. Chemical control of brush in ponderosa pine forests of central Oregon. Brush Control Oregon; Ponderosa pine Oregon. TERMINAL BUDS DEAD 100 Percent. .75 .75 RATE ( Pounds per acre ) LEGEND: Water carrier Emulsion carrier Figure 7. — Average percentage of ponderosa pine -terminal buds killed by 2, 4 - D and 2, 4, 5 - T applied during the growing sea- son (combined results for May 5, May 26, and July 1, 1955 — basis, 72 plots). The emulsion carrier contained 1 gallon of summer oil per acre. TERMINAL BUDS DEAD 100 Percent t—— 80 60 40 LI 20 5TH 26 TH MAY I Water carrier Emuls
. Chemical control of brush in ponderosa pine forests of central Oregon. Brush Control Oregon; Ponderosa pine Oregon. TERMINAL BUDS DEAD 100 Percent. .75 .75 RATE ( Pounds per acre ) LEGEND: Water carrier Emulsion carrier Figure 7. — Average percentage of ponderosa pine -terminal buds killed by 2, 4 - D and 2, 4, 5 - T applied during the growing sea- son (combined results for May 5, May 26, and July 1, 1955 — basis, 72 plots). The emulsion carrier contained 1 gallon of summer oil per acre. TERMINAL BUDS DEAD 100 Percent t—— 80 60 40 LI 20 5TH 26 TH MAY I Water carrier Emulsion carrier JUNE JULY AUGUST 29 TH SEPTEMBER Figure 8. —- Combined average percentage of ponderosa pine terminal buds killed by 2, 4-7) and 2, 4, 5 - T applied at the rate of 1 pound per acre at four different dates (basis: 32 plots). The emulsion carrier contained 1 gallon of summer oil per acre. September 29 treatments with the water carrier killed no terminal buds. -14-. 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 Dahms, Walter G; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). [Portland, Or. : Pacific Northwest Forest and Range Experiment Station, Forest Service, U. S. Dept. of Agriculture]
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