Directed Foliar Sprays of Forestry Herbicides for Loblolly Pine Release1

t Thii research was sponsored by a grant from the Georg ia Fores try Commiss ion . The assistance and cooneration of Mead Coated Board, Columbus, GA, and the Armuchee Ranger District, USDA Forest Service, LaFayette, GA, are gratefully recognized. Use of trade names is for reader’s information and does not constitute official endorsement or approval by the U.S. Department of Agriculture to the exclusion of any other suitable product or process. Pesticides used improperly can be injurious to humans, animals, and plants. Follow the directions and heed all precautions on the label. Store pesticides in original containers under lock and key out of the reach of children and animals and away from food and feed. Remember to read the entire product label and use only according to label instructions. pared as directed foliar sprays applied in May, July, and September on seven hardwood species and on loblolly pine. Equalcost mixtures that met or exceeded minimum labebd rates were tested for Weedone 2,4DP, Garlon 4, Garlon 3A, Arsenal Applicator Concentrate, Roundup, Escort, and Roundup + Escort. Test hardwoods were sweetgum, southern red oah, water oak, red maple, pignut hickory, dogwood, and yellow poplar. Crown uolume reduction and rootstock reduction after one growing season were the main indicators of effuacy. Using directed sprays, yellow pojdar was the easiest species to control, and pignut hickory was the most difficult. Control of sweetgum was most effective with Weedone, Arsenal, and Roundup. For control of oaks? the most effective applications were in July with Arsenal, Garlon 4 and 3A, and Roundup; but these and other hardwood species tended to refoliate 2 years afte Arsenal treatment. Herbicide safety to loblolly pine was best with Arsenal and Escort, while injury was greatest with Roundup and Garlon 3A, which might have potential use in precommercial thinnings. South. J. A#. For 14(4):199-206.