FABI News

FABI Events

FABI in a nutshell

Research Features

Videos

The impact of a tiny beetle and its deadly fungus on South Africa’s forests (Youtube 36 min) by Prof. Wilhelm de Beer, presented at the National Science and Technology Forum (NSTF) for Plant Health in South Africa on 10 June 2021.

Ecological and economic impact of the polyphagous shot hole borer (YouTube, 5 min; 2022) by Stellenbosch University. Click here to view.

International Year of Plant Health: The Polyphagous Shothole Borer’s effect on South Africa's trees (YouTube video 2.18min; 2020) by the University of Pretoria. Click here to view.

FABI Research Features

The potential economic impact of the polyphagous shot hole borer invasion in South Africa

A doctoral study in FABI confirms for the first time the presence of Xylosandrus crassiusculus, a polyphagous ambrosia beetle and its fungal symbiont, Ambroseilla roeperi, in three provinces in South Africa

Non-FABI Publications

Bierman A., F. Roets, J.S. Terblanche (2022) Population structure of the invasive ambrosia beetle, Euwallacea fornicatus, indicates multiple introductions into South Africa. Biological Invasions. 10.1007/s10530-022-02801-x.

de Jager M., F. Roets (2022) Pathogenicity of Fusarium euwallaceae towards apple (Malus domestica) and grapevine (Vitis vinifera). Australasian Plant Disease Notes 17. 10.1007/s13314-022-00456-0.

de Jager M., F. Roets (2022) Rapid and cost-effective detection of Fusarium euwallaceae from woody tissues. Plant Pathology. 10.1111/ppa.13600.

FABI News

Collection of Ambrosia beetle infested material in Durban

14th Online meeting of the Bark Beetle Mycobiome Network

SANBI-funded Sentinel Plant Project establishes a PSHB monitoring system at the KZN National Botanical Garden

PSHB Network meets

University of Pretoria protects trees against PSHB infestation

Scouting for native natural enemies of PSHB

SANBI Sentinel Plant Project hosts a training workshop for DUT horticulture students

The PSHB takes FABI researchers to Somerset West

Polyphagous Shot Hole Borer online resource

Inspection of invasive disease and pest problems in SANBI's Cape gardens

Prof. Wilhelm de Beer receives the SAIF Distinguished Forestry Award

A webinar on Plant Health in Botanical Gardens amid the COVID-19 pandemic

FABIans in the news: Two articles in Wood Southern Africa & Timber Times highlight the work done by the PSHB Research Network

Getting a PSHB research project done before the lockdown

PSHB is spreading in the Western Cape

Monitoring plant health in botanic gardens and arboreta across South Africa

PSHB survey in Northern Cape Pecan orchards

Shothole Borer meetings in the Cape Peninsula

PSHB fungus tested for pathogenicity on commercial forest trees

Shot Hole borer projects launched in forests of the Southern Cape

Shot Hole Borer invasion places FABI in the spotlight

FABI research work features on Carte Blanche

Tree health experts inspect PSHB infestation in Johannesburg suburbs

FABI Team surveys Johannesburg gardens for PSHB infestations

The impact of the Polyphagous Shothole Borer in South Africa explained in a public seminar at FABI

Ambrosia Beetle Working Group formed at FABI 

The PSHB is a 2mm long ambrosia beetle native to Southeast Asia that has a symbiotic relationship with three species of fungi. These include the tree pathogen, Fusarium euwallaceae. This fungus provides a food source for the beetle and its larvae, but in susceptible trees, it kills the vascular tissue, causing branch dieback and tree death. 

In its native environment in Southeast Asia, it seems as if the beetle and fungus do not cause serious damage because tree species have evolved with the beetle-fungus complex and have resistance towards them, and because there are most likely a suite of natural enemies of the beetle. However, the beetle and fungus were somehow introduced into Israel and California in the early 2000s where they caused serious damage on several ornamental trees as well as avocado trees.  In South Africa the impact of the beetle to date is most visible on ornamental trees.

