South African Avocado Growers’ Association

2012 Yearbook

Volume 35

Table of Contents

POSTHARVEST

8          Effects of harvest maturity, storage temperature, controlled atmosphere and SmartFresh on the post-harvest vascular staining disorder of ‘Maluma’ avocado fruit
SD Mhlophe and FJ Kruger

12        Respiration and softening rates of ‘Maluma’ and ‘Ryan’ avocados and the effect that cold chain breaks have on the ripening and quality of these cultivars
FJ Kruger and D Lemmer

22        Effects of low temperature storage and cold chain breaks on anti-oxidants and C7 sugars in ‘Fuerte’ avocados from South Africa
A Lütge, I Bertling and JP Bower

28        The physiological effects of ultra-low temperature shipping and cold chain break on ‘Hass’ avocados
RD Kok, JP Bower and I Bertling

34        Interaction of storage, ethylene and ethylene inhibitors on post-harvest quality of ‘Maluma’
AA Ernst

42        Investigation into the current rind lesion problems experienced with the ‘Pinkerton’ cultivar
FJ Kruger

47        Does orchard soil moisture content at the time of harvest infl uence the post-storage ripening pattern of ‘Hass’ avocado fruit?
FJ Kruger and LS Magwaza

54        Has the quality of South Africa’s export avocados deteriorated in recent years? Comparing fruit quality for the 2011 and previous export seasons
RM Nelson

ENTOMOLOGY

60        Modelling possible avocado bug outbreaks using a practical GIS reporting system
AJ Alberts

PATHOLOGY

63        Evaluation of ultra-low volume fungicide applications for the control of diseases on avocado fruit – Results from the 2010/11 season
JM van Niekerk and ZS Mavuso

69        Systemic resistance inducers applied pre-harvest for anthracnose control in ‘Fuerte’ avocados
RJ Bosse, JP Bower and I Bertling

72        Development of a more effective post-harvest treatment for the control of post-harvest diseases of avocado fruit – Results from 2011
ZS Mavuso and JM van Niekerk

HORTICULTURE

76        Detection of pre-harvest cold damage in avocado fruit using an online near-infrared spectrometer
RJ Blakey

79        Calibrating avocado irrigation through xylem water potential measurements – Preliminary report
NJR Roets, SP Schoeman, RB Cronje and NR Murovhi

84        Soil health, fruit yield, quality and nutritional value of avocado as influenced by different mulch types – Year 2 of 3
B Nzanza and P Pieterse