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



New Zealand Plant Protection 68 (2015): 264-274

Evaluation of fungicides for control of bitter and sprinkler rots on apple fruit

K.R. Everett, I.P.S. Pushparajah, J.T. Taylor, O.E. Timudo-Torrevilla, T.M. Spiers, A. Ah Chee, P.W. Shaw and D.R. Wallis

ABSTRACT

Bitter rot is an apple fruit disease most commonly caused in New Zealand by the fungus Colletotrichum acutatum. The timing of fungicide applications to manage this disease was investigated during two seasons. Fungicides applied during October (carbendazim), or November and December (tolyfluanid, captan and mancozeb), reduced incidence of rots expressing on trees in the orchard. Fungicides (half-strength copper oxychloride, Bacillus subtilis QST 713 and tolyfluanid) applied during January and February reduced the incidence of postharvest rots. Bacillus subtilis QST 713 applied regularly throughout the season reduced incidence of field rots, but was not effective when the number of applications was reduced. Calcium chloride (CaCl2) or copper oxychloride applied during November and December reduced the incidence of sprinkler rots caused by Phytophthora cactorum.

Keywords: fungicides, field trials, Colletotrichum acutatum, Phytophthora cactorum, sprinkler rots.

Related articles
pdfThe influence of nutrition, maturity and canopy density on the incidence of apple bitter rot
K.R. Everett, O.E. Timudo-Torrevilla, R.W.A. Scheper, P.W. Shaw, P.N. Wood, D.C. Mundy and D.R. Wallis (2016)
New Zealand Plant Protection 69: 99-110
pdfControl of flyspeck (Schizothyrium pomi) on Actinidia arguta kiwifruit
C.E. McKenna, R.A. Fullerton, S.J. Dobson and Y. Jia (2012)
New Zealand Plant Protection 65: 213-217
pdfField evaluation of fungicides to control postharvest rots of avocados in New Zealand
K.R. Everett, H.A. Pak, I.P.S. Pushparajah, J.T. Taylor, M.S. Astill, D.B. King (2011)
New Zealand Plant Protection 64: 112-118
pdfField testing alternatives to copper for controlling avocado fruit rots
K.R. Everett, O.E. Timudo-torrevilla, G.N. Hill and T.E. Dawson (2008)
New Zealand Plant Protection 61: 65-69
pdfFungicide timing for control of summer rots of apples
K.R. Everett, O.E. Timudo-Torrevilla, J.T. Taylor and J. Yu (2007)
New Zealand Plant Protection 60: 15-20
pdfIn vitro fungicide testing for control of avocado fruit rots
K.R. Everett and O.E. Timudo-Torrevilla (2007)
New Zealand Plant Protection 60: 99-103
pdfTaxonomy of fruit-rotting fungal pathogens: what's really out there?
P.R. Johnston, S.R. Pennycook and M.A. Manning (2005)
New Zealand Plant Protection 58: 42-46
pdfTesting efficacy of fungicides against postharvest pathogens of avocado (Persea americana cv. Hass)
K.R. Everett, S.G. Owen and J.G.M. Cutting (2005)
New Zealand Plant Protection 58: 89-95

Copyright © 2015 New Zealand Plant Protection Society (Inc.).

Please refer to the terms of use.