Southeast Exotic Pest Plant Council

AFFECTS OF HERBICIDE TIMING AND APPLICATION METHOD ON FRUIT MATURATION AND SEED VIABILITY IN CHINESE PRIVET (LIGUSTRUM SINENSE). Sarah R. Vokoun and Larry R. Nelson, Department of Forestry and Natural Resources, Clemson University, Clemson, SC 29634. (


Herbicide applications applied as directed foliar (glyphosate) and basal stem (triclopyr) sprays were tested at three rates and eight application times (May to December) on mature privet plants. Foliar spray rates of either 5 or 10 % v/v in water were effective from May through December. A 2.5 %-rate was ineffective (<50% control) from May to September, but provided 100% control when applied in October and November. Basal sprays were effective at 20 and 30 % from May through October. Privet control with either herbicide dramatically reduced seed populations and viability when treated from May to September. An accurate assessment of seed viability from October, November, and December treatments was not conducted due to loss of seed sample. Early herbicide applications of either glyphosate or triclopyr are most likely to control both mature plants and the majority of seed production.

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