论文部分内容阅读
2008年至2009年对西双版纳阳春砂仁叶斑病田间发病情况进行了调查,结果显示,叶斑病是云南阳春砂仁叶片上的主要病害之一。其发病规律及特点:10月初发病,1月为发病高峰,8月发病较低;具有冬季发病重,夏季发病轻的特点。影响田间发病的因素有气温、降雨量、种植密度、环境、品种等,对3个砂仁基地进行月均温、月降雨量与田间病情指数相关性分析表明,田间病情指数与月均温的相关性系数R2=0.8413,与降雨量的相关性系数R2=0.9358,即气温在10～30℃,降雨量在10～250 mm,气温越高降雨越多田间叶斑病发病指数越低,即呈负相关关系。
From 2008 to 2009, the incidence of spring leaf spot of Amomum villosum in Xishuangbanna was investigated. The results showed that leaf spot was one of the main diseases on the leaf of Amomum villosum in Yunnan. The incidence of the law and characteristics: the onset in early October, peaked in January, August incidence is low; with severe winter onset, mild onset of summer features. The factors influencing the field incidence were temperature, rainfall, planting density, environment and variety. The correlation analysis between monthly mean temperature and monthly rainfall and field disease index showed that the field condition index was positively correlated with the average monthly temperature The coefficient of correlation R2 = 0.8413, and the correlation coefficient R2 = 0.9358 with rainfall, that is, the temperature is between 10 and 30 ℃ and the rainfall is between 10 and 250 mm. The higher the temperature, the lower the rainfall. The lower the index of leaf spot disease incidence is A negative correlation.