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Research Symposium 2016 Presentations

Prof Bernard Slippers_FABI

Prof. Bernard Slippers – 08:40

The power of successful industry-macadamia collaborations: Critical mass, leverage and impact.

Mark Penter_Cultivars

Mark Penter – 09:15

Selection and evaluation of new cultivars for the South African macadamia industry.

Willem Steyn_EPNs

Willem Steyn – 09:35

Investigations into the use of EPN’s for the possible control of the nut borer complex and the impact of it on the thrips complex occurring on macadamias in South Africa

Maritha Schoeman_Huskrot

Maritha Schoeman – 09:55

Evaluation of fungicides for controlling husk rot in macadamias.

Alex Whyte_GFNC Sponsor

Green Farms Nut Company – 10:15

Prestige Sponsor Presentation by Alex Whyte

Dr Gerhard Verdoorn_Chemicals

Dr. Gerhard Verdoorn – 11:00

Pesticide use in macadamias: Important factors to consider.

Mark Penter_Discolouration and Rancimat

Mark Penter – 11:35

Discolouration of SA macadamias and Rancimat as a tool for kernel shelf-life predictions and determination of risk factors affecting quality and shelf-life in the harvest and storage of macadamias.

Dr Schalk Schoeman_IPM

Dr. Schalk Schoeman – 11:55

Integrated management of macadamia pests.

Prof Peter Taylor_Bat stinkbug control

Prof. Peter Taylor – 12:15

New Findings on the potential for bats to control lepidopteran pests of macadamias.

De Villiers Fourie_Resistance

De Villiers Fourie – 12:30

Investigation of possible pyrethroid resistance developing in the two-spotted stinkbug, Bathycoelia Distincta, on macadamias in South Africa.

Stephan Schoeman_Surface Crusts

Stephan Schoeman – 12:40

Breaking surface crusts in macadamia orchards.

Prof Ben Botha_Pheromones re

Prof. Ben Botha – 14:35

Development of synthetic pheromones for the control of stinkbug.

Lindi Botha_Rearing stink bugs

Lindi Botha – 14:55

Rearing of stinkbugs: some interesting and possible useful observations.

Andre Botha_Traps

Andre Botha – 15:10

Evaluating pheromone traps for stinkbugs.

Colleen Hepburn_Stored Product Pests

Colleen Hepburn – 15:20

Awareness of stored product pests.

Nontokozo Kunene_Phytophthora

Nontokozo Kunene – 15:30

Let your soil speak for you…Are you Phytophthora free?

Christiaan Saaiman_Harvest

Christiaan Saaiman –

New app development for farming data – Harvest


The great nut robbery: These machete-wielding gangs don’t want cash

Posted on: News24.com – 2017-04-13 10:18

Harare – Police in Zimbabwe’s southern Chipinge district have had to help farmers step up security after machete-wielding robbers began targeting a new and lucrative loot: macadamia nuts.

The state-controlled Manica Post says in its latest edition that police in the area have seized tons of stolen macadamia nuts since last month.

Brazen robbers armed with machetes, knobkerries and catapults are no longer bothering to wait until night to stage their attacks on farmers, but hitting farmers during the daytime, says the report.

“Every day, we are recovering macadamia nuts from robbers and we are handling more reports of theft,” police spokesperson Daniel Mhini told the newspaper.

The paper said the nuts had a value of $2-4 per kg.

Farmer Simon Sithole told the Manica Post: “We are living in fear, as some of our workers are being assaulted every day by some of the robbers.”

Production of macadamia nuts began in Zimbabwe around 2000. In some cases it can be more profitable than tobacco, farmers have said.

Taken from: http://www.news24.com/Africa/Zimbabwe/the-great-nut-robbery-these-machete-wielding-gangs-dont-want-cash-20170413


South African Macadamia Crop – Media Release – May 2017


The Southern African Macadamia Growers’ Association has conducted a round of data collection from approximately 80% of the registered handlers representing approximately 95% of the macadamia industry’s total production volume. The updated forecast is 41 430 tons of nut-in shell (1.5% kernel moisture content), which is slightly lower than the previous forecast of 42 000 tons. It is suspected that many new plantings will come into production for the first time, resulting in a slight increase in production from 2016. The macadamia industry is still suffering the effects of a severe drought that lead to a crop of 38 000 tons in 2016, compared to 46 000 tons that were produced in 2015. Mpumalanga remains the largest production region with 51% of the forecasted volumes predicted to come from this province, followed by Limpopo (26%) and KwaZulu-Natal (21%). The remaining 3% of the crop is expected to come from other regions such as the Eastern and Western Cape Provinces. An updated forecast will be done during June 2017.

