South African Avocado Growers’ Association
2022 Yearbook
Volume 45

Table of Contents

3 Chairman's Report
C Garrett

HORTICULTURE

6 Research towards reducing orchard cold damage of ‘Hass’ avocado fruit
D Lemmer, HW Viljoen and JF Fourie

16 First trials aimed at establishing the commercial potential of a 1-Methylcyclopropene tree spray formulation (Harvista; Agrofresh) on avocado fruit
FJ Kruger, GO Volschenk and E Volschenk

PATHOLOGY

24 Supporting crop establishment and trees in established avocado orchards, by way of combined use of biological and chemical solutions
E Jordaan, R Anelich and F Denner

40 Understanding field transmission of Avocado Sunblotch Viroid (ASBVd)
AEC Jooste, LC Motaung, AB Msweli and ZR Zwane

ENTOMOLOGY

44 Evaluation of different integrated pest management strategies for the management of thrips in avocado orchards
E Joubert and C Hoffman

POSTHARVEST

50 Biocontrol of postharvest pathogens infecting avocado using endophytic Trichoderma spp.
L Mkhize and MD Laing

56 Reduction of postharvest avocado fruit decay by optimised rapid hot water treatment
TF Majola and MD Laing

61 Determining minimum maturity levels for ‘Maluma Hass’ – first season results
A Kleinert, E Crouch, D Lemmer, and E Joubert

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

100 Commercialisation of the intermittent carbon dioxide truck treatment developed during recent seasons
FJ Kruger, GO Volschenk and E Volschenk

106 Triangle taste tests performed with low and high-altitude ‘Hass’ fruit at the start of the 2021 export season
FJ Kruger, GO Volschenk and E Volschenk