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Research Features

Wondafrash M, Slippers B, Asfaw BA, Makowe IA, Jenya H, Bush S, Kayumba I, Nambazimana A, van der Lingen S, Hurley BP.  Tracing the distribution of natural enemies of non-native Eucalyptus insect pests in sub-Saharan Africa. 22nd Congress of the Entomological Society of Southern Africa. 28 June to 1 July 2021.  

Wondafrash M. Pest surveillance. DUT Workshop. 24 May 2021. 

Wondafrash M. Introduction to pests and pathogens. DUT Workshop. 24 May 2021.   

Wondafrash M. Monitoring plant health in South African Botanical Gardens. DUT Workshop. 24 May 2021. 

Paap T. Phytophthora biology, impact, and management. DUT Workshop. 24 May 2021. 

Paap T. Urban tree health. DUT Workshop. 24 May 2021.

Paap T. Polyphagous Shot Hole Borer. DUT Workshop. 24 May 2021.  

Wondafrash M, Wingfield MJ, Slippers B, Hurley BP, Hulbert JM, Wilson JR, Paap T. The value of botanical gardens to biosecurity and plant health research in South Africa. National Symposium on Biological Invasions. 5-7 May 2021. 

Wondafrash M. Plant health in botanical gardens. A webinar. 28th July 2020.

Wondafrash. Monitoring plant health in sentinel sites: botanic gardens and arboreta in South Africa. FABI postdoc seminar, 2nd March 2020, Pretoria. 

Paap T. An update on Polyphagous Shot Hole Borer (PSHB) in South Africa. SANBI Interpretation Officers Meeting, Lowveld National Botanical Garden, 21st of October 2019, Nelspruit.

Wondafrash M. Plant health project in botanic gardens and arboreta in South Africa. SANBI Interpretation Officers Meeting, Lowveld National Botanical Garden, 21st of October 2019, Nelspruit. 

Wondafrash M, Paap T. Sentinel plant research and monitoring PSHB. Beetle Workshop, 1st November 2019, Pretoria.

Wondafrash M, Paap T. Best garden practices and plant health. Free State National Botanical Garden, 1st October 2019, Bloemfontein. 

Wondafrash M, Paap T. Monitoring plant health in botanical gardens and arboreta across South Africa. Seasonal Plant Sale Day in Free State National Botanical Garden, 28th September 2019, Bloemfontein. 

Paap T. Pest and disease management and biosecurity in botanic gardens. A Plenary Talk at Horticulturalists Enrichment Forum at Walter Sisulu National Botanical Garden, September 2019, Johannesburg. 

Wondafrash M, Slippers B, Hurley BP. Distribution and diversity of invasive pests of Eucalyptus in sub-Saharan Africa, 21st Congress of Entomological Society of Southern Africa (ESSA), 8-11 July 2019, Umhlanga. 

Paap T. An update on PSHB in South Africa and emerging plant diseases in Kirstenbosch National Botanic Garden. Presentation at Kirstenbosch National Botanic Garden, June 2019, Cape Town. 

Wondafrash M, Paap T. Monitoring Polyphagous Shot Hole Borer (PSHB) in sentinel sites: botanic gardens and arboreta. (PSHB) Research Network, 28th May 2019, Pretoria.

Wondafrash M. Distribution and diversity of invasive Eucalyptus insect pests and their natural enemies in sub-Saharan Africa, FABI Post Doc Seminar, 8 April 2019, Pretoria.

Paap T. An update on Polyphagous Shot Hole Borer (PSHB) and its fungal symbiont in South Africa. PSHB meeting at eThekwini Municipality, 14th March 2019, Durban.

Paap T, de Beer ZW. Polyphagous Shot Hole Borer in South Africa. European PhD Network “Insect Science” IX Annual Meeting, 14th November 2018, Florence, Italy.

Paap T, de Beer ZW. Polyphagous Shot Hole Borer in South Africa. Presentation to Italian National Research Council (CNR) Institute for Sustainable Plant Protection (ISPP), 13th November 2018, Florence, Italy.

Paap T, de Beer ZW, Burgess TI, Wingfield MJ. Sentinel tree research in botanical gardens of South Africa. COST Action FP1401 Final Meeting: Sentinel plantings for detecting alien, potentially damaging tree pests, 19th Oct 2018, Sursee, Switzerland.

