Johan de Graaf
City of Johannesburg, Gauteng, South Africa
2K followers
500 connections
City of Johannesburg, Gauteng, South Africa
2K followers
500 connections
About
Dr J de Graaf
BSc (Hon), MSc, MBL (Unisa) (cum laude), PhD (Pret), M.Inst.D…
Activity
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Have you ever walked into a hardware store, looked at the sawn timber and wondered how it was produced? To find out, register for the Timber…
Have you ever walked into a hardware store, looked at the sawn timber and wondered how it was produced? To find out, register for the Timber…
Liked by Johan de Graaf
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According to Paul Fast, founder of Fast Epp, increased interest in wood-constructed sports facilities is “absolutely” there, with Fast Epp…
According to Paul Fast, founder of Fast Epp, increased interest in wood-constructed sports facilities is “absolutely” there, with Fast Epp…
Liked by Johan de Graaf
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We announced our full year results for 2024 this morning. Despite the challenges faced, our unwavering commitment to safety, value delivery and…
We announced our full year results for 2024 this morning. Despite the challenges faced, our unwavering commitment to safety, value delivery and…
Liked by Johan de Graaf
Experience
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Education
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University of South Africa, Graduate School of Business Leadership
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Licenses & Certifications
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Member of the Institute of Directors Southern Africa
Institute of Directors in Southern Africa
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Professional Natural Scientist
The South African Council for Natural Scientific Professions
Credential ID Available on request
Publications
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Developing a systems approach for risk mitigation of the mango seed weevil, Sternochetus mangiferae (F.) (Coleoptera: Curculionidae), in South Africa
Journal of Economic Entomology 103: 1577-1585
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Host status of avocado (cv. Hass), Persea americana, to Ceratitis capitata, C. rosa and C. cosyra (Diptera: Tephritidae) in South Africa
Journal of Economic Entomology 102: 1448-1459
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The efficacy of cultural control measures against the banana weevil, Cosmopolites sordidus (Germar), in South Africa
Journal of Applied Entomology 132: 36-44
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Efficacy of pseudostem and pheromone seasonal trapping of the banana weevil Cosmopolites sordidus in South Africa
International Journal of Pest Management 51: 209-218
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Stridulation of Gryllotalpa africana (Orthoptera: Gryllotalpidae)
Florida Entomologist 88: 292-299
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Flight patterns of Gryllotalpa africana (Orthoptera: Gryllotalpidae) in South Africa.
Environmental Entomology 33: 1431-1435
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Seasonal development of Gryllotalpa africana (Orthoptera: Gryllotalpidae) on turfgrass
Florida Entomologist 87: 130-135
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Ecology and control of Neosorius brevipennis (Coleoptera: Staphylinidae) on turfgrass in South Africa
Florida Entomologist 86: 370-372.
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Measuring the effectiveness of research and development on avocado, Persea americana Mill
Submitted for review
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Proceeding papers for symposia, popular articles and other research reports
National and International symposia, growers association yearbooks
More than 30 reports
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Strategic situation analysis of the avocado industry
Submitted for review
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Patents
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Pest control
ZA 2007/01262
Injection of agrochemicals into the banana pseudostem as a novel method of controlling the banana weevil (Cosmopolites sordidus)
Honors & Awards
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Top achiever award - MBL research report
Unisa School of Business Leadership
Top student award for the Unisa MBL research report in 2010
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Performance excellence awards
Westfalia
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Several University achievement bursaries
University of Pretoria
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Prestigious PhD bursaries
National Research Foundation
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Bursaries
Ernst and Ethel Eriksen Trust
Languages
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English
Full professional proficiency
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Afrikaans
Full professional proficiency
More activity by Johan
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To register click here: https://lnkd.in/ds6hGHtQ
To register click here: https://lnkd.in/ds6hGHtQ
Liked by Johan de Graaf
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Exciting news! Deputy Minister of Trade, Industry and Competition, Mr. Andrew Whitfield, emphasised the importance of driving South Africa's economic…
Exciting news! Deputy Minister of Trade, Industry and Competition, Mr. Andrew Whitfield, emphasised the importance of driving South Africa's economic…
Liked by Johan de Graaf
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Would you like to know how the cost of a timber frame house compares with that of a brick-and-mortar house? Register for the Timber Construction…
Would you like to know how the cost of a timber frame house compares with that of a brick-and-mortar house? Register for the Timber Construction…
Liked by Johan de Graaf
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Celebrating Women’s Day at Merensky Timber: Embracing Inclusivity “The Merensky Way” Happy Women’s Day to all the incredible women at Merensky Timber…
Celebrating Women’s Day at Merensky Timber: Embracing Inclusivity “The Merensky Way” Happy Women’s Day to all the incredible women at Merensky Timber…
Liked by Johan de Graaf
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Are we failing to recognise the benefits of stress?
Are we failing to recognise the benefits of stress?
Shared by Johan de Graaf
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“The importance of trees” ✍️ @architecturesight, @07sketches
“The importance of trees” ✍️ @architecturesight, @07sketches
Liked by Johan de Graaf
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#FireSafety #Firefree #DoGood #Merenskytimber Sean Brown Johan de Graaf Mark Frey Deon Breytenbach Dean Naidoo Bronwyn Noble Tammy Makgatho…
#FireSafety #Firefree #DoGood #Merenskytimber Sean Brown Johan de Graaf Mark Frey Deon Breytenbach Dean Naidoo Bronwyn Noble Tammy Makgatho…
Liked by Johan de Graaf
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IKHAYA - Zen The CLT panels were made from a combination of SA Pine and Eucalyptus. CLT: XLAM South Africa Architect: Mano Kalos…
IKHAYA - Zen The CLT panels were made from a combination of SA Pine and Eucalyptus. CLT: XLAM South Africa Architect: Mano Kalos…
Liked by Johan de Graaf
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