苹果枝干干腐病在蓬莱地区发生情况调查

Investigation on the occurrence of Botryosphaeria canker of apple in different ages and root stock-scion combination in Penglai area

调查了蓬莱地区69个苹果园的苹果枝干干腐病发生情况。结果表明,苹果枝干干腐病发生情况与灌水密切相关,并且不同树龄、不同砧穗组合树的发病情况不同。发病率和病情指数以灌溉充足园低于灌溉不足园;灌溉充足园以树龄17年以上树的最高,树龄1~17年生树之间无显著差异;灌溉不足园也以树龄17年以上树最高,发病部位集中于1~3年生枝;矮化密植园高于乔化稀植园,以矮化中间砧密植园最高,发病部位主要为基部砧段。

The occurrence of Botryosphaeria canker of apple with different ages and root stock-scion combination in 69 apple orchards was investigated in Penglai area.The results showed that the occurrence of the disease was closely related to irrigation,and the incidence was different in different tree ages and different root stock-scion combination.The incidence rate and disease index of sufficient irrigation orchards were lower than insufficient irrigation orchards.Under sufficient irrigation conditions,the highest incidence rate and disease index were found in trees over 17 years old,but there was no significant difference between the trees with the age of 1 to 17 years.Under insufficient irrigation conditions,the incidence rate and disease index were the highest in trees over 17 years old,and concentrated on 1~3 year old branches.The incidence rate and disease index of dwarfing and close planting orchard were higher than those of arborized fruit orchard.The incidence rate and disease index of dwarf intermediate rootstock orchards were the highest,mainly in the base rootstock section.