. Current topics in forest entomology : selected papers from the XVth International Congress of Entomology, Washington, , 1976. Forest insects Congresses. Figure 2.—Map of the lower end of the 1974 experimental night spray layout showing the location of the low level spray pass (mile 4) and high level spray pass (mile 13). June 12, 1974, a DC-6B aircraft was released to provide a single spray run across the layout. Results of a single-line emission run at 1500 feet above and across the layout plus an aborted run are presented in figure 3. Spray deposits were recorded from both passes acros
. Current topics in forest entomology : selected papers from the XVth International Congress of Entomology, Washington, , 1976. Forest insects Congresses. Figure 2.—Map of the lower end of the 1974 experimental night spray layout showing the location of the low level spray pass (mile 4) and high level spray pass (mile 13). June 12, 1974, a DC-6B aircraft was released to provide a single spray run across the layout. Results of a single-line emission run at 1500 feet above and across the layout plus an aborted run are presented in figure 3. Spray deposits were recorded from both passes across a 6 mile area of the layout with a maximum deposit of 6 drops/cm occurring at a position miles from the point of emis- sion (fig- 3). Drop sizes as small as 20 microns (m ) were collected on the kromekote cards and glass plates, thus confirming the relative low-volatility of the #2/#4 oil formulation. Projected cumulative deposits from a series of successive spray swaths at 3000-foot intervals indicated that a potential toxic deposit of 20 spray droplets/cm could be deposited on the target site of spruce and fir foliage to kill early instar budworm larvae or adult moths (Kettela 1975). Plans were, therefore, established to undertake a night spray application of a pesticide against early instar larvae of the spruce budworm in 1975. In the spring of 1975, an experimental site of 35,000 acres was selected at Maniwaki, Quebec, a distance of 60 miles from the air field. Two sampling lines were established across the area to provide spray deposit and biological data on transects at 1/20 mile intervals. A cross section of the experi-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original International Congress of Entomology (15th : 1976 : Washington, D. C. ). Washington : United States Dept. of Agriculture, Fores
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