Investigation on the Occurrence of Apple Canker in Different Habitats
The occurrence of apple canker was investigated in four apple producing areas, including Yanyuan and Maoxian of Sichuan Province , Linzhi and Changdu of Tibet, and its correlation with tree age, variety, site conditions, season and climatic factor was analyzed. The results showed that the more seriously canker occurred with the increase of tree age, the resistance of Golden Delicious to canker was the worst, nevertheless, the resistance of Red General was better. The soil was heavier, the occurrence of canker was earlier as the roots of plants were poorly developed, the apple tree on sunny slope were more likely to occur canker than that on the shady slope, compared with other producing areas, more seriously canker occurred in Yanyuan region of Sichuan Province and Linzhi region of Tibet, and there was two maximum occurrence of canker during its growing season.
国家科技期刊平台
NSTL
万方数据
维普
