South African Avocado Growers’ Association
2020 Yearbook
Volume 43

Table of Contents

 

 

5 Chairman's Report

S Magagula

 

HORTICULTURE

 

6 Observations on the effects that row orientation, ridging and orchard altitude have on avocado production in the Tzaneen area
FJ Kruger, GO Volschenk and LC Volschenk

 

11 Water use of avocado orchards – Year 3

E Mazhawu, AD Clulow, MJ Savage and NJ Taylor

 

18 Research towards reducing the incidence of lenticel damage of South African ‘Hass’ export avocado fruit
D Lemmer and JF Fourie

 

52 Concise overview of microbes related to soil health
JJ Bezuidenhout

 

PATHOLOGY

 

58 Investigating phosphonic acid residues in late hanging fruit and in tree roots from trees that received one versus two annual trunk injections
A McLeod, P Novela, P Mohale and S Masikane

 

64 Cercospora spot of avocado – Validation of spray timing: Final results
MH Schoeman and R Kallideen

 

POSTHARVEST

 

70 Preharvest application elicitors as an alternative to prochloraz
M Thema, H Fotouo-M. and D Sivakumar

 

76 Comparison of the ripening inhibitory effects of controlled atmosphere and balanced atmosphere on South African ‘Hass’, ‘Maluma’ and ‘Fuerte’ avocado fruit under laboratory conditions during the 2019 season
FJ Kruger, GO Volschenk and L Volschenk

 

80 Determining how effective a dry ice based modified atmosphere treatment will be at suppressing avocado respiration in packhouse cold rooms and refrigerated trucks
FJ Kruger, GO Volschenk and L Volschenk

 

88 Effects of cultivar, season and altitude on South African avocado fruit’s soluble solid contents and early season quality
FJ Kruger, GO Volschenk and LC Volschenk

 

92 Maturity indexing and storage protocols for ‘Lamb Hass’ and ‘Reed’ avocado cultivars
LS Magwaza, E Cekwane, A Mditshwa and SZ Tesfay

 

106 The impact of farm-to-packing facility road condition on avocado quality
WJ Bezuidenhout, WK Kupolati, J Snyman and E Joubert