ARS | Publication request: Evaluation of phytotoxicty of quinoxyfen on fresh market tomatoes, 2011

Submitted to: Plant Disease Management Reports
Publication Type: Research Technical Update
Publication Acceptance Date: January 29, 2013
Publication Date: N/A

Interpretive Summary: This experiment was conducted inTifton, Georgia to evaluate the phytotoxicity of quinoxyfen on fresh market tomatoes in 2011 for the control of bacterial spot and powdery mildew. Four directed foliar applications were applied on a 6-8 day schedule beginning on 19 May and ending on 8 Jun 2011at rates of 8.0 fl oz/A (1x) and 16.1 fl oz/A (2x). Phytotoxicity was evaluated on 15, 21, and 28 Jun 2011 using a scale of 0-10 (0 = no injury and 10 = dead plants). Fruits were harvested from randomly chosen plants on 28 Jun 2011 with the number and weight of marketable fruits determined. No phytotoxicity was observed on the plants for any of the treatment rates (0 for all ratings). No stunting, fruit finish injury, or foliage injury was observed. There were no differences among the treatments or the control in yield of fruit according to weight or number.

Technical Abstract: This experiment was conducted inTifton, Georgia to evaluate the phytotoxicity of quinoxyfen on fresh market tomatoes in 2011 for the control of bacterial spot and powdery mildew. Four directed foliar applications were applied on a 6-8 day schedule beginning on 19 May and ending on 8 Jun 2011at rates of 8.0 fl oz/A (1x) and 16.1 fl oz/A (2x). Phytotoxicity was evaluated on 15, 21, and 28 Jun 2011 using a scale of 0-10 (0 = no injury and 10 = dead plants). Fruits were harvested from randomly chosen plants on 28 Jun 2011 with the number and weight of marketable fruits determined. No phytotoxicity was observed on the plants for any of the treatment rates (0 for all ratings). No stunting, fruit finish injury, or foliage injury was observed. There were no differences among the treatments or the control in yield of fruit according to weight or number.