Chemical ecology is the study of the role that chemicals play mediating interactions between organisms and organisms and their environment, and the consequences of those interactions in ecological and evolutionary time.  It is not an autonomous discipline but rather an approach to ecology, one of viewing ecological interactions through a chemical lens.  Consequently it is highly interdisciplinary, commonly involving behavior, ecology, genomics, physiology, biochemistry, chemistry and neurobiology.  Olfaction is the dominant modality for how most insects perceive and interact with the biotic world and consequently the study of insect chemical ecology has immense potential to inform our understanding of the natural world.  In addition to its heuristic value, this understanding has potential to provide powerful tools for the management of pests. 

Our research interests lie at the interface of behavioral chemical ecology and pest management.  The primary focus of our work is the development of an understanding of the chemical ecology of insect pests of plantation forests and agricultural tree crops in the southern hemisphere.  By using pest species as model systems we are able to simultaneously make discoveries that advance our understanding of the natural world and provide biorational pest management tools to stakeholders.  Specific ongoing projects include the development and optimization of survey and detection tools, characterization of the active space of semiochemical-baited traps and the biotic and abiotic factors that influence it, the impact of chemical ecology on the efficacy of biological control, the chemical ecology of insect pests of plantation and fruit and nut trees and the causes and consequences of variation in insect sex pheromones.

If any of these topics or related ones interest you please contact us.  We are always looking for talented graduate students, postdocs and collaborators.

 

New Publications

Bose T, Hammerbacher A. (2022) The first report of Phytophthora multivesiculata causing black rot of Cymbidium and Ansellia africana from South Africa. Plant Disease 10.1094/PDIS-03-22-0623-PDN
Solís M, Wingfield MJ, Hammerbacher A, Naidoo S. (2022) Comparison of the infection biology of Teratosphaeria destructans and Teratosphaeria epicoccoides on Eucalyptus. Plant Disease 10.1094/PDIS-09-21-1877-RE PDF
Jami F, Marincowitz S, Durán A, Slippers B, Abad JIM, Chen S, Wingfield MJ. (2022) Botryosphaeriaceae diversity on Eucalyptus clones in different climate zones of Indonesia. Forest Pathology :1-14. 10.1111/efp.12737
Makwela MC, Hammerbacher A, Vivas M, Coetzee MPA, Wingfield BD, van Ede G, Bose T. (2022) Uncovering the mycorrhizal community of two Habenaria orchids in South Africa. South African Journal of Botany 10.1016/j.sajb.2022.02.020
Pal E, Almasri H, Paris L, Diogon M, Pioz M, Cousin M, Sene D, Tchamitchian S, Tavares DA, Delbac F, Blot N, Brunet JL, Belzunces L. (2022) Toxicity of the pesticides Imidacloprid, Difenoconazole and Glyphosate alone and in binary and ternary mixtures to winter honey bees: Effects on survival and antioxidative defenses. Toxics 10(3):104. 10.3390/toxics10030104 PDF
