Aerial Spray Evaluation Pine Butterfly Test, Bitterroot National Forest, Montana, 1973,
Abstract
The US Department of Agriculture, Forest Service, conducted a pilot test in the Bitterroot National Forest, Montana, during June 1973, supported by the US Army Dugway Proving Ground, Dugway, Utah. The pilot test consisted of helicopter spraying twelve 40-acre plots. Each plot had a high population level of pine butterfly (Neophasia menapia), a defoliator of the ponderosa pine. Six plots were sprayed with the insecticide Zectran and six with the microorganism, Bacillus thuringiensis. US Army support included meteorological forecasting, meteorological monitoring at each plot, spray deposition sampling, deposition sampler assessment, pretest prediction modeling of spray behavior, and tracking during helicopter swathing. The report presents results and recommendations on recoveries of spray droplets, spray penetration plots of the forest canopy and discussions on droplet behavior.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1975
- Accession Number
- ADA006256
Entities
People
- Bruce S. Grim
- Gary L. Sutton
- John W. Barry
- Robert B. Ekblad
- William M. Ciesla