乌拉草锈病病原菌生物学特性及药剂敏感性  

Biological Characteristics and Fungicides Sensitivity of the Pathogen of Carex meyeriana Kunth Rust

作　　者：史春凤[1] 王天奕 鞠志新[1] 范文忠[1] SHI Chun-feng;WANG Tian-yi;JU Zhi-xin;FAN Wen-zhong(Jilin Agricultutal and Technical College,Jilin 132101,Jilin,China)

机构地区：[1]吉林农业科技学院,吉林吉林132101

出　　处：《农药》2021年第8期606-609,624,共5页Agrochemicals

基　　金：吉林省科技厅项目:乌拉草种质资源评价及人工栽培技术研究(20190301054NY)。

摘　　要：[目的]明确乌拉草锈病病原菌生物学特性及筛选有效防治药剂,为防治提供依据。[方法]采用形态、生物学鉴定,室内生物活性测定与田间药效试验相结合方法。[结果]乌拉草锈病致病菌为柄锈菌属(Puccinia sp.);葡萄糖、硝酸铵、pH值7、12 h/12 h光暗交替、15~20℃适合孢子萌发。氟茚唑菌胺分别与氯氟醚菌唑、吡噻菌胺复配表现为增效,氟茚唑菌胺+氯氟醚菌唑、氟茚唑菌胺+吡噻菌胺以1∶2混配,施药剂量90~120 g a.i./hm2,防效在83%以上。[结论]乌拉草锈病是由柄锈菌属引起的病害,明确了生物学特性,筛选的复配剂有效地控制病害。[Aims] This study aims to investigate the biological characteristics of Carex meyeriana Kunth rust and select effective chemical to control C. meyeriana Kunth rust, and provide a theoretical basis for controlling C.meyeriana Kunth rust. [Methods] Based on morphological characters and biological characteristics, the laboratory experiments and field efficacy trials were conducted to test the toxicity. [Results] The results showed the pathogen was identified as Puccinia sp. The glucose, NH4 NO3, pH=7, 12 h light and 12 h dark conditions, 15-20 ℃ were suitable for spore germination. Fluindapyr combined with mefentrifluconazole, fluindapyr and penthiopyrad had synergistic effect on rust. Furthermore, the field efficacy trials indicated more than 83% control effect with the mixture(1:2) of fluindapyr+mefentrifluconazole and fluindapyr+penthiopyrad at 90-120 g a.i./ha. [Conclusions] The pathogen of rust was caused by Puccinia sp. The biological characteristics of Puccinia sp. were clarified, and the compound agents were selected to effectively control C. meyeriana Kunth rust.

关 键 词：乌拉草锈病 柄锈菌属 杀菌剂 生物活性 田间防效 

分 类 号：S482.2[农业科学—农药学]