Herbicides for control of western swordfern and western bracken
R. E. Stewart, Pacific Northwest Forest and Range Experiment Station (Portland, Or.), United States. Forest Service
Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1976 - Nature - 11 pages
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15 months active ingredient applied in water August l4 Average frond height bracken control bracken fern concentrations of dicamba control of bracken control of western Corvallis Cover Stems stem damage Douglas-firs dicamba and bromacil Dichlobenil Dosage Cover Stems Douglas-fir and ponderosa drip point early foliar sprays Effectiveness of asulam equivalent to 200 Forestry Commission four herbicides fronds per live gallons per acre illus individual plants ingredient per acre ingredient per l00 July l3 June l9 lb ai/A live plant Average midsummer sprays months after treatment No./ft2 Feet Untreated Northwest Oreg Percent No./ft2 Feet pesticide picloram plant Average frond plots ponderosa pine Portland Pounds of active Pteridium aquilinum Range Exp shown in table sprays containing sprays on western Stems stem height studies were installed surfactant swordfern plants treatment was applied USDA volume equivalent water carrier Weed Control Conf Weed Sci Wenatchee Mountains western bracken western Oregon western swordfern