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Influence of environmental factors on the occurrence of false smut on rice cultivar Wanxian 98
LIN Yang #,WU Weigang,JIANG Xuxiang,WANG Fei,LUO Chaoxi *
Department of Plant Protection, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070;Department of Plant Protection, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070;Department of Plant Protection, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070;Department of Plant Protection, College of Plant Science and Technology, Huazhong Agricultural U
*Correspondence author
#Submitted by
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Funding: Specialized Research Fund for the Doctoral Program of Higher Education of China Foundation （No.No. 20130146120031）
Opened online:23 June 2017
Accepted by: none
Citation: LIN Yang,WU Weigang,JIANG Xuxiang.Influence of environmental factors on the occurrence of false smut on rice cultivar Wanxian 98[OL]. [23 June 2017] http://en.paper.edu.cn/en_releasepaper/content/4737715
 
 
In order to obtain a more comprehensive understanding of epidemiology of rice false smut, the occurrence of false smut on rice cultivar Wanxian 98 was investigated under different environmental conditions. Results demonstrated that sowing dates significantly affected the occurrence of false smut on cultivar Wanxian 98. Regression analysis indicated that both the higher relative humidity 3 days before heading and lower relative humidity 3 weeks after heading of rice cultivar Wanxian 98 could increase the occurrence of this disease. This is the first report which shows the correlation between occurrence of rice false smut and meteorological factors in experimental fields. In the present study, the increased planting density did not lead to increased severity of rice false smut on rice cultivar Wanxian 98, suggesting that the influence of planting density on the occurrence of false smut might be cultivar specific. The increased planting density has potential risks to increase the severity of rice false smut on cultivars with lower tillering ability rather than on higher tillering cultivars. The enhanced nitrogen application in the early stage did not increase the severity of rice false smut on rice cultivar Wanxian 98, suggesting that nitrogen still can be applied at the early stage of rice growth even under false smut pressure.
Keywords:Plant protection; rice false smut; Villosiclava virens; epidemiology; environmental factors
 
 
 

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