摘要
杨树新造林地溃疡病的发生时间为冬末初春,一般在2月底或3月初,4-5月为发病高峰期,秋季较少有病斑出现。杨树新造林地溃疡病的发生与气候条件、育苗技术、造林技术等密切相关。在春旱、夏旱、暖冬等气候异常年份、育苗密度过大、施氮肥过多过晚、造林技术不规范等情况下,杨树新造林地溃疡病发生严重,造林成活率低。
The canker disease of poplar occurs usually in late winter and early spring, generally reaches peak at the end of February to the beginning of March and reaches and during April and May, respectively. The lesions rarely appear in the autumn. The canker disease of poplar is closely related to the weather conditions, the techniques of raising seedling and afforestation. Abnormal weather conditions such as spring drought, summer drought, and warm winter, over-density of the seedling, excessive dosage of the nitrogen fertilizer and the non-standard techniques of afforest etc. , might lead to the more serious canker diseases and the lower surviving rate in the new forestation site.
出处
《江苏林业科技》
2008年第2期16-19,共4页
Journal of Jiangsu Forestry Science & Technology
关键词
杨树
新造林
溃疡病
发病规律
Poplar
New forestation
Canker disease
Disease epidemics
