Original Articles

Shoot and Needle Diseases of Pinus spp. in South Africa

Published in: South African Forestry Journal
Volume 154, issue 1, 1990 , pages: 60–66
DOI: 10.1080/00382167.1990.9629054
Author(s): P.W. Crous,, M.J. WingfieldDepartments of Microbiology and Plant Pathology,, W.J. SwartDepartments of Microbiology and Plant Pathology,

Abstract

Fungi associated with needle and shoot diseases of Pinus spp. in South Africa were surveyed. Sphaeropsis sapinea caused shoot die-back of trees and seedlings of numerous pine species while Colletotrichum acutatum caused similar symptoms on seedlings of P. radiata. Dothistroma septospora was associated with needle blight of P. radiata only in the Eastern Cape Forest Region, while Cercoseptoria pini-densiflorae was associated with needle infections of a number of Pinus spp. in various parts of the country. Cyclaneusma minus, which has the potential to cause needle disease, occurred on senescent needles and needle litter of Pinus spp. throughout the country but was not associated with disease symptoms. Although the genus Lophodermium includes important pathogens of Pinus spp. only the saprophyte L. australe was found in the course of this study. A key is included to distinguish between the various fungi and possible control measures are considered.

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