Makwela MC, Hammerbacher A, Coetzee MPA, Wingfield BD, van Ede G, Bose T. (2022) Fungal diversity associated with the mycorrhizosphere soil of Brachycorythis conica subsp. transvaalensis, a critically endangered and endemic terrestrial orchid from South Africa. South African Journal of Botany 00:1-8. 10.1016/j.sajb.2022.01.019
Guignard Q, Allison JD, Slippers B. (2022) The evolution of insect visual opsin genes with specific consideration of the influence of ocelli and life history traits. 22:2. 10.1186/s12862-022-01960-8
Dittrich-Schröder G, Garnas JR, Arriagades-Cares D, Ahumada R, Hurley BP, Lawson SA, Slippers B. (2021) Diversity and Introduction History of Glycaspis brimblecombei Reflects a History of Bridgeheads and Distinct Invasions. Frontiers in Forests and Global Change 4:1-11. 10.3389/ffgc.2021.783603
Wondafrash M, Slippers B, Asfaw BA, Makowe IA, Jenya H, Bush S, Kayumba I, Nambazimana A, van der Lingen S, Hurley BP. (2021) Tracing the distribution of natural enemies of non-native invasive eucalypt insect pests in sub- Saharan Africa. Southern Forests: a Journal of Forest Science 83(3):1-10. 10.2989/20702620.2021.1960218
Gevers CR, Slippers B, Germishuizen I, Dittrich-Schröder G, Hurley BP. (2021) The distribution and diversity of Leptocybe invasa (Hymenoptera: Eulophidae) and its gall associates in South Africa. Southern Forests 10.2989/20702620.2021.1944395
Botha G, Fourie A, Hartley J, Van den Berg N, Fourie G. (2021) The impact of Rosellinia necatrix on South African macadamia orchards. SAMAC Journal :54-56. PDF
Ranketse M, Hefer C, Pierneef R, Fourie G, Myburg Z. (2021) South African locally selected macadamia cultivars have a unique genetic identification profile compared to imported cultivars. SAMAC Journal PDF
Huang JB, Hammerbacher A, Gershenzon J, van Dam NM, Sala A, McDowell NG, Chowdhury S, Gleixner G, Trumbore S, Hartmann H. (2021) Storage of carbon reserves in Spruce trees is prioritized over growth in the face of carbon limitation. PNAS 118(33):e2023297118. 10.1073/pnas.2023297118
Bouwer MC, Scheepers L, Slippers B, Rohwer ER, Allison JD. (2021) The Sex Pheromone of the Pine Brown-Tail Moth, Euproctis terminalis (Lepidoptera: Erebidae). Journal of Chemical Ecology 47(8) 10.1007/s10886-021-01301-x
Guignard Q, Spaethe J, Slippers B, Strube-Bloss M, Allison J. (2021) Evidence for UV-green dichromacy in the basal hymenopteran Sirex noctilio (Siricidae). Scientific Reports 11(1):15601. 10.1038/s41598-021-95107-2 PDF
Hurley BP. (2021) The enemy of my enemy is my friend. TIP-MAG (2):4-6. PDF
Chen J, Ullah C, Vassao D, Reichelt M, Gershenzon J, Hammerbacher A. (2021) Sclerotinia sclerotiorum Infection Triggers Changes in Primary and Secondary Metabolism in Arabidopsis thaliana. Phytopathology 111(3):559-569.
Laoué J, Isabel N, Hammerbacher A, Boyle B, Laroche J, Gros-Louis MC, Azaiez A, Bomal C, Lamothe M, Gérardi S, Depardieu C, Bousquet J. (2021) Combining QTL mapping and transcriptomics to decipher the genetic architecture of phenolic compounds metabolism in the conifer white spruce. Frontiers in Plant Science 12:793.
Sayari M, van der Nest MA, Steenkamp ET, Rahimlou S, Hammerbacher A, Wingfield BD. (2021) Characterization of the Ergosterol Biosynthesis Pathway in Ceratocystidaceae. Journal of Fungi 7(3):237.
