Citrus Research and Education Center , University of Florida , 700 Experiment Station Road , Lake Alfred , Florida 33850 , United States.
Indian River Research and Education Center , University of Florida , 2199 South Rock Road , Fort Pierce , Florida 34945 , United States.
J Agric Food Chem. 2019 Nov 13;67(45):12393-12401. doi: 10.1021/acs.jafc.9b05108. Epub 2019 Nov 5.
Accumulation of toxic copper in soil and development of copper-resistant pests are emerging challenges currently faced by the agricultural community worldwide. As an alternative, we have developed a ternary zinc chelate solution (TSOL) pesticide where zinc ions are the primary active ingredient. The material is composed of zinc, urea, and hydrogen peroxide. Urea was chosen as it is widely used as a plant fertilizer and can also bind to both zinc and hydrogen peroxide. No phytotoxicity was observed with TSOL on Meyer lemon () seedlings at a field spray rate of 800 μg/mL Zn metal concentration. Antimicrobial studies showed that TSOL exhibited improved killing efficacy against and compared to Zn ions alone. Citrus canker field trials in a grapefruit () grove over three years showed that TSOL provided comparable disease protection to copper products at an equivalent or lower metal content.
有毒铜在土壤中的积累和抗铜性害虫的发展是当前全球农业社区面临的新兴挑战。作为一种替代方法，我们开发了一种三元锌螯合物溶液（TSOL）农药，其中锌离子是主要的活性成分。该材料由锌、尿素和过氧化氢组成。选择尿素是因为它广泛用作植物肥料，并且可以与锌和过氧化氢结合。在田间喷雾率为 800μg/mL Zn 金属浓度下，TSOL 对 Meyer 柠檬（）幼苗没有表现出植物毒性。抗菌研究表明，与单独的锌离子相比，TSOL 对 和 的杀灭效果有所提高。三年来在葡萄柚（）果园进行的柑橘溃疡病田间试验表明，TSOL 在相同或更低的金属含量下，提供了与铜产品相当的疾病保护。
