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当前位置: 首页 > 文章 > 铅笔柏梢枯病研究初报 南京林业大学学报(自然科学版) 1986 (2) 37-46
Position: Home > Articles > A NURSERY BLIGHT OF SABINA VIRGINIANA Journal of Nanjing Forestry University(Natural Sciences Edition) 1986 (2) 37-46

铅笔柏梢枯病研究初报

作  者：
戴雨生
单  位：
江苏省林业科学研究所
关键词：
铅笔柏;柏梢枯病;桧柏拟茎点菌
摘  要：
铅笔柏梢枯病是近年来在江苏省新发现的一种危险性苗期病害。主要为害1～3年生苗木,引起嫩梢枯萎直至幼苗死亡。 经分离培养和接种证实铅笔柏梢枯病是由桧柏拟茎点菌(Phomopsis juniperovora)引起。伤口是重要的侵染途径,一年生苗上无伤也能侵染。病菌孢子和菌丝体都具侵染能力,潜育期3～5天。 病菌苗丝体呈绢丝状平贴在培养基上,产生橙黄色色素。菌丝体生长最适温度23～25℃,孢子发芽最适温度20～23℃,孢子发芽最低湿度为90％,但以100％为最好,病菌对酸碱度适应范围为pH3.2～8.3。 室内人工接种成功的有Sabina等7属中的19种植物。野外以铅笔柏、塔柏受害重。 苗木生长期间如遇持续阴雨有助于病害的发生和蔓延,低洼地苗木易遭病菌侵染。
译  名：
A NURSERY BLIGHT OF SABINA VIRGINIANA
作  者：
Dai Yusheng (Forestry Research Institute, Jiangsu Province)
关键词：
Sabina virginiana; Cedar blight; Phomopsis juniperovora
摘  要：
Cedar blight was found in Jiangsu province, China in 1983. Seedlings of Sabina virginiana are severe damaged. Seedlings of Sabina chinensis cv. "pyrami-dalis" , Fokienia hodginsii, Cupressus funebris and C. giganied are also infected. Infections were observed by artificial inoculations with causal fungus on many other species and varieties of Sabina, Cupressus, Chamaecyparis, Thuja, Platycladus and Cryptom'eria. The causal fungus was identified as Phomopsis juniperovora Hahn on the bases of koch's postulates. Pycnidia occur on died shoots and leavts. When embedded they become crumpent, subglobose to lens-shaped, thickened at the upper part ostiolate, brown to black and 134~378m in diameter, while the con-idiophcres are filiform, hyaline and 10-15 l-2m. The a type conidia are oblong to ellipsoid, sometimes spindle shaped with obtuse ends, continuous with 2~3 oil drops, hyaline, 6.4~11.6 x 2.5~3.9m; and the type conidia filiform, often curved as s-shaped or hooked at the upper part, hyaline, 18~241 1m. The fungus invades through wounds or penetrates epidermis without wounds on current year seedlings. The optimum temperature for mycelium growth is 23~25, and about 22 for a type conidium germination. The pH for mycelium growth ranges between 3.2 and 8.3 and about the same for conidium germination.

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