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Description: This study was conducted in San Luis ObisF County, California, at a site approximately 15 miles south of the city of San Luis Obispo. The site consisted of about 20 acres of rolling hills in a canyon and was representative of California live oak woodland. The flight line portion of the study was conducted in open grassland and the canopy work was done in a stand of live oaks approximately l/2 mile away. Weather data including temperature, wind speed and direction , and relative humidity was gathered from two locations. At the first location, a Met 'One weather station was set up on a hill approximately 50 m above the flight line and due north. A Weather Measure system was used at the second location approximately 1 kilometer northwest of the flight line. Spray applications were made between 0600 and 1200 hours on March 5, 1982.
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Subject: Carbaryl , Aerial spraying and dusting in agriculture--California
Group: Environmental Protection Agency
Creator: Weaver, D.J., Johnson, W.C., Oshima. R.J., California. Environmental Hazards Assessment Program
Language: English
Coverage: California
Format: Government Documents
Description: A helicopter spray trial with Sevin XLR (carbaryl) was conducted on a 14 acre area with dense oak, and other scattered trees. Sevin was applied from two altitudes, 180 and 50 feet above the tree tops. Samples were taken to determine mass deposition, particle sizes, and air concentrations of carbaryl; in the foliage canopy, on open ground, and downwind of the spray area. This trial established that significant mass deposition of carbaryl can be obtained at higher elevations, but only by sacrificing effective coverage and droplet size.
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Subject: Carbaryl , Insecticides -- Environmental aspects -- California, Aerial spraying and dusting in agriculture -- Environmental aspects -- California -- Tulare County
Group: Environmental Protection Agency
Creator: Segawa, R.T., California. Environmental Hazards Assessment Program
Language: English
Coverage: Tulare County (Calif.)
Format: Government Documents
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