Laubholzbockkäfer: Waldbefall

ALB Befall im Wald ist noch nicht im grösseren Stil gesichert. ALB-Freilandbefall ist mehrheitlichi in Urbanen Gegenden gefunden worden.

Aus diesem Grunde widmen wir hier zu diesem Thema ein eigenes Kapitel.

News release January 10, 2014: Deadly Asian longhorned beetle more likely to succeed in red maple

http://www.na.fs.fed.us/nanews/nastories/20140109_ALB_Study.pdf

Hier eine interessante Arbeit von Kevin J. Dodds über den ALB Befall im Wald. Diese Arbeit gibt es als freeload unter:

http://www.nrcresearchpress.com/doi/pdf/10.1139/x11-097

An invasive urban forest pest invades natural environments — Asian longhorned beetle in northeastern US hardwood forests

Kevin J. Dodds,a David A. Orwigb

aUSDA Forest Service, Northeastern Area State and Private Forestry, 271 Mast Road, Durham, NH 03824, USA.

bHarvard University, Harvard Forest, Petersham, MA 01366, USA.

Corresponding author: Kevin J. Dodds (e-mail: kdodds@fs.fed.us).

Abstract

An infestation of Asian longhorned beetle (ALB) (Anoplophora glabripennis (Motschulsky)) was detected in Worcester, Massachusetts, in 2008. The discovery of this pest, previously only seen in urban environments of North America, led to the unprecedented establishment of a 243 km2 quarantine zone that included urban parks, neighborhoods, and natural forests. Because ALB behavior in forested stands is virtually unknown, two closed-canopied forested stands (Bovenzi and Delaval) infested with ALB within this zone were sampled during 2008–2010 to document stand conditions, assess ALB host selection, and determine ALB impact on tree growth. Thirty-two percent of the Acer sampled in Bovenzi were infested with ALB compared with 63% in Delaval. In Delaval where three maple host species were available, ALB was found more often in Acer rubrum L. than in Acer saccharum Marsh. or Acer platanoides L. Radial growth patterns did not differ between ALB-infested and uninfested Acer trees in Bovenzi. In contrast, ALB-infested trees in Delaval were significantly older and larger than uninfested trees and exhibited slower radial growth and ring width index patterns compared with uninfested trees. Results suggest that if left uncontrolled, ALB can readily disperse into natural forest landscapes and alter the makeup of North America’s hardwood forest region.

Bilder vom Befall aus Massachusetts, Worcester, Bovenzi and Boylston, USA

Alle Fotos mit freundlicher Genehmigung von Kevin J.Dodds, USDA Forest Service, Durham, USA