    Yang Xiaoping  Hubei Key Laboratory of Germplasm Innovation and Utilization of Fruit Trees, Institute of Fruit and Tea, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei Province, China    Zhang Zhonghuan  Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei Province, China    Wang Liping  Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei Province, China  wlp09@mail.hzau.edu.cn  中文摘要:为明确防治梨白纹羽病病原菌褐座坚壳菌Rosellinia necatrix的有效化学杀菌剂，采用菌丝生长速率法测定7种杀菌剂对分离自湖北、福建等梨产区的3株褐座坚壳菌强致病力菌株的室内毒力，对筛选出的强致病力菌株HB1-1-15进行盆栽药效试验，并选取250 g/L嘧菌酯SC进行田间防效评价。结果表明：250 g/L嘧菌酯SC对3株供试菌株的平均EC50为0.031 μg/mL，在供试药剂中抑菌活性最强；盆栽试验中，施药28 d后该药剂对梨白纹羽病的相对防效达98.33%；田间试验中，250 g/L嘧菌酯SC 800倍液结合土壤暴晒处理，施药4个月后病害减退率为68.71%，相对防效为57.53%。综上，250 g/L嘧菌酯SC可作为防治梨白纹羽病的候选药剂。 中文关键词:梨  白纹羽病  褐座坚壳菌  杀菌剂  土传病害   Laboratory toxicity of fungicides against pear white root rot pathogen Rosellinia necatrix and their control efficacy Author Name Affiliation E-mail Wang Xueqian  Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei Province, China    Li Qiuying  Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei Province, China    Yang Xiaoping  Hubei Key Laboratory of Germplasm Innovation and Utilization of Fruit Trees, Institute of Fruit and Tea, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei Province, China    Zhang Zhonghuan  Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei Province, China    Wang Liping  Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei Province, China  wlp09@mail.hzau.edu.cn  Abstract:To identify effective chemical fungicides for the control of pear white root rot, the mycelial growth rate method was used to determine the indoor toxicity of seven fungicides against three highly pathogenic strains of Rosellinia necatrix isolated from pear-producing regions including Hubei and Fujian provinces. The highly pathogenic strain HB1-1-15 was selected for pot efficacy tests, and 250 g/L azoxystrobin suspension concentrate (SC) was chosen for field efficacy evaluation. The results showed that 250 g/L azoxystrobin SC exhibited the strongest antifungal activity among the tested fungicides, with an average EC50 of 0.031 μg/mL for the three tested strains. In pot experiments, the relative control efficacy of azoxystrobin SC against pear white root rot reached 98.33% at 28 days post-application. In field trials, the combination of 250 g/L azoxystrobin SC at 800-fold dilution and soil solarization yielded a disease decline rate of 68.71% and a relative control efficacy of 57.53% at four months posttreatment. In conclusion, 250 g/L azoxystrobin SC represents a promising candidate fungicide for the control of pear white root rot. keywords:pear  white root rot  Rosellinia necatrix  fungicide  soil-borne disease View Full Text  View/Add Comment  Download reader

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