NZPPS   ·  Journal home   ·   Past issues  ·  This volume   ·   Previous abstract   ·   Next abstract



New Zealand Plant Protection 69 (2016): 207-212

Protection of budding wounds in apple nursery trees from European canker

R.W.A. Scheper, O.D. Stevenson and D.I. Hedderley

ABSTRACT

The fungus Neonectria ditissima can cause European canker in apple nursery trees. In this study, ten treatments of 'EMLA 9' rootstocks budded with 'Royal Gala' were examined, 5 Treatments included combinations of five budding tapes, two budding methods and three fungicidal treatments. Fifteen months after inoculation, all T-budded trees had died. Chipbudded trees inoculated after tying with either Flexiband type C or plastic pre-cut strips displayed significantly more canker (21% and 22%, respectively) than those tied with Buddy tape (11%, P<0.001). Of the uninoculated trees, 9% displayed canker symptoms, because either the budding wounds were infected by natural inoculum, or the infection was present in the scion or rootstock before budding. Treating buds with tebuconazole/carbendazim reduced canker symptoms significantly (2%, P<0.001). Calcium hydroxide also reduced canker symptoms (5%). Pyraclostrobin/boscalid did not reduce canker incidence.

Keywords: Neonectria ditissima, apple, propagation, nursery tree, budding, budding tapes, wound protection.

Related articles
pdfHot water disinfection treatment to eliminate Neonectria ditissima latent infections in apple scion wood
N.T. Amponsah, B.M. Fisher M. Walter, L. Frijters, D.I. Hedderley and R.W.A. Scheper (2016)
New Zealand Plant Protection 69: 221-229
pdfHow many conidia are required for wound infection of apple plants by Neonectria ditissima?
M. Walter, S. Roy, B.M. Fisher, L. Mackle, N.T. Amponsah, T. Curnow, R.E. Campbell, P. Braun, A. Reineke and R.W.A. Scheper (2016)
New Zealand Plant Protection 69: 238-245

Copyright © 2016 New Zealand Plant Protection Society (Inc.).

Please refer to the terms of use.