A Comparison of Tree Trunk Injection and Implantation of Zinc Capsules for Correction of Zinc Deficiency    (View PDF)

Ray E. Worley, R.L. Littrell, and J.D. Dutcher

Abstract: Zinc sulfate was applied to pecan tree trunks through implants and pressure trunk injection. Small amounts of chelated Zn solution were also injected by means of small pressurized cartridges. The most effective and efficient method for rapid correction of Zn deficiency of pecan when measured by leaflet Zn concentration was by pressure trunk injection using 8 liters per tree of solution containing 1 g of ZnSO4/2.5 cm of trunk circumference. Pressure trunk injection was the only method which produced adequate leaflet Zn concentrations in September. Implants of equivalent amounts of ZnSO4 increased leaflet Zn over the control by September, but leaflets were still Zn deficient and phytotoxicity of trunk cambium tissue occurred. Pressurized cartridges were ineffective due to the small amount of Zn provided.

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https://doi.org/10.48044/jauf.1980.060