Effect of heat or chemical disinfection on the viability of ‘Fuji’ apple graft wood


  • Brent M. Fisher Plant & Food Research
  • Duncan I. Hedderley Plant & Food Research
  • Nicholas T. Amponsah Plant & Food Research
  • Reiny W.A. Scheper Plant & Food Research




Bundles of dormant wood were submerged in water (45?C for 45 min or 50?C for 15 min), or were wrapped in moist cloth, placed inside zip-locked bags and submerged for 3—6 h or treated with one of three GRAS chemicals or untreated (two bundles per treatment). Scion wood was grafted onto ‘M9’ rootstocks then planted in a randomised order, with growth assessed after 16 weeks. Two of the GRAS treatments and submersion at 45?C for either 45 min or 3 h in a bag did not significantly affect viability compared with the untreated control (83—95% viable). Submersion at 50?C for 15 min reduced viability significantly (70%). Scions did not survive exposure to 50?C for 3—5 h in bags (P<0.001).  No significant differences in mean scion shoot length were observed between the untreated wood (107 cm) and that submerged in 45?C water for 45 min, 3 h in a bag, or GRAS-treated. Wood treated at 45?C for 5—6 h in a bag or at 50?C for 15 min had significantly shorter shoots (54—75 cm, P<0.001). Dormant ‘Fuji’ wood remained viable after treatments known to eliminate pathogens from wood.



How to Cite

Fisher, B. M., Hedderley, D. I., Amponsah, N. T., & Scheper, R. W. (2018). Effect of heat or chemical disinfection on the viability of ‘Fuji’ apple graft wood. New Zealand Plant Protection, 71, 354. https://doi.org/10.30843/nzpp.2018.71.213



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