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Use of historical temperature data for timing insecticide applications of the Nantucket pine tip moth (Lepidoptera: Tortricidae): evaluation of damage and volume increment efficacy
Author(s) -
Fettig Christopher J.,
Berisford C. Wayne
Publication year - 2002
Publication title -
agricultural and forest entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.755
H-Index - 55
eISSN - 1461-9563
pISSN - 1461-9555
DOI - 10.1046/j.1461-9563.2002.00135.x
Subject(s) - tortricidae , lepidoptera genitalia , biology , toxicology , population , zoology , population density , forestry , horticulture , botany , demography , sociology , geography
1 The effectiveness of optimal spray period intervals based on mean daily temperatures were evaluated as a spray‐timing tool to control high density populations of the Nantucket pine tip moth Rhyacionia frustrana (Comstock). 2 Initial tree growth realized from first generation R . frustrana control was compared to that from conventional applications of one insecticide treatment scheduled for each of three annual generations. 3 The optimal spray period intervals provided by Fettig et al . (2000a) were highly effective for controlling R . frustrana infestations. The control group averaged 47.0 ± 2.2% whole tree damage for all sites and generations as compared to 0.6 ± 0.2% for the treated group. 4 Volume gains attributable to R . frustrana control averaged 16.9%, 46.4% and 98.6% for first generation control, and 46.6%, 72.7% and 146.3% for conventional applications of one insecticide treatment scheduled for each of three annual R . frustrana generations at Northampton, Halifax I and Halifax II, respectively. Growth returns increased as mean damage estimates increased for both treatments, suggesting that returns realized from a single, first generation application are likely to increase with population density.