Antitranspirants Partially Mitigate Auxin Herbicide Injury on Tomato Plants

The use of dicamba and 2,4-D products on herbicide-tolerant crops has resulted in numerous cases off-target movement injury to sensitive plants, including tomato ( Solanum lycopersicon L.). Two greenhouse studies were conducted determine whether ‘Big Beef’ (‘BB’) or ‘Florida 91’ (‘FL’) plants pretreated with an antitranspirant, Moisture-Loc (ML) at 100 mL·L −1 , TransFilm (TF) 50 g·L Wilt-Pruf (WP) mitigated from synthetic auxin herbicides. Dicamba was applied a rate corresponding 1/200 the manufacturer’s labeled 0.56 kg ae/ha 1.06 ae/ha, respectively. At 2 weeks after treatment (WAT), treated ML WP before either herbicide exhibited symptoms, but they always less severe than those alone for both cultivars. However, shoot length measurements indicated that none antitranspirants consistently provided protection against WAT. By 12 WAT, used increased number live reproductive organs compared Floral abortion also reduced when by Although did not provide complete injury, concept using film-forming barriers may be useful mitigating some short-term effects drift plants.