Jiangsu Key Laboratory of Crop Genetics and Physiology and Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China.
College of Plant Science and Technology and the Key Lab of Crop Disease Monitoring & Safety Control in Hubei Province, Huazhong Agricultural University, Wuhan 430070, China.
Plant Dis. 2021 Oct;105(10):3218-3223. doi: 10.1094/PDIS-11-19-2411-RE. Epub 2021 Nov 9.
Rice false smut, caused by the pathogen , is a severe emerging disease in China. It affects not only the quality of rice but also yields of rice production. To make clear the effect of chemical seed treatment on the rice false smut control in fields, during 2014 to 2017, four fungicides with different modes of action were used to treat rice seeds contaminated by false smut balls. In rice-growing seasons, samples of rice tissues were taken for detection of . by using a specific nested PCR method at different rice-growing stages. In addition, the occurrence of rice false smut was investigated at maturation stage. Results showed that . in plant tissues decreased significantly at the seedling stage upon chemical seed treatment. Four chemical treatments decreased the detection rate significantly ( < 0.01) compared with the water treatment, but no significant difference was observed among four chemical treatments. However, the detection rate did not decease significantly at the tillering and booting stages. Similarly, the final occurrence of rice false smut did not show significant difference between each chemical and water treatment. These results suggested that chemical seed treatment had only limited efficacy in preventing occurrence of rice false smut; application of fungicides at the booting stage or integrated use of fungicides and agricultural practices might give a better control for this disease.
稻曲病由病原菌引起，是中国一种严重的新兴疾病。它不仅影响水稻的品质，还影响水稻的产量。为了明确化学种子处理对田间稻曲病控制的效果，在 2014 年至 2017 年期间，使用了四种具有不同作用模式的杀菌剂来处理受稻曲病球污染的水稻种子。在水稻生长季节，在不同的水稻生长阶段，使用特定的嵌套 PCR 方法从水稻组织样本中检测 。此外，在成熟阶段调查稻曲病的发生情况。结果表明，化学种子处理可显著降低苗期植株组织中的 含量。与水处理相比，四种化学处理均显著降低了检测率（<0.01），但四种化学处理之间无显著差异。然而，在分蘖和拔节阶段，检测率并没有显著下降。同样，在每个化学处理和水处理之间，稻曲病的最终发生也没有显著差异。这些结果表明，化学种子处理对防止稻曲病发生的效果有限；在拔节期施用杀菌剂或综合使用杀菌剂和农业措施可能对该病害有更好的控制效果。
