Effects of Rainfall in Different Months on Bagged Apple Black-rot Disease
In order to elucidate the effects of rainfall in different months on bagged apple black-rot disease,we studied the incidence of ‘Red Fuji’ apple black-rot disease in Yantai Shandong,Baishui Shanxi and Sanmenxia Henan in 2011,2012,2013.The results showed that the incidence of bagged apple black-rot disease varied in different years.It was the highest in 2011 and the lowest in 2013.The incidence of apple black-rot disease also varied in different areas.It showed that disease incidence gradually reduced from east to west and followed this order:Yantai Shandong ＞ Baishui Shanxi ＞ Sanmenxia Henan.The rainfall in January,April,May and July had negative correlation with the incidence of apple black-rot disease,but the correlations were not significant.The rainfall in other months had positive correlation with the incidence of apple black-rot disease.Especially in September the rainfall significantly affected the incidence of apple black-rot disease,the Pearson correlation coefficient was 0.861(P＜0.01).Pearson correlation coefficient of average rainfall of August and September and the incidence of apple black-rot disease was 0.862(P＜0.01).The rainfall intensity in January,July and October had negative correlation with the incidence of apple black-rot disease.However,there was no associated significance.Rainfall intensity in other months had positive correlation with the incidence of apple black-rot disease.In June,August and September,the rainfall intensity significantly affected the incidence of apple black-rot disease (P＜0.01).Moreover,Pearson correlation coefficient of average rainfall intensity of August and September and the incidence of apple black-rot disease was 0.907(P＜0.01).So the rainfall and rainfall intensity both have significant positive correlation with the incidence of apple black-rot disease in August and September,which were the critical period of the apple black-rot disease control.
apple black-rot diseasedifferent monthsrainfallrainfall intensity
NETL
NSTL
万方数据
维普
