Wound reaction to trunk injection of oxytetracycline or water in huanglongbing-affected sweet orange (Citrus sinensis) trees

Abstract Key message Trunk injection causes injury to trees and best practices must be established for use of this technology manage vascular diseases such as huanglongbing. is a technique applying plant protection compounds that has demonstrated efficacy management huanglongbing (HLB), bacterial disease which devastated the Florida citrus industry. Recently, antibacterial oxytetracycline been approved trunk in Florida. Despite its potential restoring health HLB-affected trees, little information available on trees’ ability heal compartmentalize wounds caused by interaction with season other factors. In study, 5-year-old sweet orange ( Citrus sinensis ) were injected bi-monthly measure seasonal differences rate uptake water compare external internal wound reaction both scion rootstock. Also investigated was after an injectable formulation oxytetracycline. Injection during spring summer promoted more rapid closure compared fall or winter, into less damaging than Although effectively compartmentalized inflicted water, impeded healing increased damage. Application fungicide pruning sealant size internally externally. For adopted commercial orchards, benefits outweigh risks wounding associated application method. This study provides first insight some utilizing crop strategy.