Exploring non-traditional products for management of postharvest anthracnose and stem end rot in avocado

Smith, L. A., Dann, E. K., Leonardi, J., Dean, J. R. and Cooke, A. W. (2011). Exploring non-traditional products for management of postharvest anthracnose and stem end rot in avocado. In: 7th World Avocado Congress 2011 - Conference Proceedings. 7th World Avocado Congress 2011, Cairns, QLD, Australia, (215-221). 5-9 September 2011.

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Name Description MIMEType Size Downloads
Author Smith, L. A.
Dann, E. K.
Leonardi, J.
Dean, J. R.
Cooke, A. W.
Title of paper Exploring non-traditional products for management of postharvest anthracnose and stem end rot in avocado
Conference name 7th World Avocado Congress 2011
Conference location Cairns, QLD, Australia
Conference dates 5-9 September 2011
Proceedings title 7th World Avocado Congress 2011 - Conference Proceedings
Publisher World Avocado Congress
Publication Year 2011
Start page 215
End page 221
Total pages 7
Collection year 2012
Language eng
Formatted Abstract/Summary There are many products available which may be effective in reducing postharvest fruit disease (anthracnose and stem end rot) of avocado, but which have not been rigorously tested. While some of these are fungicides registered in other crops, others are purported to be “organic” fungicides and some may not be directly fungicidal, but rely on alternative mechanisms of action on the plant or pathogen. We tested the efficacy of several products in postharvest dipping and field spray trials in avocado. "Hass" fruit dipped in fungicides prochloraz (the standard practice in Australia), fludioxinil, NaturalGreen® or EcoCarb®, resulted in significantly less anthracnose developing in fruit than in water-dipped controls. Only the fungicide treatments resulted in significantly less stem end rot. In subsequent trials with "Hass" and "Reed" disease levels were lower and there were no significant treatment effects, however the most marketable fruit were from the fungicide and EcoCarb treatments. Field trials with "Hass" showed that spray applications of mancozeb fungicide (not registered for avocado in Australia), copper + azoxystrobin (standard industry program) or "Product A", significantly reduced anthracnose. Stem end rot was the least severe in fruit treated with standard fungicides or Product A. The most marketable fruit were from the standard industry fungicide treatments, however there were slightly more marketable fruit from mancozeb, Product A and NaturalGreen treatments compared to water and other treatments. EcoCarb, Aminogro® and Bion® field sprays were not effective. NaturalGreen had effects on skin N, Ca, K and Mg. 
Keyword Avocado
Postharvest disease
Anthracnose
Colletotrichum gloeosporioides
Stem end rot
Botryosphaeria spp.
Q-Index Code EX
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Pests & Disease: Fruit & root diseases and their management

Document type: Conference Paper
Collections: Non HERDC
Queensland Alliance for Agriculture and Food Innovation
 
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Created: Fri, 03 Feb 2012, 13:15:30 EST by Dr Elizabeth Dann on behalf of Qld Alliance for Agriculture and Food Innovation