Identification and species name of the beetle

Until December 2018 the PSHB was known as Euwallacea nr. fornicatus. However, Gomez et al. (2018) showed with DNA sequences that 'Euwallacea fornicatus' is actually a species complex including four closely related, but distinct species. These four species of Shot Hole Borer are very similar in shape, and can only be distinguished by specialists under a microscope or with DNA sequences. The four species carry different fungal species, have different host ranges, and different geographical distributions (Gomez et al. 2018). Although they suggested the name Euwallacea whitfordiodendrus should be used for the PSHB, this was an error that was corrected in a subsequent paper by Smith et al. (2019). The correct names of four Shot Hole Borer species in the E. fornicatus complex are:

1. Tea Shot Hole Borer A [TSHB-a = Euwallacea perbrevis (Schedl 1951)]

Distribution: Asia (American Samoa, China, Indonesia, Papua New Guinea, Samoa, Sri Lanka, Taiwan, Thailand), Australia, and introduced in the USA (Florida and Hawaii)

2. Tea Shot Hole Borer B [TSHB-b = Euwallacea fornicatior (Eggers 1923)]

Distribution: Asia (Malaysia, Papua New Guinea, Singapore, Sri Lanka)

3. Polyphagous Shot Hole Borer [PSHB = Euwallacea fornicatus (Eichhoff 1868), previously referred to as Euwallacea nr. fornicatus and Euwallacea whitfordiodendrus (Schedl 1942)] 

Distribution: Asia (China, Hong Kong, Japan, Taiwan, Thailand, and Vietnam) and introduced in USA (California), Israel, South Africa, and Western Australia

4. Kuroshio Shot Hole Borer [KSHB = Euwallacea kuroshio Gomez and Hulcr 2018]

Distribution: Asia (Indonesia, Japan, and Taiwan) and introduced in Mexico and USA (California)

To date, only the PSHB has been found in South Africa. However, both the PSHB and KSHB have invaded California, while TSHB-a has invaded Florida. These species carry similar fungi, have similar life styles and similar effects on trees. With our borders being open for trade to Southeast Asia, the risk that one of the other species can be introduced is very high. Co-occurring species increase the chances for interbreeding which will enhance the adaptability of the beetles to new hosts and new environments, posing a greater threat. From a management perspective, they are dealt with in the same ways. In California they have thus started referring to the PSHB and KSHB jointly with the single term Invasive Shot Hole Borers (ISHB). It is recommended that for management and legislative purposes we also adopt the term ISHB in South Africa.

The Polyphagous Shot Hole Borer is an ambrosia beetle native to Southeast Asia. The beetle has a symbiotic relationship with the fungus Fusarium euwallaceae, which causes branch die-back and can kill susceptible trees. In 2017 the presence of this pest was confirmed in South Africa by the FABI team, and it has since been found in all provinces except Limpopo. This makes the PSHB invasion in South Africa the largest geographical outbreak of this beetle in the world. It is affecting trees in all sectors: the agricultural and commercial forestry sector, urban trees (public spaces, streets, gardens), as well as native trees in natural forests.

At present researchers at FABI, in collaboration with colleagues from several other Universities, are coordinating monitoring efforts and leading research on the PSHB and its fungus in South Africa. The purpose of this webpage is to provide:

1. Background information on the PSHB and its management to the general public and all stake holders,
2. Updated information on its distribution and its host trees in South Africa,
3. Feedback on ongoing research and monitoring efforts by the PSHB Research Network, and
4. A platform for the public to make us aware of possible new host trees of PSHB and localities where it occurs.

 

 


 