Bush SJ, Slippers B, Hurley BP. (2020) Eucalypt susceptibility towards the invasive Glycaspis brimblecombei Moore (Hemiptera: Aphalaridae) in South Africa. Southern Forests 82:243-252. 10.2989/20702620.2020.1824556
Makunde PT, Slippers B, Burckhardt D, de Queiroz DL, Lawson SA, Hurley BP. (2020) Current and potential threat of psyllids (Hemiptera: Psylloidea) on eucalypts. Southern Forests 82:233-242. 10.2989/20702620.2020.1813650
Scheepers L, Allison JD, Bouwer MC, Rohwer ER, Slippers B. (2020) Pheromones as management tools for non-Scolytinae Curculionidae: development and implementation considerations. Southern Forests 82(3):202-214. 10.2989/20702620.2020.1858204 PDF
Krivak-Tetley FE, Lantschner MV, Lombardero MJ, Garnas JR, Hurley BP, Villacide JM, Slippers B, Corley J, Liebhold AM, Ayers MP. (2020) Aggressive tree killer or natural thinning agent? Assessing the impacts of a globally important forest insect. Forest Ecology and Management 10.1016/j.foreco.2020.118728
Garnas JR, Vann KE, Hurley BP. (2020) Biotic and abiotic effects on density, body size, sex ratio, and survival in immature stages of the European woodwasp, Sirex noctilio. Ecology and Evolution 10.1002/ece3.6966 PDF
Mufamadi Z, Fourie G, Willis-Boyum A, van den Berg N. (2020) Husk rot disease: causal agents and disease epidemiology. SAMAC Journal PDF
Twiddy D, de Beer ZW, Fourie G. (2020) The PSHB and its potential impact on the South African macadamia Industry. SAMAC Journal PDF
Li GQ, Slippers B, Wingfield MJ, Chen SF. (2020) Variation in Botryosphaeriaceae from Eucalyptus plantations in YunNan Province in southwestern China across a climatic gradient. IMA Fungus 11(22) 10.1186/s43008-020-00043-x
Bush SJ, Slippers B, Dittrich-Schröder G, Hurley BP. (2020) Host specificity tests reveals new host of a global biological control agent Psyllaephagus bliteus (Hymenoptera: Encyrtidae). African Entomology 28:238-248. 10.4001/003.028.0238
Dittrich-Schröder G, Hurley BP, Wingfield MJ, Nahrung HF, Slippers B. (2020) Invasive gall-forming wasps that threaten non-native plantation-grown Eucalyptus: diversity and invasion patterns. Agricultural and Forest Entomology 10.1111/afe.12402
Jactel H, Desprez-Loustau M-L, Battisti A, Brockerhoff E, Santini A, Stenlid J, Björkman C, Branco M, Dehnen-Schmutz K, Douma JC, Drakulic J, Drizou F, Eschen R, Franco JC, Gossner MM, Green S, Kenis M, Klapwijk MJ, Liebhold AM, Orazio C, Prospero S, Robinet C, Schroeder M, Slippers B, Stoev P, Sun J, van den Dool R, Wingfield MJ, Zalucki MP. (2020) Pathologists and entomologists must join forces against forest pest and pathogen invasions. Neobiota 58:107-127. 10.3897/neobiota.58.54389
Slippers B, Visser M, Roux J. (2020) Why it’s so critical to continuously monitor and manage plant diseases. The Conversation https://theconversation.com/why-its-so-critical-to-continuously-monitor-and-manage-plant-diseases-139423#comment_2251101
Mutitu E, TB Hoareau, Hurley BP, Garnas JR, Wingfield MJ, Slippers B. (2020) Reconstructing early routes of invasion of the bronze bug Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae): cities as bridgeheads for global pest invasions. Biological Invasions 10.1007/s10530-020-02258-w
Wondafrash M, Slippers B, Nambazimana A, Kayumba I, Nibouche S, van der Lingen S, Asfaw BA, Jenya H, Mutitu EK, Makowe IA, Chungu D, Kiwuso P, Kulimush E, Razafindrakotomamonjy A, Bosu PP, Sookar P, Hurley BP. (2020) Distribution and genetic diversity of five invasive pests of Eucalyptus in sub-Saharan Africa. Biological Invasions 22:2205–2221. 10.1007/s10530-020-02250-4
Gaudon JM, Lyons DB, Jones GC, Allison JD, Smith SM. (2020) Evaluating methods to detect and monitor North American larval parasitoids of the emerald ash borer (Coleoptera; Buprestidae). The Canadian Entomologist 152(3):389-398. 10.4039/tce.2020.8
