Open AccessControl of Red Elm Bark Weevil (Magdalis armicollis) in American Elm (Ulmus americana) by Trunk Injection of Azadirachtin
Author(s) -
Michael R. Booth,
Mark S. Goettel
Publication year - 2012
Publication title -
arboriculture and urban forestry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.222
H-Index - 47
eISSN - 2155-0778
pISSN - 1935-5297
DOI - 10.48044/jauf.2012.034
Subject(s) - weevil , bark (sound) , trunk , biology , horticulture , botany , hypera postica , azadirachtin , toxicology , agronomy , pesticide , ecology
Trunk injection of azadirachtin into elm trees (Ulmus americana) using the Ecoject™ Microinjection System to reduce emergence numbers of red elm bark weevil (Magdalis armicollis) was evaluated. Twelve mature trees were each injected with TreeAzin™ in early August 2010 at a rate of 16 ml per 15.2 cm trunk circumference at breast height. The following year, weevil activity was monitored at weekly intervals for four weeks using sticky traps placed in the canopies. There was a significant reduction of 55%–60% in weevil activity in early summer in the treated tree canopies as compared to the control, suggesting that this method may be an effective management tool for this pest.