New Publications

Nethononda PD, Hurley BP, Slippers B, Makhura MN. (2026) Smallholder farmers’ knowledge, perception and management of Spodoptera frugiperda (Lepidoptera: Noctuidae) on Zea mays at irrigation schemes in Limpopo province, South Africa. Crop Protection :107457. 10.1016/j.cropro.2025.107457
Botha I, De Canha MN, Oberlander K, Botes J, Lall N, Berger DK. (2025) DNA barcoding and anti-tyrosinase activities of three species-representative populations of the genus Greyia Hook & Harv. South African Journal of Botany 189:55-67. 10.1016/j.sajb.2025.11.035
Nel WJ, Barnes I, Jali S, Impson F, Oberprieler RG, Hurley BP. (2025) First report of Melanterius inconspicuus (Coleoptera: Curculionidae: Cleogonini) from KwaZulu-Natal, South Africa, with observations of its development in black wattle. Southern Forests 10.2989/20702620.2025.2537823 PDF
Regasa K, Beze W, Anjulo A, Wondafrash M, Hurley BP, Lawson SA, Healey M, Germishuizen I. (2025) Evaluating fungicides for the management of rust (Uromycladium acaciae) on black wattle nursery seedlings in Awi zone, Amhara regional state, Ethiopia. International Journal of Forestry Research 10.1155/ijfr/5547814
Ramantswana TM, Malatji DP, Pierneef RE, Soma P, Van Der Nest MA, Muchadeyi FC. (2025) Differential gene expression analysis of Dohne Merino sheep naturally infected with Haemonchus contortus. Scientific Reports 15:41843. 10.1038/s41598-025-25782-y
Nadasen T, Buitendag C, Visser R, Welgemoed T, Hein I, Berger DK. (2025) A latent invader: transcriptomics reveals Cercospora zeina’s stealth infection strategy of maize and immune-activating effectors. Frontiers in Plant Science 16:1-23. 10.3389/fpls.2025.1703682
Wilson AM, Wingfield MJ, Duong TA, Wingfield BD. (2025) Thermotolerance and post-fire growth in Rhizina undulata is associated with the expansion of heat stress-related protein families. BMC Genomics 26:1041. 10.1186/s12864-025-11902-5
Fuchs T, Vismer HF, Visagie CM, Wingfield BD, Wingfield MJ. (2025) Low genotypic diversity and first reports of clinical Sporothrix from retrospective samples in South Africa. Medical Mycology 10.1093/mmy/myaf102
Yilmaz N, Verheecke-Vaessen C. (2025) Mycotoxins: An ongoing challenge to food safety and security. PLOS Pathogens 21(11) 10.1371/journal.ppat.1013672
Coelho MA, David-Palma M, Kachalkin AV, Kolařík M, Turchetti B, Sampaio JP, Wingfield MJ, Fisher MC, Yurkov AM, Heitman J. (2025) Genomic and phenotypic insights into the expanding phylogenetic landscape of the Cryptococcus genus. PLOS Genetics 21(11) 10.1371/journal.pgen.1011945 PDF
Ramatsitsi NM, Manyevere A, Motloba T. (2025) Myco-ecological warfare with Meloidogyne species. Archives of Agronomy and Soil Science 71(1):1-15. 10.1080/03650340.2025.2579892 PDF
Shaw PL, Slippers B, Wingfield BD, Laurent B, Penaud B, Wingfield MJ, Crous PW, Bihon W, Duong TA. (2025) Chromosome-level genome assemblies for the latent pine pathogen, Diplodia sapinea, reveal two accessory chromosomes with distinct genomic features and evolutionary dynamics. G3 Genes|Genomes|Genetics :jkaf239. 10.1093/g3journal/jkaf239 PDF
Coelho MA, David-Palma M, Marincowitz S, Aylward J, Pham NQ, Yurkov AM, Wingfield BD, Wingfield MJ, Sheng S, Heitman J. (2025) The complex evolution and genomic dynamics of mating-type loci in Cryptococcus and Kwoniella. PLoS Biology 23:e3003417. 10.1371/journal.pbio.3003417
Visagie CM, Houbraken J, Overy DP, Sklenář F, Bensch K, Frisvad JC, Mack J, Perrone G, Samson RA, van Vuuren NI, Yilmaz N, Hubka V. (2025) From chaos to tranquillity: a modern approach to the identification, nomenclature and phylogeny of Aspergillus, Penicillium and other Eurotiales, including an updated accepted species list. Studies in Mycology 112:117–260. 10.3114/sim.2025.112.04