Vivas M, Wingfield MJ, Slippers B. (2020) Maternal effects should be considered in the establishment of forestry plantations. Forest Ecology and Management 460:117909. 10.1016/j.foreco.2020.117909
Bouwer MC, MacQuarrie CJK, Aguirre-Gil OJ, Slippers B, Allison JD. (2020) Impact of intercept trap type on plume structure: a potential mechanism for differential performance of intercept trap designs for Monochamus species. . Journal of Pest Science 93:993-1005. 10.1007/s10340-020-01204-y
Faccoli M, Gallego D, Branco M, Brockerhoff EG, Corley J, Coyle DR, Hurley BP, Jactel H, Lakatos F, Lantschner V, Lawson S, Martínez G, Gómez DF, Avtzis D. (2020) A first worldwide multispecies survey of invasive Mediterranean pine bark beetles (Coleoptera: Curculionidae, Scolytinae). Biological Invasions 10.1007/s10530-020-02219-3
Nagel J, Cruywagen EM, Machua J, Wingfield MJ, Slippers B. (2020) Highly transferable microsatellite markers for the genera Lasiodiplodia and Neofusicoccum. Fungal Ecology 44:100903. 10.1016/j.funeco.2019.100903
Haavik LJ, Slippers B, Hurley BP, Dodds KJ, Scarr T, Turgeon JJ, Allison JD. (2020) Influence of the community of associates on Sirex noctilio brood production is contextual. Ecological Entomology 45:456-465. 10.1111/een.12810
Schröder ML, Slippers B, Wingfield MJ, Hurley BP. (2020) Invasion history and management of Eucalyptus snout beetles in the Gonipterus scutellatus species complex. Journal of Pest Science 93:11-25. 10.1007/s10340-019-01156-y PDF
Chen J, Ullah C, Reichelt M, Beran F, Yang ZL, Gershenzon J, Hammerbacher A, Vassao D. (2020) The phytopathogenic fungus Sclerotinia sclerotiorum detoxifies plant glucosinolate hydrolysis products via an isothiocyanate hydrolase. Nature Communications 11:1-12.
Hammerbacher A, Wright LP, Gershenzon J. 2020. Spruce phenolics: biosynthesis and ecological functions. In: The Spruce Genome. Springer, NY, pp 193-214.
Huang J, Seidel R, Gershenzon J, Kandasamy D, Meddens AJH, Chonggang X, Goodsman DW, Adams HD, Raffa KF, Hammerbacher A, Towbridge AM, Kautz M, Hartmann H. (2020) Tree defence and bark beetles in a drying world: carbon partitioning, functioning and modelling. New Phytologist 225:25-36.
Nemesio-Gorriz M, Menezes RC, Paetz C, Hammerbacher A, Steenackers M, Schamp K, Douglas GC. (2020) Metabolomics in Fraxinus excelsior; identification and validation of biochemical markers for tolerance to ash dieback. Journal of Experimental Botany 71(19):6074-6083. PDF
Measey J, Robinson TB, Kruger N, Zengeya TA, Hurley BP. 2020. South Africa as a donor of alien animals. In: Biological Invasions in South Africa. van Wilgen BW, Measey J, Richardson DM, Wilson JR, Zengeya TA. (eds). Springer, pp 787-830. PDF
Hurley BP, Fitza KNE, Wingfield MJ, Slippers B. (2019) Sequence data reflect the introduction pathways of the Sirex woodwasp parasitoid, Ibalia leucospoides (Ibaliidae, Hymenoptera). Agricultural and Forest Entomology 10.1111/afe.12367
Allison JD, Slippers B, Bouwer M, Hurley BP. (2019) Simulated leks increase the capture of female Sirex noctilio in the absence of host volatiles. International Journal of Pest Management :1-7. 10.1080/09670874.2019.1695074 PDF
Allison JD, Bernard Slippers, Marc Bouwer, Hurley BP. (2019) Simulated leks increase the capture of female Sirex noctilio in the absence of host volatiles. International Journal of Pest Management 10.1080/09670874.2019.1695074
Hirsch H, Wingfield MJ, van Wilgen B, Ruwanza S, Klein H, Keet JH, Jones W, Hurley BP, Harding G, Geldenhuys CJ, Geerts S, Cheek M, Canavan S, Allsopp MH, Richardson DM. (2019) Eucalyptus camaldulensis in South Africa - past, present, future. Transactions of the Royal Society of South Africa 10.1080/0035919X.2019.1669732
Katumanyane A, Malan AP, Tiedt LR, Hurley BP. (2019) Steinernema bertusi n. sp. (Rhabditida: Steinernematidae), a new entomopathogenic nematode from South Africa. Nematology 10.1163/15685411-00003309