Noncrop pine control is a major issue confronting managers of openings along roadsides and in clearcuts.Herbicides containing glyphosate are commonly used for pine control. Traditionally, managers have applied 4 quarts product/acre with inconsistent results. LI 700 is a penetrating non-ionic surfactant that contains lecithin. Selected treatments of Makaze, Accord Concentrate and Accord XRT II, some with and without LI 700 or Milestone VM Plus, were tested for control of loblolly (Pinus taeda L) and shortleaf (P. echinata Mill) pines in southeastern OK. Herbicides were applied at 15 GPA on 10-Jun-08. Plots were evaluated for control on 14- Jun-09. Three glyphosate formulations at 4 quarts product/acre produced dramatically different results exemplifying the state of operations today. All 6-quart and 8-quart formulations provided >89 percent control. Treatments with LI 700 exhibited more control than comparable treatments without LI 700. Adding 4 quarts product/acre of Milestone VM Plus to 4 quarts product/acre of Accord XRT II increased control numerically over Accord XRT II alone. Managers seeking to control unwanted pines while using less product, should consider Makaze (6 quarts product/acre). This treatment required less active ingredient to provide statistically similar pine control as higher rates of glyphosate.
Yeiser, Jimmie L.; Finke, M.; and Grogan, Jason, "Controlling roadside noncrop pine in SE Oklahoma using selected glyphosate formulations with and without LI 700 and Milestone VM Plus" (2012). Faculty Publications. 207.