Publications - Faculty - Recently Submitted Faculty Publications 2010
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Futch - Proc. Florida State Horticultural Society
CITRUS STUMPS SPROUT CONTROL
Stephen H. Futch and Shawron Weingarten
Abstract. To assess the effectiveness of Remedy Ultra (triclopyr), two studies have been conducted during 2008-10 to control citrus stump sprouting after tree removal. The first study examined various application rates of Remedy (25, 50 and 75% mixed with diesel) whereas, the second study looked at the impact of delaying application of Remedy on the control of sprout formation. During the first study, 12 of the 15 (80%) untreated stumps sprouted. Sprouts were noted over the study period with 0, 5, 3, 1 and 3 of the 15 stumps sprouting at approximately 30, 60, 90, 120 and 150 d after tree removal, respectively. All treated stumps, regardless of the treatment rate, remained sprout free during the study period. For the second study, treatments of Remedy were applied at 25 or 50% solution mixed with diesel fuel at time of clipping, 24, 48 and 72 h later and compared to untreated controls. At Lake Placid, 7 (100%) untreated stumps sprouting by 150 d after tree removal. At this site, 4 stumps within the 56 treated group had root sprouts but not on the treated stump. Remedy Ultra was slightly less effective in controlling sprouts when applied at the 25% Remedy/75% diesel than at the 50% rate. Delaying application and using the lower herbicide concentration rate also had a slight negative impact on sprout control. At Arcadia, 86% of the untreated stumps sprouted within 90 d of clipping with only one treated stump sprouting.