Vincent C, Singh A, Michalczyk GZ, Lane SL, Kaur R, Gill AR, Dziedzic N, De Silva K, Cho A, Cardoso AA, Alade DO, Tejera-Nieves M, Sharkey TD, Schmiege SC, Pelech E, Locke AM, Leisner CP, Teshome DT. (2025) Importance of measuring and reporting environmental conditions across plant science subdisciplines. Plant Physiology 199(2) 10.1093/plphys/kiaf405
Maake MM, Beukes CW, van der Nest MA, Avontuur JR, Muema EK, Stepkowski T, Venter SN, Steenkamp ET. (2025) Argyrolobium legumes from an African centre of endemism associate with novel Bradyrhizobium species harbouring unique sets of symbiosis genes. Molecular Phylogenetics and Evolution 214:108471. 10.1016/j.ympev.2025.108471
Joubert M, van den Berg N, Theron J, Swart V. (2025) Small RNAs derived from avocado sunblotch viroid and their association with bleaching symptoms: implications for pathogenesis in avocado sunblotch disease. Archives of Virology 170(10):205. 10.1007/s00705-025-06360-z PDF
Mavima L, Steenkamp ET, Beukes CW, Palmer M, De Meyer SE, James EK, Venter SN, Coetzee MPA. (2025) Estimated timeline for the evolution of symbiotic nitrogen fixing Paraburkholderia. Molecular Phylogenetics and Evolution 213:108447. 10.1016/j.ympev.2025.108447
Pham NQ, Liu FF, Duong TA, Wingfield BD, Chen SF, Wingfield MJ. (2025) Genetic diversity of Calonectria reteaudii isolates from infected Eucalyptus leaves and associated soils indicates a phyllosphere origin of the pathogen. Forest Pathology 55:e70037. 10.1111/efp.70037
Schröder ML, Hurley BP, Wingfield MJ, Slippers B, Garnas JR. (2025) Thermal limitations to the biological control of Gonipterus sp. n. 2 (Coleoptera: Curculionidae) in South African Eucalyptus plantations. Agricultural and Forest Entomology 10.1111/afe.70002
Lynn KMT, Wingfield MJ, Tarigan M, Durán A, Santos SA, Nel WJ, Barnes I. (2025) Investigating bark, ambrosia and nitidulid beetle (Coleoptera: Scolytinae and Nitidulidae) communities and their potential role in the movement of Ceratocystis manginecans in commercial forestry plantations in Riau, Indonesia. Agricultural and Forest Entomology 10.1111/afe.12698
Solís M, Hammerbacher A, Wingfield MJ, Naidoo S. (2025) Transcriptional responses of Eucalyptus to infection by an aggressive leaf blight pathogen reveal the role of host secondary metabolites during pathogen germination. Plant Molecular Biology 115 10.1007/s11103-025-01625-2
Coertze S, Coetzee B, Basson E, de Villiers D, Makhura T, Moster D, Slippers B, Rose LJ, Visagie CM, Read D. (2025) First Report of Clavibacter nebraskensis Causing Goss’s Bacterial Leaf Blight on Maize (Zea mays) in South Africa. Plant Disease 109:1580. 10.1094/PDIS-01-25-0164-PDN
Overy DP, Frisvad JC, Witte TE, Hicks CL, Hermans A, Sproule A, Louis-Seize G, Seifert KA, Yilmaz N, Price J, van Vuuren NI, Visagie CM. (2025) Chemodiversity of Penicillium isolated from alpine and arctic environments, including ten new species. Studies in Mycology 112:75–116. 10.3114/sim.2025.112.03
Mailula DM, Wingfiled BD, Van Der Nest MA, Hammerbacher A. (2025) Production of fusel alcohols and fusel acetates by pathogenic fungi in the Ceratocystidaceae. Fungal Ecology 76:101427. 10.1016/j.funeco.2025.101427
Seale T, Brözel VS, Potgieter SC, Rupp O, Blom J, Steenkamp ET, Venter SN. (2025) Diversity of Environmental Escherichia coli in Subtropical Freshwater Systems of South Africa. Current Microbiology 82:414. 10.1007/s00284-025-04402-y
