Translator Disclaimer
1 June 2012 Evaluation of Screen Barriers on Redbay Trees to Protect them from Xyleborus glabratus (Coleoptera: Curculionidae: Scolytinae) and Distribution of Initial Attacks in Relation to Stem Moisture Content, Diameter, and Height
Author Affiliations +
Abstract

Fine mesh screen was used to create a physical barrier to prevent redbay ambrosia beetles, Xyleborus glabratus Eichhoff (Coleoptera: Curculionidae: Scolytinae), from accessing various parts of the boles of redbay trees, Persea borbonia (L.) Sprengel, and infecting them with the laurel wilt fungus, Raffaelea lauricola (T.C. Harrington, Fraedrich, & Aghayeva). Screen barriers prevented beetles from attacking boles of mature redbay trees from the ground to 1 or to 3 m and from 1 to 3 m above ground. Untreated control trees were sampled more extensively to determine how location of initial attacks varied with height, diameter, and moisture content of the wood. Screening did not affect tree survival, and all of the trees died within 243 d from the beginning of observation. Initial points of attack by X. glabratus varied from ground level to heights of at least 6.6 m. Trees showed characteristic laurel wilt symptoms with as few as two X. glabratus entry points. The number of attacks exhibited nonlinear relationships with diameter (P = 0.0004; r2 = 0.82) and height (P = 0.0013; r2 = 0.69) but were not correlated with moisture content. Attacks increased gradually with increasing stem diameter up to ≈10 cm after which the attacks became more numerous. X. glabratus attacks were most numerous on the tree bole near the ground. Attacks then declined as tree height reached 2–3 m. From 3 to 8 m, attacks were relatively consistent.

© 2013 Entomological Society of America
M. Lake Maner, James L. Hanula, and S. Kristine Braman "Evaluation of Screen Barriers on Redbay Trees to Protect them from Xyleborus glabratus (Coleoptera: Curculionidae: Scolytinae) and Distribution of Initial Attacks in Relation to Stem Moisture Content, Diameter, and Height," Journal of Economic Entomology 106(4), 1693-1698, (1 June 2012). https://doi.org/10.1603/EC13125
Received: 13 March 2013; Accepted: 1 May 2013; Published: 1 June 2012
JOURNAL ARTICLE
6 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top