Paap T, de Beer ZW. Polyphagous Shot Hole Borer in South Africa. Presentation to Forest Research, 4th October 2018, Farnham, United Kingdom.

Paap T, de Beer ZW. Polyphagous Shot Hole Borer in South Africa. Institute of Environment and Recreation Management (IERM) Convention, 19th Sep 2018, Durban.

Paap T, de Beer ZW. Polyphagous Shot Hole Borer in South Africa. Intensive Growers Association Biannual Symposium, 19th July 2018, Durban.

Paap T, de Beer ZW. Polyphagous Shot Hole Borer in South Africa. Presentation to Ethekwini Municipality, 17th July 2018, Durban.

Paap T, de Beer ZW. Polyphagous Shot Hole Borer in South Africa. Presentation to Simbithi Eco Estate, 12th July 2018, Shaka’s Rock. 

Paap T, de Beer ZW, Burgess TI, Wingfield MJ. Sentinel tree research in botanical gardens of South Africa and detection of the invasive polyphagous shot hole borer, a major threat to tree health. 45th Annual Research Symposium on the Management of Biological Invasions in Southern Africa, 4th July 2018, Thohoyandou.

Paap T, Burgess TI, Wingfield MJ. Sentinel trees to detect pest and pathogen invasions: a global project. 29th annual meeting of the Tree Protection Cooperative Programme (TPCP), 16th May 2017, Pretoria.

Paap T. An early warning system for new and emerging threats to global plant health. PSHB Public Information Session, 19th April 2018, Pretoria.

Paap T, de Beer ZW, Migliorini D, Nel WJ, Wingfield MJ. First report of the polyphagous shot hole borer (PSHB) and its fungal symbiont in South Africa. 44th Conference of the South African Association of Botanists (SAAB), 10th January 2018, Pretoria.

Paap T, Burgess TI, Wingfield MJ. Urban trees: Bridgeheads and Sentinels. UNISA Department of Environmental Science Colloquium, People and Green Space, 19th Oct 2017, Roodepoort.

Paap T, Burgess TI, Wingfield MJ. FABI progress report. Curators Week, 5th Oct 2017, Free State National Botanical Gardens, Bloemfontein.

Paap T, Burgess TI, Wingfield MJ. Urban trees: Bridgeheads and Sentinels. Institute of Environment and Recreation Management (IERM) Convention, 12th Sep 2017, Johannesburg.

Paap T. Sentinel Tree Research in South Africa. Murdoch University Plant Pathology Group Seminar, 16th Aug 2017, Perth, Western Australia.

Paap T, Burgess TI, Wingfield MJ. Urban Forests: Sources of invasion for plantations. 28th annual meeting of the Tree Protection Cooperative Programme (TPCP), 17th May 2017, Pretoria.

Paap T, Hulbert J, Burgess TI, Wingfield MJ. Botanical gardens: Sentinel plantings to detect new and emerging Phytophthora risks’ 8th Meeting IUFRO Working Party 7.02.09 Phytophthora in Forests and Natural Ecosystems, 23rd Mar 2017, Sapa, Vietnam.

Paap T. Pathologist on the move. FABI Post Doc Seminar, 20th Feb 2017, Pretoria.

Paap T. Pathogens and insect pests as invasives on trees in urban environments. Non-native species in urban environments workshop hosted by the DST-NRF Centre of Excellence for Invasion Biology (CIB), 8th November 2016, Stellenbosch.

Paap T. Monitoring tree health at sentinel sites: botanic gardens and arboreta, Curators Week, 3rd October 2016, East London.

Background to the project

Currently, there is a rapid surge in the number of alien arthropod plant pests and pathogens in many countries. Unfortunately, many of these pests and pathogens are unknown to science or at least unknown to cause serious damage before they arrive and establish in a novel environment. Improved pest and pathogen surveillance and monitoring methods and early warning systems are therefore required. To this effect, recently there is a move towards sentinel plant research to identify new and emerging pest and pathogen risks before they arrive in novel environments. In 2016, a South African National Biodiversity Institute (SANBI) funded project was initiated under the framework of the International Plant Sentinel Network (IPSN). The project aims to improve surveillance and identification of new and emerging pest and pathogen risks, by monitoring plant health in botanical gardens and arboreta in South Africa. South Africa is privileged to have several botanical gardens and arboreta located across the country. These gardens and arboreta provide a unique opportunity for biosecurity research as they house diverse collections of exotic and native plant species. The project also promotes an increased awareness of plant health issues, and aims to build capacity within the gardens to detect and manage pest and pathogen problems.

