South African Avocado Growers’ Association

2006 Yearbook

Volume 29

Table of Contents

POSTHARVEST

10        Extended storage trials with South African avocados
D Lemmer, R T Malumane, J Ntandane and F J Kruger

14        Is the quality of South African avocado improving?
The 2005 export season – how fruit quality compared with previous seasons’ results
R M Nelson

HORTICULTURE

21        Possible causes and measures to prevent excessive leaf abscission in the avocado (Persea americana Mill.) cultivar Ryan
N J R Roets, S de Meillon, C Kaiser, P J Robbertse, R Owen and R Ehlers

38        Avocado sugars during early fruit development
I Bertling and J P Bower

ROOTSTOCKS AND CULTIVARS

41        Evaluation of the Hass-like avocado cultivars Harvest, Gem and Grace
A T Bruwer and M L Mokgalabone

ENTOMOLOGY

42        “Sagte” insekdoders vir die beheer van suigbesies gedurende die middel tot laat somer – finale verslag
I J Bruwer

PATHOLOGY

48        A predictive model for biological control of Cercospora spot: Effect of nutrient availability
M van Eeden and L Korsten

53        Alternative control of Cercospora spot on Fuerte – Progress report
A Willis

58        Efficacy of water soluble silicon against Phytophthora cinnamomi root rot of avocado: A progress report
T F Bekker, C Kaiser and N Labuschagne

64        In vitro inhibition of several phytopathogenic fungi from avocado by soluble potassium silicate
T F Bekker, C Kaiser and N Labuschagne

PHYTOSANITARY

69        Effect of fruit coatings and packaging on chilling injury of ‘Hass’ avocados
J P Bower and G Papli