Fomes Annosus Reduces Height and Diameter Growth of Planted Slash Pine
A stem analysis of 65 slash pine (Pinus elliottii var. elliottii Engelm.) trees indicated that trees with less than half of their roots attacked by Formes annosus (Fr.) Karst. at the end of a 6-year study period showed little or no loss in height growth and only slight loss in cross-sectional area growth. However, in trees with more than half of their roots infected the following occurred: (1) losses in cross-sectional area growth were detected as early as the third year after thinning and were observed throughout the merchantable stem of the trees; (2) during the fourth through sixth year after infection of cut stumps, losses in cross-sectional area growth at 1.6 m above ground averaged 20 percent in trees with vigorous crowns and 32 percent in trees with weak crowns; (3) some individual trees with weak crowns and massive infection of roots apparently maintained normal growth rate; (4) abundant spring rain seemed to increase growth; and (5) height growth for the 6 years following thinning was reduced about 40 percent. FOREST SCI. 23:299-306.
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Document Type: Journal Article
Affiliations: Project Leader, Research Work Unit 1302, Southern Forest Experiment Station, Forest Service--USDA, New Orleans, LA 70113
Publication date: 01 September 1977