This website provides access to resources generated from this project and previous biosecurity related research conducted in botanical gardens and arboreta in South Africa.

The project is funded and supported by:

Important Links:

Contact information:

Dr Felipe Balocchi
Forestry and Agricultural Biotechnology Institute (FABI)
University of Pretoria
Pretoria 0002
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Telephone: +27 (12) 4203939

Pests and pathogens identified from botanical gardens in South Africa 

 

Species

Order: Family

Native range

Collected/isolated from

Botanic garden

1

Ace of spades cycad stem borer, Phacecorynes variegatus

Coleoptera: Curcullionidae

South Africa

Encephalartos cycads

Kirstenbosch NBG

2

African citrus psyllid, Trioza erytreae

Hemiptera: Triozidae

Africa

Cirus spp., Clausena anisata, Zanthoxylum davyi

Durban Botanical Garden, KwaZulu-Natal NBG, Pretoria NBG 

3

Aloe red scale, Separaspis capensis

Hemiptera: Diaspididae

Unknown

Aloe spp.

Kirstenbosch NBG

4

Araucaria scale, Uhleria araucariae

Hemiptera: Eriococcidae

Unknown

Araucaria heterophylla

Arderne Gardens, KwaZulu-Natal NBG

5

Armoured scale insect, Chrysompahlus pinnulifer

Hemiptera: Diaspididae

Unknown

Syzygium guineense

Arderne Gardens

6

Armoured scale insect, Duplachionaspis sp.

Hemiptera: Diaspididae

Unknown

Aloe marlothii, A. arborescens

Pretoria NBG

7

Asian woolly hackberry aphid, Shivaphis celti

Hemiptera: Aphididae

Asia

Celtis africana

Arderne Gardens

8

Aspidiotus capensis

 

Hemiptera: Diaspididae

South Africa

Encephalartos senticosus, E. altenstenii

Pretoria NBG

9

Banded Snout Beetle, Phlyctinus callosus

Coleoptera: Curcullionidae

South Africa 

Different succulent hosts, including aloes

Kirstenbosch NBG

10

Bracket fungus, Ganoderma spp. (mainly G. destructans) 

Polyporales: Ganodermataceae

Unknown

Senegalia nigrescens, Vachellia xanthophloea, Combretum sp., Dracaena sp., Searsia chirindensis

Pretoria NBG

 

Olinia ventosa

Kirstenbosch NBG

Fagus sylvatica

Arderne Gardens

Celtis Africana, Aracaria sp.

KwaZulu-Natal NBG

C. Africana, Combretum erythrophyllum, Dombeya cymosa

Walter Sisulu NBG

11

Cinara tujafilina*

Hemiptera: Ahididae

Asia

Widdringtonia wallichii (formerly W. cederbergensis)

Kirstenbosch NBG

12

Cycad aulacaspis scale, Aulacaspis yatsumatsui 

Hemiptera: Diaspididae

South East Asia

Cycad revoluta and other exotic cycad species

Durban Botanical Garden, Pretoria NBG

13

Cypress aphid, Cinara cupressi*

Hemiptera: Ahididae

North America

Widdringtonia nodiflora

Kirstenbosch NBG

14

Ectopsocus briggsi

Hemiptera: Psyllidae

Unknown

Laurus nobilis

Arderne Gardens

15

Erythrina gall wasp, Quadrasticus erythrinae

Hymenoptera: Eulophidae

East Africa

Erythrina caffra, E. lysistemon

Durban Botanical Garden, KwaZulu-Nalal NBG

16

Euplatypus sp.*

Coleoptera: Curcullionidae

Unknown

Ficus macrophylla

Kirstenbosch NBG

17

Flat mite, Cenopalpus pterinus

Trombidiformes: Tenuipalpidae

Unknown

Fagus sylvatica var purpurea

Arderne Gardens

18

Fluted cushion scale, Icerya purchasi

Hemiptera: Monophlebidae

Australia

Citrus spp.

