8种杀菌剂及复配制剂对油菜根肿病的防效  

Control effects of eight fungicides and their compound combinations against clubroot disease

作　　者：董文静 周游 肖蓉 谢芳玲 舒丽华 向俊 朱宏建[1,2] DONG Wenjing;ZHOU You;XIAO Rong;XIE Fangling;SHU Lihua;XIANG Jun;ZHU Hongjian(College of Plant Protection,Hunan Agricultural University,Changsha 410128,China;Key Laboratory of Biology and Control of Plant Diseases and Insect Pests of Hunan Province,Changsha 410128,China;Hunan Institute of Microbiology,Changsha 410009,China;College of Horticulture,Hunan Agricultural University,Changsha 410128,China;Agricultural Comprehensive Service Center,People's Government of Guanyinge Town,Huaihua,Hunan 419303,China)

机构地区：[1]湖南农业大学植物保护学院,湖南长沙410128 [2]植物病虫害生物学与防控湖南省重点实验室,湖南长沙410128 [3]湖南省微生物研究院,湖南长沙410009 [4]湖南农业大学园艺学院,湖南长沙410128 [5]溆浦县观音阁镇人民政府农业综合服务中心,湖南怀化419303

出　　处：《生物灾害科学》2024年第3期392-398,共7页Biological Disaster Science

摘　　要：【目的】筛选有效防控油菜根肿病的杀菌剂及复配组合,减少农药施用量,科学合理防治根肿病。【方法】以油菜品种沣油737为供试材料,基于室内盆栽试验,采用8种杀菌剂及其部分制剂复配对油菜种子进行药剂拌种。待油菜苗长至5~6真叶时,用灌根法将浓度达1×10^(7)个/mL的根肿菌休眠孢子悬浮液浇至植株根部,从而选取防效较好的药剂组合进行田间防效试验。【结果】8种杀菌剂分别拌种不影响油菜正常生长,其中500 g/L氟啶胺悬浮剂的防治效果最佳,病情指数和防效分别为26.67、67.56%,其余药剂防效由高到低为10%氰霜唑悬浮剂、25 g/L咯菌腈种衣剂、500 g/L甲基硫菌灵悬浮剂、500 g/L多菌灵悬浮剂、440 g/L双炔·百菌清悬浮剂、30%噁霉灵水剂、30%噻唑锌悬浮剂。选取4种防效较高的杀菌剂进行两元复配拌种,结果表明500 g/L氟啶胺悬浮剂+10%氰霜唑悬浮剂(1﹕1)100 mL/kg拌种的防效最佳,室内盆栽试验和大田试验的病情指数分别为17.78和8.89,显著低于清水对照,防治效果分别为79.49%和77.78%。【结论】使用500 g/L氟啶胺悬浮剂、500 g/L氟啶胺悬浮剂+10%氰霜唑悬浮剂(1﹕1)100 mL/kg拌种可以有效预防和减轻油菜根肿病的发生。[Objective]This study aims to screen the effective fungicides and fungicide compound combinations for the prevention and control of clubroot disease,thereby reducing pesticide application and achieving scientific and rational disease management.[Method]The study used the rapeseed variety Fengyou 737 as the test material.Based on the indoor pot test,8 kinds of fungicides and some of their compound combinations were applied to chemical seed dressing.When the rapeseed seedlings grew to 5-6 true leaves,a suspension of resting spores of Plasmodiophora brassicae at a concentration of 1×10^(7)per milliliter was poured to the roots by root irrigation.Then field tests were carried out by selecting the combination of agents with better control effect.[Result]8 kinds of fungicides did not affect the normal growth of rapeseed,among which 500 g/L fluridine SC had the best control effect,with disease index and control effect of 26.67 and 67.56%,respectively.The control effect of other agents from high to low was 10%cyanofrostazole SC,25 g/L roxonil FS,500 g/L thiophanate-methyl SC,500 g/L carbendazol SC,and 440 g/L bispyribacil-chlorothalonil SC,30%oxadiazine AS,and 30%tbispyribac zinc SC.4 fungicides with high control effects were selected for binary combination seed dressing,and 500 g/L fluridine SC+10%cyanofrostazole SC(1﹕1)at 100 mL/kg seed dressing was the best.The disease index of indoor pot test and field test were 17.78 and 8.89,respectively,which were significantly lower than that of the control treatment.The control effects were 79.49%and 77.78%,respectively.[Conclusion]The use of 500 g/L fluridine SC and 500 g/L fluridine SC+10%cyanoformazole SC(1﹕1)100 mL/kg seed dressing can effectively prevent and reduce the occurrence of clubroot disease.

关 键 词：油菜根肿病 杀菌剂 杀菌剂复配 药剂拌种 防效 

分 类 号：S435.654[农业科学—农业昆虫与害虫防治]