Harris MA, Kemler M, Slippers B, Hassel N, Tsamba J, Arthan W, Kellogg EA, AuBuchon-Elder T, Vorontsova MS, Archibald S, Hempson GP, Lehmann CER, Besnard G, Bergerow D, Brachmann A, Solofondranohatra CL, Greve M. (2025) Productivity drives leaf mycobiome diversity patterns at global and continetal scales. Global Ecology and Biogeography 34:e70094. 10.1111/geb.70094
Gao M, Yan Z, Liu Z, Jiang Y, Liu T, Miao X, Dai M, Bose T, Chang R. (2025) A novel Arthrobotrys species: Taxonomic characterization, nematicidal activity, and multi-omics insights into nematode predation. Biological Control 208:105853. 10.1016/j.biocontrol.2025.105853
Esterhuizen HJ, Slippers B, Bosman AS, Roux J, Jones W, Bose T, Hammerbacher A. (2025) Early detection of Phytophthora root rot in Eucalyptus using hyperspectral reflectance and machine learning. Computers and Electronics in Agriculture 237:110761. 10.1016/j.compag.2025.110761
Pham NQ, Wingfield BD, Marincowitz S, Brawner JT, Hulcr J, Wingfield MJ. (2025) Cryphonectria canker on Eucalyptus in Florida reconsidered. Forest Pathology 55:e70031. 10.1111/efp.70031
Crous PW, Catcheside DEA, Catcheside PS, Alfenas AC, Alfenas RF, Barreto RW, Lebel T, Balashov S, Broadbridge J, Jurjević Å, De la Peña-Lastra S, Hoffmann R, Mateos A, Riebesehl J, Shivas RG, Soliz Santander FF, Tan YP, Altés A, Bandini D, Carriconde F, Cazabonne J, Czachura P, Gryta H, Eyssartier G, Larsson E, Pereira OL, Rigueiro-Rodríguez A, Wingfield MJ, Ahmad W, Bibi S, Denman S, Esteve-Raventós F, Hussain S, Illescas T, Luangsa-ard JJ, Möller L, Mombert A, Noisripoom W, Olariaga I, Pancorbo F, Paz A, PiÄ…tek M, Polman-Short C, Suárez E, Afshan NS, Ali H, Arzanlou M, Ayer F, Barratt J, Bellanger J, Bidaud A, Bishop-Hurley SL, Bohm M, Bose T, Campo E, Chau NB, Çolak ÃF, Cordeiro TRL, Cruz MO, Custódio FA, Couceiro A, Darmostuk V, Dearnaley JDW, De Azevedo Santiago ALCM, De Freitas LWS, Yáñez-Morales MDJ, Domnauer C, Dentinger B, Dhileepan K, De Souza JT, Dovana F, Eberhardt U, Eisvand P, Erhard A, Fachada V, García-Martín A, Groenewald M, Hammerbacher A, Harms K, Haroon S, Haqnawaz M, Henriques S, Hernández AJ, Jacobus LM, Jaen-Contreras D, Jangsantear P, Kaygusuz O, Knoppersen R, Kumar TKA, Lynch MJ, Mahiques R, Maraia GL, Marbach PAS, Mehrabi-Koushki M, Miller PR, Mongkolsamrit S, Moreau P, Oberlies NH, Oliveira JA, Orlovich D, Pérez-Méndez AS, Pinto A, Raja HA, Ramírez GH, Raphael B, Rodrigues A, Rodrigues H, Ramos DO, Safi A, Sarwar S, Saar I, Sánchez RM, Santana JS, Scrace J, Sales LS, Silva LNP, Stryjak-Bogacka M, Tacconi A, Thanh VN, Thomas A, Thuy NT, Toome M, Valdez-Carrazco JM, Van Vuuren NI, Vasey J, Vauras J, Vila-Viçosa C, Villarreal M, Visagie CM, Vizzini A, Whiteside EJ, Groenewald JZ. (2025) Fungal Planet description sheets: 1781–1866. Persoonia 54:327–587. 10.3114/persoonia.2025.54.10
Nzuza P, Schröder ML, Heim RJ, Daniels L, Slippers B, Hurley BP, Germishuizen I, Sivparsad B, Roux J, Maes WH. (2025) Assessing Gonipterus defoliation levels using multispectral unmanned aerial vehicle (UAV) data in Eucalyptus plantations. Ecological Informatics 90:103301. 10.1016/j.ecoinf.2025.103301
Kunene S, Mmushi TJ, Steenkamp E, Motaung T. (2025) Pinus-derived membrane vesicles disrupt pathogenic metabolism in fungi. plant biology 10.1111/plb.70069 PDF
Theron CA, Wingfield MJ, Ahumada R, Carnegie AJ, Fraser S, Rodas C, Barnes I. (2025) Diversity and distribution of Lophodermium species on non-native Pinus species in the southern hemisphere. Mycological Progress 24(44) 10.1007/s11557-025-02056-5
Msweli D, Geerts S, Nndanduleni M, Paap T. (2025) Evaluation of phosphite to protect a South African Proteaceae from Phytophthora root rot. Journal of Plant Pathology 10.1007/s42161-025-01945-8 PDF
