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Control of jujube witches': Broom by post-harvest trunk injection of oxytetracycline



Control of jujube witches': Broom by post-harvest trunk injection of oxytetracycline



Journal of Korean Forestry Society 82(1): 12-16



Post-harvest trunk injection of oxytetracycline-HCl (OTC) was attempted for the control of jujube witches' -broom. Diseased jujube (Zizyphus jujuba) trees with 9 to 16cm trunk diameters were treated with OTC ranged from 29 to 6g according to the size of trunk diameter, OTC dissolved in 0.51 or 1.01 of water was transfused into diseased trees by gravity flow injection during September and October. All these OTC concentrations prevented symptom development for two growing seasons and restored previously severely diseased trees to normal conditions. There was no differences in control effect between 0.51 and 1.01 OTC solutions. With these high OTC concentrations, no phytotoxicity was observed in the new leaves of the following year, Mycoplasma-like organism (MLO)-specific fluorescence was absent in the phloem of recovered tissue when examined by fluorescence microscopy using DAPI (4'-6-diamidino-2-phenylindole. 2HCl) staining, indicating the disappearance of MLO by the action of OTC.

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Accession: 008386215

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