Accession Number : AD0756371

Title :   A Field Experiment on the Impaction of Zectran Particles on Spruce Budworm Larvae.

Descriptive Note : Technical rept.,

Corporate Author : DESERET TEST CENTER FORT DOUGLAS UT

Personal Author(s) : Barry, John W. ; Tysowsky, Michael, Jr. ; Orr, Geoffrey F. ; Ekblad, Robert B. ; Marsalis, Richard L.

Report Date : FEB 1973

Pagination or Media Count : 92

Abstract : The U.S. Forest Service, supported by Deseret Test Center, conducted a field test during June 1972 in the Lolo National Forest, Montana. The objective was to investigate the impaction of dry-liquid Zectran particles on the western spruce budworm larvae as a function of particle size. A helicopter was used as the dissemination vehicle because of the downwash effect which assists aerosol penetration of the forest canopy and enhances particle impaction. Rotorod samplers and glass impaction slides were used to obtain aerosol and particle size data. Budworms and fir needles were examined, and impacting particles were counted and measured. (Author Modified Abstract)

Descriptors :   *INSECTICIDES, *TREES, *INSECT CONTROL, LARVAE, PARTICLE SIZE, SAMPLING, SPRAYS, HELICOPTERS, MONTANA.

Subject Categories : Hygiene and Sanitation
      Biochemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE