沿黄稻区水稻品种对条纹叶枯病田间抗性鉴定及防治技术研究

在自然发病条件下,调查了沿黄稻区12个主栽品种条纹叶枯病的发病情况。结果表明:新稻18、原稻108、津原101的发病率小于1%,表现为高抗(HR);豫粳6号和黄金晴表现为高感(HS),其中豫粳6号病株率2次调查分别为27.38%、34.03%。控制秧田灰飞虱虫量,对水稻条纹叶枯病具有较好的防治效果。秧田覆盖防虫网并在移栽前使用10%吡虫啉喷雾,防治效果为76.88%~83.30%。秧田使用10%吡虫啉可湿性粉剂与48%毒死蜱乳油混配进行喷雾,防治效果为79.93%~80.54%。增加使用宁南霉素或盐酸吗啉胍喷雾,防治效果没有显著提高,单独使用宁南霉素或盐酸吗啉胍,防治效果低于40%,极显著低于其他处理。

Identification of Rice Cultivar Resistance to Rice Stripe Virus in Rice Production Region along the Yellow River and Study on Control Technique

Rice stripe virus(RSV)incidence of 12 main rice cultivar areas was investigated under natural field conditions.The results indicated that the disease rate of Xindao No.18,Yuandao No.108 and Jinyuan No.101 was less than 1% showing high resistance,Yujing No.6 and Huangjinqing showed high susceptibility with the disease rate of Yujing No.6 reaching 27.38% and 34.03% for two different investigation.Rice strip virus was under good control by limiting SBPH number in rice nursery.The control efficacy was between 76.88% to 83.30% via insect-proof screen and imidacloprid spraying before transplanting,and was between 79.93% to 80.54% via spraying imidacloprid and chlorpyrifos mixture.Combined with ningnanmycin or moroxydine hydrochloride couldn't improve the control efficacy significantly,and the control efficacy was less than 40% by spraying ningnanmycin or moroxydine hydrochloride separately.