KwaZulu-Natal NBG

19

Fusarium euwallaceae (Fungal symbiont of Polyphagous Shot Hole Borer (PSHB)*

Hypocreales: Nectriaceae

Asia

Platanus x acerifolia

Kwazulu-Natal NBG

Senegalia galipinii, Acer negundo, Brachychiton discolour, Dombeya rotundifolia, Erythrina lysistemon, Quercus kellogii, Searsia lancea, Liquidambar styraciflua

Pretoria National Zoological Garden

20

Gardenbane Weevil, Ellimenistes laesicollis

Coleoptera: Curcullionidae

Southern Africa

Many hosts

Kirstenbosch NBG

21

Greater aloe snout beetle Brachycerus tauriculus

Coleoptera: Curcullionidae

Southern Africa

Many Aloe spp.

Kirstenbosch NBG

22

Honey fungus, Armillaria mellea, A.gallica 

Agaricales: Physalacriaceae

Northern hemisphere

Fagus sylvatica, Lithocarpus sp., Rhododendron sp.

Arderne Gardens

Brabejum stellatifolium, Olea capensis subsp. Capensis, Senegalia burkei, Vachellia sieberiana var. woodii, Albizia adianthifolia, Apodytes dimidiata, Cassine peragua, Celtis African, Cinnamomum camphora, Ealaedendron croceum, Ficus lutea, Ilex mitis, Indigofera spp., Leucadendron argeteum, Olea capensis, O. woodiana, Protorhus longifolia, Salix mucronate, Schotia afra, Searsia chirindensis, Trema arientalis, Trichelia dregeana, Vepris lanceolate, Virgilia orobodes, Widdringtonia nodiflora 

Kirstenbosch NBG

23

Large cycad stem borer, Phacecorynes sommeri  

Coleoptera: Curcullionidae

South Africa

Encephalartos cycad

Kirstenbosch NBG

24

Latania scale, Hemiberlesia lataniae

Hemiptera: Diaspididae

Unknown

Fagus sylvatica var purpurea

Arderne Gardens

25

Lecanodiaspis sp.

Hemiptera: Lecanodiaspididae

Unknown

Hibiscus sp.

Pretoria NBG

26

Lesser aloe snout beetle, Rhadinomerus illictus

Coloeptera: Curcullionidae

Southern Africa

Most Aloe species 

Harold Porter NBG, Kirstenbosch NBG

27

Mining scale, Howardia biclavis

Hemiptera: Diaspididae

New World tropics or Africa

Fagus sylvatica var purpurea

Arderne Gardens

28

Palm aphid, Cerataphis sp.

Hemiptera: Aphididae

South East Asia

Cococ nucifera

Durban Botanical Garden

29

Phaea sp.

Coloeptera: Ceraymbecidae

Unknown

Erythrina lysistemon

Kirstenbosch NBG

30

Phytophthora amnicola*

Peronosporales: Peronosporaceae

Unknown

Soil mix and water source samples

Stellenbosch University Botanical Garden

31

Phytophthora asparagi*

Peronosporales: Peronosporaceae

Unknown

Garden bed samples

Kirstenbosch NBG

32

Phytophthora capensis

Peronosporales: Peronosporaceae

Unknown

Garden bed samples

Kirstenbosch NBG

33

Phytophthora chlamydospora

Peronosporales: Peronosporaceae

Unknown

Soil mix samples

Kirstenbosch NBG

34

Phytophthora cinnamomi

Peronosporales: Peronosporaceae

Unknown

Garden bed samples, Quercus suber, Leucadendron argenteum  

Harold Porter NBG, Kirstenbosch NBG, Stellenbosch University Botanical Garden

35

Phytophthora lacustris

Peronosporales: Peronosporaceae

Unknown

Water source samples

Stellenbosch University Botanical Garden

36

Phytophthora multivora

Peronosporales: Peronosporaceae

Unknown

Garden bed and soil mix samples, Cupressus sempervirens

City of Cape Town Company’s Garden, Harold Porter NBG, Kirstenbosch NBG, Stellenbosch University Botanical Garden,

37

Phytophthora nicotianae

Peronosporales: Peronosporaceae

Unknown

Roots and rhizosphere soil of dying Encephalartos spp.

