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Andy Robinson

Potato Extension Agronomist

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Results of Intended Herbicide Injury at the Winter Test

Potato plants that received dicamba and glyphosate treatments during the mid-bulking stage in 2013 were planted at the winter test in Homestead, FL. After 7+ weeks they were evaluated for damage and growth inhibition. The lower dicamba rate, 0.67 oz/acre, caused severe bubbling, leaf crinkling, twisting and bending of leaves as would be expected from a plant growth regulator herbicide. The dicamba treatment of 1.3 oz/acre was probably too much dicamba because few plants emerged under this treatment. Like in soybean and other crops, dicamba can be very active at low rates in potato seed.
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