果树穿孔病已成为西藏林芝地区现存光核桃上一种重要叶部病害，严重影响光核桃树长势及寿命。为明确该病害发生情况及发病因素，2017—2018年对林芝地区不同区域光核桃穿孔病发病情况进行详细调查。结果表明，该病害在调查区普遍发生，平均病叶率为26.85%，平均病情指数为9.28，且不同区域发病程度不同。该病害主要在6月下旬开始发病，8月下旬达到发病高峰期，最高病叶率可达89.45%。同时，海拔、空气相对湿度、树龄、生境与光核桃穿孔病的发生密切相关，海拔低、空气相对湿度大、周围生态环境越密闭的区域，发病越重；树龄越大，发病越严重。调查结果对于林芝地区光核桃穿孔病的防治具有参考意义。
Abstract
Perforation disease has become one of the important leaf diseases of Amygdalus mira that severely affects its growth and life span in Linzhi, Tibet. In 2017 and 2018, the A. mira perforation disease incidences were investigated in different regions of Linzhi, to clarify the occurrence and pathogenic factors of the disease. The results showed that A. mira perforation disease was commonly occurred in all investigated areas, and different regions had different degrees of disease incidence. The average leaf rate and disease index were 26.85% and 9.28, respectively. As also, the disease was initially and severely occurred at the end of June and August, respectively, and the highest leaf rate was 89.45% at the end of August. In addition, the altitude, relative humidity, tree age and living habitat were considered as the main factors that related to the disease
occurrence. Under the condition of lower altitude, higher relative humidity, more closed ecological environments and older trees, the disease could be more serious. The study can provide references for controlling A. mira perforation disease in Linzhi, Tibet.
关键词
林芝；光核桃；穿孔病；发生；调查
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Key words
Linzhi; Amygdalusmira; Perforation disease; Disease occurrence; Investigation
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