Southern Ag Zinc Sulfate Catalog Outdoor, Lawn & Garden Gardening Southern Ag Zinc Sulfate Manufacturer : Southern Ag Description • Corrects blind nut disorder in Pecans • Corrects zinc deficiency (mottleleaf) in avocado, beans, citrus, corn, peaches & nectarines. CONTAINS: Zinc as metallic 31%. USE ON: Trees, shrubs, berry bushes, and fruit trees. CONTROLS: Zinc deficiency, rosette on pecans. RATE: Apply dry at 1.5 lbs. per inch of trunk diameter. APPLICATION: Broadcast evenly over area to be treated and water. Rates Please contact us for current pricing and availability.