Pretoria NBG

38

Phytophthora tropicalis*

Peronosporales: Peronosporaceae

Unknown

Garden bed samples

City of Cape Town Company’s Garden

39

Polyphagous Shot Hole Borer (PSHB), Euwallacea fornicatus*

Coleoptera: Curcullionidae

Asia

Platanus x acerifolia

KwaZulu-Natal NBG

Senegalia galipinii, Acer negundo, Brachychiton discolour, Dombeya rotundifolia, Erythrina lysistemon, Quercus kellogii, Searsia lancea, Liquidambar styraciflua

Pretoria National Zoological Garden

Vachellia sieberiana var. woodii, Cordia caffra, Erythrina lysistemon, E. abysinnica

Walter Sisulu NBG

40

Pulvinaria delottoi

Hemiptera: Coccidae

South Africa

Mesembranthymum sp.

Durban Botanical Garden

41

Pyriform scale, Protopulvinaria pyriformis

Hemiptera: Coccidae

Unknown

Syzygium guineense

Arderne Gardens

42

Sciobius tottus

 

Coleoptera: Curculionidae

Southern Africa

Cilvia spp., Melianthus spp.

Kirstenbosch NBG

43

Seychelles scale, Icerya seychellarum

Hemiptera: Monophlebidae

Seychelles or South Africa

Camellia japonica, Archontophoenix cunninghamiana

Arderne Gardens

44

Sophronica carbonaria

 

Coleoptera: Cerambycidae

Unknown

Aloe succotrina

Kirstenbosch NBG

45

The garden Acraea, Acraea horta

Lepidoptera: Nymphalidae

Southern Africa

Kiggelaria africana

Kirstenbosch NBG

46

The golden mealybug, Nipaecoccus aurilanatus

Hemiptera: Pseudococcidae

Australia

Araucaria sp.

Arderne Gardens, KwaZulu-Natal NBG

47

The leopard magpie moth, Zerenopsis leopardina

Lepidoptera: Geometridae

Southern Africa

A range of native cycads 

KwaZulu-Natal NBG

48

Trichopsocus clarus*

Psocoptera: Trichopsocidae

Unknown

Camellia japonica, Viburnum sp., Zanthoxylum davyi,   

Arderne Gardens

49

Trioza bullatae

 

Hemiptera: Psyllidae

South Africa

Ocotea bullata

Kirstenbosch NBG

 

50

Trioza sp.

 

 

Hemiptera: Triozidae

Unknown

Hellaria lucida

Harold Porter NBG, Kirstenbosch NBG

Curtisia dentate

Harold Porter NBG

Ficus sur

KwaZulu-Natal NBG, Pretoria NBG

51

Wax scales, Ceroplastes sp.

Hemiptera: Coccidae

Unknown

Podocarpus henkelii

Pretoria NBG

52

White powdery scale,  Pseudocribrolecanium andersoni

Hemiptera: Coccidae

Africa

Strelitiz nicolai

Durban Botanical Garden

53

Woolly whitefly,  Aleurothrixus floccosus

Hemiptera: Aleyrodidae

Neotropics

Citrus spp.

Pretoria NBG

* - First confirmed records for South Africa

 NBG – National Botanical Garden  

New Publications

Marais I, Buitendag C, Duong TA, Crampton BG, Theron J, Kidanemarium D, Berger DK. (2024) Double-stranded RNA uptake for the control of the maize pathogen Cercospora zeina. Plant Pathology Online first:1-11. 10.1111/ppa.13909
van Heerden A, Pham NQ, Wingfield BD, Wingfield MJ, Muro Abad JI, Durán A, Wilken PM. (2024) LAMP assay to detect Elsinoë necatrix; an important Eucalyptus shoot and leaf pathogen. Plant Disease 10.1094/PDIS-01-24-0086-RE
Silva GA, Oliveira MES, Rêgo GMS, Wingfield BD, Wingfield MJ, Ferreira MA. (2024) Chrysoporthe brasiliensis sp. nov. pathogenic to Melastomataceae in southeast Brazil. Fungal Biology 10.1016/j.funbio.2024.04.001
Fick A, Swart V, Bombarely A, van den Berg N. (2024) Comparative transcriptional analysis of Persea americana MYB, WRKY and AP2/ERF transcription factors following Phytophthora cinnamomi infection. Molecular Plant Pathology 25(4):e13453. 10.1111/mpp.13453 PDF
Van Lill M, Venter SN, Muema EK, Palmer M., Beukes CW, Chan WY, Steenkamp ET. (2024) SeqCode facilitates naming of South African rhizobia left in limbo. Systematics and Applied Microbiology 47(2-3):126504. 10.1016/j.syapm.2024.126504 PDF