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

• 作者: Huang Lin Li Hanguang Li Xnnhang Tu Guoquan Tu Xiaorong
• 来源期刊: Plant Diseases and Pests(植物病虫害研究：英文版)
• 学科: 农学
• 关键词: 水稻稻瘟病 农用抗生素 田间药效试验 穗瘟 超氧化物歧化酶 苯丙氨酸解氨酶 防治效果 水稻产量
• 年，卷（期）: 2016,（5）
• 页码范围: 28-31
• 页数: 4页
• 分类号: S435.111.4

摘要

The control effects of agricultural antibiotic 702( ag-antibiotic 702) on rice leaf blast and panicle blast were evaluated in field trials. With ag-antibiotic702 and the two-line early hybrid rice 287 as test materials,different concentrations of ag-antibiotic 702 liquids were sprayed at tillering 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 polyphenol oxidase( PPO),were measured. Kasugamycin( 45 μg/m L)and deionized water were designed as positive and negative controls. When the concentrations of ag-antibiotic 702 were 15,30 and 45 μg/m L,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 control 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.