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Outline

1	Determining Sublethal Glyphosate Rates for Fresh Market Tomato B.M. Santos J.P. Gilreath C.E. Esmel M.N. Siham
2	Introduction Widely used herbicide Residues present on polyethylene mulch Glyphosate like injuries Low concentrations of paraquat
3	Hypothesis Low glyphosate concentrations will not decrease tomato fruit weight or plant growth
4	Objectives if low concentrations are responsible for injury in tomato the severity of damage inflicted upon tomato
5	Materials and Methods Six glyphosate concentrations 0, 25, 50, 100, 150, and 200 mg/L RCB with 6 replications Plasticulture with soil fumigation FL-47
6	Variables Measured Plant height at 2, 4, and 6 WAT (weeks after transplanting) Plant vigor at 2, 4, and 7 WAT Fruit harvest at 9, 11, and 12 WAT ANOVA and regression analysis with SAS
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10	Conclusions 2% of the field application rate reduced fruit weight, plant height, and plant vigor Multi-use sprayers or contaminated chemicals containing glyphosate residues