Open AccessBalsam Woolly Adelgid Control, 1986
Author(s) -
B. M. Kard,
Fred P. Hain
Publication year - 1988
Publication title -
insecticide and acaricide tests
Language(s) - English
Resource type - Journals
ISSN - 0276-3656
DOI - 10.1093/iat/13.1.375a
Subject(s) - balsam , bark (sound) , sprayer , horticulture , christmas tree , chemical control , biology , population , forestry , toxicology , dead tree , botany , agronomy , ecology , geography , medicine , environmental health
A study was conducted in July and August to compare the efficacy of 2 insecticide treatments for Balsam woolly adelgid (BWA) control. A Fraser fir Christmas tree plantation near Cullowhee in Jackson County, N.C., was selected as the study site. Using a 2.5-gal hand-pressurized portable sprayer, each insecticide treatment was replicated 6 times (1 tree/replicate) by spraying the entire main stem of 6- to 7- ft-tall fir trees until runoff. Four control trees received water sprays only. Pretreatment counts were taken on 3 Jul by removing 2 circular disks of bark from the bole of each tree using a no. 8 cork borer. Disks were taken from the most heavily infested bark areas. In the same manner, posttreatment counts were taken at 2 and 6 wk after treatment. All BWA life stages (both living and dead) were counted/disk, and mean live posttreatment population densities and % live BWA density changes were determined.
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