中国稻米

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滨海稻区稻瘟病发生动态及田间药效评价

  1. 辽宁省盐碱地利用研究所,辽宁 盘锦 124010
  • 出版日期:2019-03-20 发布日期:2019-03-20
  • 通讯作者: 桑海旭
  • 基金资助:

    国家重点研发计划项目(2016YFD0300703)

Occurrence Dynamics of Rice Blast in Coastal Rice region and Evaluation of its Field Efficacy

  • Online:2019-03-20 Published:2019-03-20

摘要:

为明确辽宁水稻产区稻瘟病发生规律并筛选出高效低毒化学药剂,通过田间小区试验,采用高感品种对3种主栽品种田间诱导发病并进行药效试验。结果表明,不同供试品种的病情指数存在显著差异,盐丰47最高达50.88,盐粳16最低仅为6.14;8月5日—15日为叶瘟发生的关键期;吡唑醚菌酯乳油对稻瘟病的防治效果及增产效果在参试药剂中均最好,肟菌·戊唑醇水分散颗粒剂效果次之。

关键词: 水稻, 稻瘟病, 发生动态, 田间防效

Abstract:

In order to determine the occurrence regularity of rice blast and screen out new high efficiency and low toxicity fungicides, a field trial was conducted with the three main varieties induced by highly susceptible variety. The results showed that there was significant difference in the disease index of 3 tested varieties, in which Yanfeng 47 had the highest disease index(up to 50.88), and Yangeng 16 had the lowest disease index (6.14); August 5th to 15th was the critical period for the occurrence of rice blast; Pyraclostrobin EC had the best control effect on rice blast and increase grain yield, Oxime bacteria Tebuconazole WG was followed.

Key words: rice, rice blast, occurrence dynamics, field control effect

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