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松针褐斑病在湿地松幼林中的发展(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
1987年01期
Page:
1-7
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
DEVELOPMENT OF BROWN-SPOT NEEDLE BLIGHT IN SLASH PINE PLANTATIONS
Article ID:
1000-2006(1987)01-0001-07
Author(s):
Li Chuandao Han Zhengmin & Ye Jianren(Nanjing Forestry University) Zheng Weipen & Zhang Zhenghe(Fujian Forestry Institute)Zheng Ruhuang & Zhang Huating
Guangzhuang Forestry Station, Fujian
Keywords:
Lecanosticta acicola Pinus elliottii
Classification number :
-
DOI:
10.3969/j.jssn.1000-2006.1987.01.001
Document Code:
A
Abstract:
This paper reports on the results of investigations of brown-spot needle bligt (Lecanosticta acicola) in slash pine (Pinus elliottii) plantations in the northern region of Fujian province, China. The conidia of brown-spot fungus were released and spread by the splashing of the rain. From a 1.7m high affected tree, most splashed conidia landed within the range of 0-3.4 meters, never exceeding 8.5 meters, when the wind velocity is less than 1m/s. In a slash pine plantation, from November 1982 to April 1985, the average distance of the spreading of disease from an infectious center was 8 meters, the ratio of the infected trees increased by [50% and the disease index increased by 23. The disease developed all the time from March to November, the heaviest infection occured between late April and late June, with the period of September and October coming next. The optimum temperature for disease development was 20-25°C in average for a period of ten days.

References

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Last Update: 1900-01-01