梨锈病病菌生态位研究

Niche breadth of Gymnosporangium haraeanum.

安徽主栽梨树品种对锈病菌的抗性差异显著 ,而对感病品种以病情指数和病叶数为依据的锈菌寄主生态位进行研究 ,结果生态位宽度依次是 0 .75 5 5和 0 .795 1;各品种水平空间和垂直空间生态位宽度均接近于1.此研究表明梨锈病菌是以随机扩散传播侵染的 .

The resistant difference among different main pear cultivars in Anhui Province to pear rust caused by Gymnosporangium haraeanum was significant. According to disease index and diseased leaves of susceptible cultivars, the niche breadths of hosts were 0.7555 and 0.7951 , respectively. The niche breadths of horizontal and vertical space of each cultivar were approximate to 1. The result shows that the infection of G. haraeanum was a random distribution.