农学学报2016，Vol.6Issue(5)：11-17,7.
江西省晚粳品种对稻曲病的抗性评价及稻曲病药剂防治技术研究
Resistance Evaluation of Late Japonica Rice Varieties Against Rice False Smut in Jiangxi Province and Chemical Control Technology
摘要
Abstract
To screen resistance varieties of late japonica rice with resistance to rice false smut, which are suitable for planting in Jiangxi Province, and fungicides against rice false smut and their application technologies, the resistance of 27 varieties of late japonica rice to rice false smut was identified by natural infection, indoor toxicities of 10 fungicides against rice false smut were assayed by measuring mycelial growth rate, and their efficacies were tested by field trials. Field identification results showed that there were 3 high resistance varieties, 14 resistance varieties, 7 middle resistance varieties, and 3 middle susceptible varieties among the 27 varieties of late japonica rice according to disease panicle rate for resistance evaluation index. Bioassay results showed that the relative toxicity index of the 10 fungicides in inhibiting mycelium growth of rice false smut had an order as fenbuconazole (168.49) > thifluzamide (111.08) > azoxystrobin (107.84) >epoxiconazole (91.68) > difenoconazole · propiconazole (83.47) > tebuconazole (42.34) > prochloraz (21.51)>hexaconazole (12.92)>triadimefon (1.32)>jinggangmycin A (1). The field test revealed that 24%thifluzamide SC, 24%fenbuconazole SC, 12.5%epoxiconazole SC and 25%azoxystrobin SC had better efficacy against rice false smut, followed by 300 g/L difenoconazole · propiconazole EC and 43%tebuconazole SC. The efficacy of the other four fungicides was relatively poor. The efficacy of treatment with spray 7 d before heading was better than that with spray in heading and 7 d after heading. The efficacy of fungicides against rice false smut was improved with the increase of spray times. The result of this study provided a basis for the breeding and application of resistance varieties of late japonica rice in Jiangxi Province and chemical control against rice false smut.关键词
晚粳稻/稻曲病/抗性评价/杀菌剂/防效Key words
Late Japonica Rice/Rice False Smut/Resistance Evaluation/Fungicide/Efficacy分类
农业科技引用本文复制引用
谭景艾,李保同,潘晓华,石庆华..江西省晚粳品种对稻曲病的抗性评价及稻曲病药剂防治技术研究[J].农学学报,2016,6(5):11-17,7.基金项目
国家科技支撑计划课题“鄱阳湖生态经济区绿色高效循环农业技术集成与示范”(2012BAD14B14)，“长江中游南部(江西)双季稻持续丰产技术集成创新与示范”(2011BAD16B04)。 （2012BAD14B14）
