Field Efficacy of Agricultural Antibiotic 702 against Rice Leaf Blast and Panicle Blast

The control effects of agricultural antibiotic 702 （ ag-antibiotic 702） on rice leaf blast and panicle blast were evaluated in field trials. With ag-antibiotic 702 and the two-line early hybrid rice 287 as test materials, different concentrations of ag-antibiotic 702 liquids were sprayed at tiUering...

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Published in:Plant Diseases and Pests(植物病虫害研究：英文版) 2016-12, Vol.7 (5), p.28-31
Main Authors: Xunhang, Li, Xiaorong, Tu, Lin, Huang, Hanguang, Li, Guoquan, Tu
Format: Article
Language:English
Subjects:
农用抗生素
水稻产量
水稻稻瘟病
田间药效试验
穗瘟
苯丙氨酸解氨酶
超氧化物歧化酶
防治效果
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Summary:The control effects of agricultural antibiotic 702 （ ag-antibiotic 702） on rice leaf blast and panicle blast were evaluated in field trials. With ag-antibiotic 702 and the two-line early hybrid rice 287 as test materials, different concentrations of ag-antibiotic 702 liquids were sprayed at tiUering stage and full heading stage of rice. In leaf blast test, the disease indexes of leaf blast at tillering stage were surveyed at 1 d prior to the first spraying and at 15 d post spraying, respectively. The disease indexes （DI） and the rice yield in panicle blast test was investigated at milky stage. Meanwhile, enzyme activities, including peroxidase （ POD）, catalase （CAT）, superoxide dismutase （SOD）, phenylalanine ammonia-lyase （PAL）, and polyphanol oxidase （PPO）, were measured. Kasugamycin （45 μg/mL） and deionized water were designed as positive and negative controls. When the concentrations of ag-antibiotie 702 were 15, 30 and 45 μg/mL, the control effects against leaf blast were 72.14%, 80.32% and 85.22%, respectively; the control effects on panicle blast were 74.08%, 84.87% and 86.58%, respectively; and the yield increase rates were 17.28%, 21.40% and 22.57%, respectively. So, ag-antibiotic 702, as a new agricultural antibiotic fungicide, could effectively cantrel rice blast by inducing defensive enzymes, and increase rice yield. The results will contribute to further development of ag-antibiotic 702 and its application in rice blast control.
ISSN:2152-3932