杨树拟茎点菌溃疡病的研究  

Poplar canker caused by Phomopsis sp

作　　者：钟兆康 赵敏[1] 袁志文[1] 李连芝[1] 陈玉文 刘树怀 邢景光 程文儒 张文学 窦国玉 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110015 [2]辽宁锦州市森林病虫害防治站,锦州121000 [3]辽宁北镇县森林病虫害防治站,北镇121300

出　　处：《应用生态学报》1993年第1期22-26,共5页Chinese Journal of Applied Ecology

摘　　要：本病系我国杨树新发生的一种病害。病原菌的分生孢子有2种形状,无色透明、单胞,呈纺缍形孢子大小为1.64—2.74×9.59—13.7μm。线形孢子顶端弯钩状大小为1.37—1.78×15—27.4μm。病原菌适宜生长的培养基为PDA、麦芽粉、豆饼粉培养基;温度为25—32℃和pH6—10。本病于4月下旬发病,5月中下旬分生孢子成熟,6月中下旬为分生孢子飞散高峰期。经室内采用多菌灵、甲基托布津、福美砷的200倍液浸泡插穗30、60、90分钟处理均有药害,采用100—200倍液浸泡10分钟无药害,对病害有防效。造林地幼树可采用上述药剂的100倍液进行刮破病斑涂抹,防效可达87.5％。The poplar canker caused by Phomopsis sp. is a new disease occurring on poplars in China. Two shapes of conidia are found. One is fusiform, hyaline, single-cell, 1.64—2.74×9.59—13.70μm, and another is linear with curved top, 1.37—1.78×15.00—27.40μm. The suitable growth temperature of fungus is 25-32℃, its suitable pH is 6—10, and potato dextrose agar, malt agar media and bean cake are suitable for its growth. The disease occurs in the last ten days of April, conidia matures in the second and last ten days of May, and the dispersing peak of conidia is in the second and last ten days of June. Experiments with poplar cuttings treated by carhendazim, thiopanate methyl and asomate (200-fold concentration) are carried out in laboratory. The results show that the harm of fungicides is produced on cuttings in 30,60 and 90 minutes, but, a concentration of 100—200-fold is harmless in 10 minutes and shows a good effectiveness for controlling the disease. An effect of 87.5％ is obtained on young trees in afforested plantation when the above mentioned fungicides (100-fold) concentration are used.

关 键 词：杨树 溃疡病 拟茎点菌 

分 类 号：S763.721.1[农业科学—森林保护学]