The Development of Die-back of Pines by Sphaeropsis sapinea / 松梢枯病的发生规律

The die-back of pines caused by Sphaerpsis sapinea (Fr.) Dyko & Button widely occurred in Jiangsu Province in recent years. Pycnidia of the causal fungus developed on infected needles, sheathes and scaly-leaves. Conidia are dispersed by rain. The pathogen of die-back of pine can't dissminat...

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Published inForest research (Beijing) Vol. 6; no. 2; p. 157
Main Authors 沈伯葵, 褚祥如, 张明海, 薛梦澜, 姚长林
Format Journal Article
LanguageChinese
Published Beijing Chinese Academy of Forestry 01.01.1993
Subjects
Pathogens
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Summary:The die-back of pines caused by Sphaerpsis sapinea (Fr.) Dyko & Button widely occurred in Jiangsu Province in recent years. Pycnidia of the causal fungus developed on infected needles, sheathes and scaly-leaves. Conidia are dispersed by rain. The pathogen of die-back of pine can't dissminated by seeds. The infectious stages of pine shoots coincided with the conidia-releasing stages respectively. The tender shoots are highly susceptible when their lengths reach to about one-third of the total length. The pathogen invade the shoot by direct penetration through the epidermis. Mature pine stands may become more susceptible, but young stands surrounded by severely diseased mature pine stands is also infected severely. Pine stands on poor sites are seriously infected. Pinus massoniana is the most resistant species of the genus. The other species in order of susceptibility are Pinus riglda, P. bariksiana, P. taeda, P. elliottii, P. thunbergii, and P. yunnanensis. 由松球壳孢菌引起的松梢枯病在江苏普遍且严重地发生。该病菌只在病死针叶、叶鞘和鳞叶上产生分生孢子器。越冬病组
ISSN:1001-1498