8种杀菌剂对水稻细菌性条斑病的防效评价  

Evaluation on the disease control efficacy of eight fungicides against rice bacterial leaf streak

作　　者：冯爱卿[1] 陈深[1] 汪聪颖[1] 杨健源[1] 封金奇 陈凯玲[1] 陈炳[1] 朱小源[1] FENG Ai-qing;CHEN Shen;WANG Cong-ying;YANG Jian-yuan;FENG Jin-qi;CHEN Kai-ling;CHEN Bing;ZHU Xiao-yuan(Plant Protection Research Institute,Guangdong Academy of Agricultural Sciences/Guangdong Provincial Key Laboratory of High Technology for Plant Protection,Guangzhou 510640,China)

机构地区：[1]广东省农业科学院植物保护研究所/广东省植物保护新技术重点实验室,广州510640

出　　处：《南方农业学报》2021年第1期55-62,共8页Journal of Southern Agriculture

基　　金：国家重点研发计划项目(2016YFD0300707,2017YFD0100100);国家水稻产业技术体系专项(CARS-01-32);广东省现代农业产业技术体系专项(2020KJ105)。

摘　　要：【目的】评价8种杀菌剂对水稻细菌性条斑病的田间防效和使用剂量,为水稻细菌性条斑病的防控提供科学依据。【方法】以水稻细菌性条斑病感病品种五山丝苗为试验材料,于五山丝苗处于分蘖期时选用广东地区水稻细菌性条斑病优势强致病型代表菌株GDXc1608进行人工喷雾法接种,分别在接菌后48 h和第1次药后7 d采用喷雾法施药防治,调查第2次药后8种杀菌剂(20%噻唑锌SC、50%氯溴异氰尿酸SP、20%噻菌铜SC、20%叶枯唑WP、5%噻霉酮SC、1.2%辛菌胺醋酸盐AS、3%中生菌素AS和21.4%络铜·柠铜AS)在常规剂量下水稻的病情指数和植株反应,评价各药剂的田间防效及水稻安全性;选取表现较好的4种药剂分别设置3个使用剂量梯度开展盆栽防治试验,筛选目标药剂的最佳使用剂量。【结果】田间防治试验结果显示,8种药剂中以20%噻唑锌SC的防效最好,在使用剂量为450.00mL/ha时对细菌性条斑病的防效为71.81%,其次是21.4%络铜·柠铜AS、20%噻菌铜SC和5%噻霉酮SC,对细菌性条斑病的防效分别为53.50%、52.00%和48.23%,但21.4%络铜·柠铜AS处理水稻植株出现轻微的药害症状;其他药剂防效均较差。药剂使用剂量盆栽筛选试验结果显示,4种药剂随用药量增加对细菌性条斑病的防效均逐渐提高,且各药剂不同剂量间防效均差异显著(P<0.05),其中20%噻唑锌SC在使用剂量375.00~525.00 mL/ha时的防效均在77.00%以上;20%噻菌铜SC在使用剂量375.00~525.00 m L/ha时的防效均在62.00%以上;21.4%络铜·柠铜AS在使用剂量481.50mL/ha时防效为51.83%,其他试验剂量下防效均较低;5%噻霉酮SC在使用剂量37.50和52.50 mL/ha时的防效分别为49.50%和53.15%,使用剂量为22.50 mL/ha时的防效较低。【结论】20%噻唑锌SC对细菌性条斑病的防治效果较好,可作为目前细菌性条斑病田间应急防控的首选药剂;21.4%络铜·柠铜AS、20%噻菌铜SC和5%噻霉酮SC对细菌性条斑病也�【Objective】To select scientific and rational fungicides for the control of rice bacterial leaf streak Xanthomonas oryzae pv.oryzicola(Xoc),the control effect and applied dose of eight fungicides against rice bacterial leaf streak was evaluated.【Method】Rice bacterial leaf streak susceptible rice cultivar Wushansimiao was material.Wushansimiao at tillering stage was inoculated with dominant virulent strain GDXc1608 of rice bacterial leaf streak isolated from Guangdong area by artificial spraying,and then the disease was controlled by spraying 48 h after inoculation and 7 d after the first application,respectively.The disease index and plant responses to eight fungicides(20%zinc thiazole SC,50%chloroisobromine cyanuric acid SP,20%thiodiazole copper SC,20%bismerthiazol WP,5%benzisothiazolinone SC,1.2%xinjunan acetate AS,3%zhongshengmycin AS and 21.4%cuaminosulfate·copper citrate AS)at the recommended dosage were investigated after the second application.The field efficacy and rice safety of each fungicide were evaluated;and selected four fungicides with better performance and set up three dose gradients in field to carry out pot control experiments in order to determine the best application dosage for the selected fungisides.【Result】The results of field trials showed that among the eight fungicides,20%zinc thiazole SC had the best control effect on bacterial leaf streak,with the control effect of 71.81%at the dosage of 450.00 mL/ha,followed by 21.4%cuaminosulfate·copper citrate AS,20%thiodiazole copper SC and 5%benzisothiazolinone SC,the control effects on bacterial leaf streak were 53.50%,52.00%and 48.23%,respectively.However,the rice plants treated with 21.4%cuaminosulfate·copper citrate AS showed slight phytotoxicity symptoms;the other fungicides showed poor efficacy.The results of pot experiment showed that the control effects of four fungicides on bacterial leaf streak increased with the increase of fungicide dosage,and there were significant differences among different fungicide dosages(P<0.05).T

关 键 词：水稻 细菌性条斑病 杀菌剂 防效 

分 类 号：S435.111.49[农业科学—农业昆虫与害虫防治]