Dewing C, Yilmaz N, Steenkamp ET, Wingfield BD, Visagie CM. (2025) Capturing the fungal diversity hidden in Eastern Cape dairy pastures. Mycological Progress 24(1):38. 10.1007/s11557-025-02059-2
Nel WJ, Duong TA, Fell S, Herron DA, Paap T, Wingfield MJ, de Beer ZW, Hulcr J, Johnson AJ. (2025) A checklist of South African bark and ambrosia beetles (Coleoptera: Curculionidae: Scolytinae, Platypodinae). Zootaxa 5648(1):1-101. 10.11646/zootaxa.5648.1.1
Dewing C, Yilmaz N, Steenkamp ET, Wingfield BD, Visagie CM. (2025) Capturing the fungal diversity hidden in Eastern Cape dairy pastures. Mycological Progress 24:38. 10.1007/s11557-025-02059-2 PDF
Chang R, Yan Z, Jiang J, Wang Y, Si H, Bose T, Miao C. (2025) Four novel endolichenic fungi from Usnea spp. (Lecanorales, Parmeliaceae) in Yunnan and Guizhou, China: Taxonomic description and preliminary assessment of bioactive potentials. MycoKeys 118:55–80. 10.3897/mycokeys.118.155248
Lötter A, Bruna T, Duong TA, Barry K, Lipzen A, Daum C, Yoshinaga Y, Grimwood J, Jenkins JW, Talag J, Borevitz J, Lovell JT, Schmutz J, Wegrzyn JL, Myburg AA. (2025) A haplotype-resolved reference genome for Eucalyptus grandis. G3 Genes|Genomes|Genetics 10.1093/g3journal/jkaf112
Wingfield MJ, Pham NQ, Marincowitz S, Wingfield BD. (2025) Cryphonectriaceae: Biodiverse and threatening tree pathogens in the tropics and southern hemisphere. Annual Review of Phytopathology 63 10.1146/annurev-phyto-121823-030316
Queffelec J, Allison JD, Slippers B, Greeff JM. (2025) Determinants of mating success in a lek-mating species. Agricultural and Forest Entomology :1-10. 10.1111/afe.12692
Magagula P, Swart V, Fourie A, Vermeulen A, Nelson JH, van Rooyen Z, van den Berg N. (2025) Avocado rhizosphere community profiling: white root rot and its impact on microbial composition. Frontiers in Microbiology 16 10.3389/fmicb.2025.1583797
Marincowitz S, Pham NQ, Wingfield BD, Wingfield MJ. (2025) Microfungi associated with dying quiver trees (Aloidendron dichotomum) in South Africa. Fungal Systematics and Evolution 16:71–80. 10.3114/fuse.2025.16.5 PDF
Pham NQ, Marincowitz S, Crous PW, Wingfield MJ. (2025) Diversity of soil-borne Gliocladiopsis from Indonesia, Malaysia and Vietnam. Fungal Systematics and Evolution 16:81–92. 10.3114/fuse.2025.16.6 PDF
Tanney JB, Kemler M, Vivas M, Wingfield MJ, Slippers B. (2025) Silent invaders: The hidden threat of asymptomatic phytobiomes to forest biosecurity. New Phytologist 10.1111/nph.70209
Fick A, Swart V, Van den Berg N. (2025) In silico prediction method for plant Nucleotide-binding leucine-rich repeat- and pathogen effector interactions. The Plant Journal 122:e70169. 10.1111/tpj.70169
Ramakuwela T, Motloba T. (2025) Beneficial nematodes: A natural solution for pest control and soil health. Farmer's Weekly 25014 10.10520/ejc-farmweek_week_v2025_n25014_a12
Bose T, Wingfield MJ, Brachmann A, Witfeld F, Begerow D, Kemler M, Dovey S, Roux J, Slippers B, Vivas M, Hammerbacher A. (2025) Removal of organic biomass in Eucalyptus plantations has a greater impact on fungal than on bacterial networks. Forest Ecology and Management 586:122734. 10.1016/j.foreco.2025.122734
Woodward S, Amin H, Mártin-Gárcia J, Solla A, Diaz-Vazquez R, Romeralo C, Alves A, Pinto G, Herron D, Fraser S, Zas R, Doğmuş-Lehtijärvi HT, Bonello P, Wingfield MJ, Witzell J, Diez JJ. (2025) Host-pathogen interactions in the Pine-Fusarium circinatum pathosystem and the potential for resistance deployment in the field. Forest Pathology 55(2):e70020. 10.1111/efp.70020