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Incidence and severity of annosus root rot in Loblolly pine plantations in Virginia
Author(s) -
Bradford B.,
Skelly J. M.,
Alexander S. A.
Publication year - 1978
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1978.tb01460.x
Subject(s) - biology , loblolly pine , basidiocarp , botany , heterobasidion annosum , woody plant , incidence (geometry) , root rot , horticulture , forestry , pinus <genus> , taxonomy (biology) , mathematics , geography , geometry , picea abies
Fourteen plots of 25 loblolly pines each were excavated by bulldozers in order to determine incidence and severity of Heterobasidion annosus in asymptomatic loblolly pine in Virginia. Of the 350 trees sampled, 85% were infected with H. annosus. Basidiocarps were found on 9% of the sampled trees. The average frequency of roots infected per tree with H. annosus , for all measured trees (trees with > 1% infection evident), was 30% of the primary roots and 31% of the secondary roots. The average root length infected for all the measured trees was 14% for primary roots and 15% for secondary roots.