气候因子对山核桃溃疡病发生的影响

通过对山核桃溃疡病病情的广泛调查和定株观察,依据2000年至2004年连续5年气候因子与病害关系的分析,研究了冬季最低温、平均温、降雨量及春季平均温、降雨量对山核桃溃疡病发生的影响。结果显示:极端低温和春季平均温度与病情之间关系不明显。而冬季降雨量与冬季平均温度是病害爆发的主导因子。其趋势是:冬季温度较高,降雨量严重不足,而春季雨水又过多的年份,通常病害发生十分严重。

Effects of Climate Factors on Dothiorella gregaria of Hickory

By extensive investigation and samples observation,based on analysis of relation between Dothiorella gregaria and climate factors from 2000 to 2004,effects of minimum temperature,average temperature and amount of rainfall in the winter,as well as average temperature and amount of rainfall in the spring,on the disease were researched.The results showed that effects of minimum temperature in the winter and average temperature in the spring on it were not remarkable,and the key factors of the disease outbreak were amount of rainfall and minimum temperature in the winter.The disease became sever when temperature was high and amount of rainfall was lower in the winter,and amount of rainfall was excessive in the next spring.