Preventive and Therapeutic Effects of New Fungicides on Rice Blast  

作　　者：Jinqi FENG Aiqing FENG Xiaoyuan ZHU Jianyuan YANG Shen CHEN Jing SU 

机构地区：[1]Plant Protection Research Institute,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China

出　　处：《Asian Agricultural Research》2023年第6期33-35,共3页亚洲农业研究（英文）

基　　金：Agricultural Science and Technology Development and Resource and Environmental Protection Management Fund of Guangdong Provincial Rural Revitalization Strategy Project(2022KJ153-06);Special Fund for China Agricultural Industry Research System(CARS-01-32,2022KJ105);"The 14 th Five-Year Plan"New Discipline Team Building Project of Guangdong Academy of Agricultural Sciences(202116TD);Science and Technology Plan Project of Shaoguan(210804164531395).

摘　　要：[Objectives]The paper was to identify the characteristics and the potency of new fungicides to rice blast disease,and study their preventive and therapeutic effects on the disease.[Methods]Six new and conventional fungicides with different mechanisms of action were selected to compare their preventive and therapeutic effects on rice seedling blast in greenhouse.[Results]The agents which showed to be highly efficacious in blast prevention(greater than 90%)were 25%pyraclostrobin EC,20%fenoxanil SC,75%tricyclazole WP and 50%prochloraz-manganese WP sprayed at the dosages of 112.5-150,180-360,270-450 and 450-600 g/ha,respectively.The therapeutic effect of new fungicides 25%pyraclostrobin EC and 50%prochloraz-manganese WP on rice blast were above 90%when the dosages were 90-150 and 360-600 g/ha,respectively.The therapeutic effect of the conventional fungicide 40%isoprothiolane EC on rice blast was 69.04%when the dosage was 480 g/ha,while those of other fungicides were worse.[Conclusions]Both 25%pyraclostrobin EC and 50%prochloraz-manganese WP have good preventive and therapeutic effects on rice blast,which will provide a reference for the use of these fungicides in the field.

关 键 词：Rice blast FUNGICIDE Preventive effect Therapeutic effect 

分 类 号：S435.111.41[农业科学—农业昆虫与害虫防治]