New data has also been received from macadamia nurseries on their 2016 tree sales volumes. The new data, received from approximately 90% of the nurseries and representing approximately 95% of the industry, shows that 1 132 110 macadamia trees were sold in South Africa during 2016. This is the equivalent of 3 538 hectares at a planting density of 320 trees per hectare. ‘Beaumont’ remains the most-widely planted cultivar, comprising 49% of the total sales, followed by A4 (22%) and 816 (16%). Mpumalanga remains the province with the most new plantings, absorbing 49% of the total trees produced, followed by KwaZulu-Natal (33%), Limpopo Province (10%), Western Cape (3%) and other destinations (5%). In 2016 it was reported that more than 70% of trees were sold in Mpumalanga during 2015. It is evident that the growth in new plantings in KwaZulu-Natal is on the increase and it is suspected that this will be the future.

Issued by the Southern African Macadamia Growers’ Association (SAMAC)

29 May 2017

Contact: Barry Christie

Tel: +27 73 084 1772





Below is an email from the Scientific and Technical Projects Manager at the International Nut and Dried Fruit Council, Irene Gironès regarding a call for proposals as well as project guidelines on health research on macadamias.

Dear Sir/Madam,

I am pleased to inform you that the macadamia community just launched a new Call for Research Projects that may contribute to enhance the understanding of the health effects of macadamia nut consumption, and we are inviting researchers to submit project proposals.

Research priorities: Comparing the effect of a macadamias enriched diet vs. a control diet on insulin resistance/secretion, lipid profile (total cholesterol, LDL cholesterol, HDL cholesterol and triglycerides), and other emergent cardiovascular risk factors, e.g. inflammation, oxidative stress markers, etc. including the evaluation of the effects of macadamia nut consumption on adiposity.

200,000 EUR is available for the Macadamia Health Research. Applications due by 28 February 2017.

The Guidelines and the Application Form are available online at http://www.nutfruit.org/what-we-do/health-nutrition/funding-opportunities/.

We would very much appreciate if you could share the news with researchers, universities and research institutions in your country.

Should you need any further information, please do let me know.

Thank you and Best regards,

Irene Gironès

Scientific and Technical Projects Manager


International Nut and Dried Fruit Council

Carrer de la Fruita Seca, 4
Polígon Tecnoparc

43204 REUS, Spain

Tel.: +34 977 331 416

Fax: +34 977 315 028





Disease Alert: Husk Rot

Husk rot of macadamia is not a new disease, and especially not new in South Africa. However, our members should be aware that the disease is becoming more widespread. This was anticipated, since macadamia is a relatively new crop to South Africa. It can therefore be predicted that the disease will become more prevalent and have greater economic impacts in the near future. Husk rot is caused by several fungal species, amongst others Colletotrichum gloeosporioides and Phomopsis spp. It can also be predicted that new, possibly even undescribed diseases will be seen in the future. Make sure that you scout your orchards on a regular basis and to control the disease when necessary. Please note that husk rot is not to be confused with husk spot, which is caused by a different pathogen (Pseudocercospora macadamiae). Control of the pathogen includes cultural and chemical methods. Visit the members’ section of the SAMAC website for a list of registered chemicals. Always follow label instructions and only spray registered products. A short article on the subject also appeared in Vol 15 of the Subtrop Journal in 2016 (CLICK HERE TO VIEW THE ARTICLE). Curative control might not be achievable, but further spread of pathogens should be avoided. Below are pictures of what the symptoms may look like, depending on the stage of development of the disease and/or the nut.



Introduction to Macadamia Production

A one day course (including orchard visit) highlighting all aspects kzn-mac-course-nov-dec-2016-booking-form
aspects of macadamia production from young tree planting through to tree management.

Essential for all new macadamia growers throughout KZN.

R600 for SAMAC members; R850 for non-SAMAC members.
Includes course manual to keep, refreshments and lunch.

NORTH COAST: Tuesday 29 November
Felixton Country Club

SOUTH COAST: Thursday 01 December
Riverbend Crocodile Farm

To book your place complete the form – DOWNLOAD FORM
and email to kk@subtrop.co.za & jaques@subtrop.co.za .

Places are limited so early booking is essential!