Insecticide Resistance Action Committee (IRAC) meeting

2019-10-09 13:45:00

The last IRAC meeting for 2019 took place on 3 October 2019 in Potchefstroom.

The Committee was updated on the following matters from the macadamia industry by Dr Elrea Strydom (SAMAC), Mr Barry Christie (Green Farms Nut Company), Dr Elsje Joubert (Malumna Boerdery) and Dr Schalk Schoeman (ARC-Tropical and Sub-Tropial Crops) who were all in attendance:

  • Thrips remain a problem on both macadamia and avocado.
  • Stink bugs are observed four to five days post-spraying with pyrethroids, and resistance is thus a problem.
  • The macadamia felted coccid is spreading significantly. The initial infestation was on young trees, but mature trees up to 20 km from the primary infestation site have been infected. It is probable that infestations are present between these sites, which growers are not aware of.
  • Mosquito bugs are a significant problem in Mozambique and Zambia, and affect the young flush as well as the flowers.
  • The macadamia industry needs an alternative chemical which is fast-acting but which breaks down quickly registered for scouting purposes as Dichlorovos has been deregistered.
  • The Committee was also informed of the successful Bee Forum meetings SAMAC has hosted in Nelspruit.

There is great concern within the industry regarding the registration of chemicals under Act 36 of 1947. A label extension takes approximately 418 days, while 627 days are required for the registration of a new active. Growers are concerned that chemical companies will increasingly decide to not register their products in South Africa as a result of the time it takes to get a project registered and the large finacial losses associated with this. The office of the Registrar is facing serious funding and capacity issues, and thus organizations such as CropLife are in talks to support the Registrar's office with funding and manpower.

SAMAC will continue to represent the industry's interests at this forum in the new year.