You are here: Home
/ Publication Information
Title: Premature Needle Loss of Spruce
Author: Juzwik, Jennifer; O Brien, Joseph G.
Source: NA-PR-01. [Radnor, PA]: U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
Publication Series: Full Proceedings
Description: Premature needle loss on white, black and Norway spruce has been observed in forest plantations in Wisconsin and Minnesota during the past six years. Symptoms vary by species but usually appear first in 2-4-year old needles on lower branches. Infected needles are dropped, resulting in branch mortality that progresses upward through the crown, sometimes killing even large, dominant trees. Several insects and fungi, as well as abiotic stresses such as drought and poor soils, appear to contribute to the damage. The fungus Rhizosphaera kalkhoffii is the only organism that has, been consistently associated with needle loss. R. kalkhoffii is commonly found on ornamental blue spruce throughout Minnesota and Wisconsin.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
XML: View XML
Juzwik, Jennifer; O Brien, Joseph G. 1990. Premature Needle Loss of Spruce. NA-PR-01. [Radnor, PA]: U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility