不同生境下苹果腐烂病发生现状调查研究

调查了四川盐源、茂县和西藏林芝、昌都4个苹果产区腐烂病的发生情况,分析了苹果腐烂病发生程度与树龄、品种、立地条件、季节及气候因子的关系。结果表明,随树龄增加,腐烂病发生严重;金冠品种对腐烂病的抵抗力最差,红将军对腐烂病的抗性较强;土壤越黏重,植株根系生长发育不良,容易发生腐烂病;阳坡较阴坡更易发病;四川盐源与西藏林芝2个地区腐烂病发生程度较其他地方严重,且在苹果年生长周期中,腐烂病存在2个发生高峰。

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.