South African Avocado Growers’ Association
2016 Yearbook
Volume 39 

Table of Contents

  

4          Chairman’s Report
K Eloff

ENTOMOLOGY

6           The influence of plant volatiles on some indigenous heteropterans in avocados
 FA Botha, BM Botha and PS Schoeman

13          Stink bug control in avocados: The past, the present and the future
  SP Schoeman

19          Indigenous host plants for economic important fruit fly species in South Africa
  T Grové, K de Jager, MS de Beer and K Hannweg

24          Progress on entomopathogenic nematodes (EPNs) for the control of false codling moth Thaumatotibia leucotreta (Lepidoptera: Tortricidae) in avocado orchards in South Africa
  WP Steyn, MS Daneel, MM Slabbert and AP Malan

PATHOLOGY

30          Phosphite treatments as part of early preventative control of Phytophthora root rot, pre- and post-planting
               M Grobler, J Meyer and J Liebenberg

37          Bark and soil penetrants used in alternative application methods of phosphonate for the control of Phytophthora root on avocado
               M Grobler, J Meyer, JJ Serfontein and J Liebenberg

44          Using plant volatiles in biodegradable sachets and exposure of volatiles under pallet covers to control postharvest decay in avocados
               M Bill, PC Obianom, L Korsten, Z Mavuso, Z van Rooyen and D Sivakumar

51          The efficacy of combined application of edible coating and moringa extract in enhancing fruit quality in avocado (Persea americana Mill)
               SZ Tesfay

60          Evaluating foliar phosphonate sprays as an alternative to trunk injections for controlling avocado root rot preventatively – Preliminary report
              A McLeod, P Novela, P Pieterse, I Beukes, S Masikane and JPB Wessels

HORTICULTURE

64          Relationship between fruit pulp mineral composition and the ripening profiles of South African ‘Hass’ avocado fruit
               FJ Kruger, O Volschenk and D Lemmer

70          Finding the best polliniser for ‘Hass’ avocado and the effect of honeybees as pollinators
               MM Bezuidenhout, ES du Toit and PJ Robbertse

76          Avocado orchard soil surface crusting and PAM
               GP Nortjé and SF Schoeman

80          Growing avocados under shadenetting – Year 3
               RJ Blakey, Z van Rooyen, JS Köhne, KC Malapana, E Mazhawu, SZ Tesfay and MJ Savage

84          Irrigation of avocado in South Africa: A review
               NJR Roets

92          A look into the variability of prochloraz residues in the avocado industry
               MS Daneel, A Sippel, M de Beer and J Mlimi

POSTHARVEST

100        Effect of 1-MCP, production region, harvest time, orchard slope and fruit canopy position on ‘Hass’ avocado colour development during ripening
               N Mathaba, S Mathe, SZ Tesfay, TP Mafeo and R Blakey

106        Firmness retention properties of ripened ‘Maluma’ avocado fruit
               FJ Kruger, D Lemmer and O Volschenk

112        Review of 30 years postharvest research
               J Bezuidenhout

117        Development of storage protocols for ultra-late season ‘Lamb Hass’ and ‘Reed’ avocado fruit
               FJ Kruger, D Lemmer and O Volschenk

124        Influence of photo-selective shade netting to improve fruit quality at harvest and during postharvest storage
               PP Tinyane, M Makwakawa, Z van Rooyen, D Sivakumar

130        Intra-seasonal variation in the ripening rates of South African avocados stored at different temperatures
               FJ Kruger and D Lemmer