EPA has issued a specific exemption under the provisions of Section 18 of the Federal Insecticide, Fungicide, and Rodenticide Act to the Florida Department of Agriculture and Consumer Service for the use of FireWall 50 WP to control citrus canker (Xanthomonas citri subsp. citri) on up to 54,000 acres of fresh market grapefruit grown in the Sunshine State.
Independent field trials using FireWall have been conducted by Dr. Jim Graham, UF/IFAS Citrus Research and Education Center in Lake Alfred. Graham reports these trials have demonstrated that “alternation of FireWall with a reduced rate of copper provided a similar reduction in diseased fruit with less copper burn (phytotoxicity) than the full rate of copper and that the residual activity of FireWall is greater than copper under tropical weather conditions.”
The current specific exemption is for FireWall 50 WP on commercially grown grapefruit in Florida for control of citrus canker. FireWall 50 WP is equivalent to FireWall 17 WP, except that it has a higher concentration of active ingredient.
Refer to the FireWall 50 WP Section 18 label for additional information and/or restrictions regarding its application to Florida grapefruit.
For more information about FireWall, visit Agrosource.net.