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Harry C Evans

Harry Evans


Principal areas of expertise

  • More than 30 years experience in disease identification and management in tropical agriculture and forestry. Over 130 scientific papers published on plant and insect pathology, including a standard reference book. Currently responsible for initiating and co-ordinating research projects on the use of fungi for the biological control of weeds and plant diseases.


  • Present: Senior pathologist. CABI Bioscience (UK Centre), Ascot, (formerly International Institute of Biological Control, IIBC). Initiation and co-ordination of research projects within the weed pathology group.
  • 1980 - 1984: Forest Pathologist - home based. ODA-sponsored project at Commonwealth Mycological Institute and Honduran Forestry Institute, Honduras.
  • 1977 - 1980: Cocoa Pathologist. ODA-secondment to the Special Amazonian Department, Belém, Brazil.
  • 1973 - 1977: Cocoa Pathologist. ODA-secondment to the Tropical Experimental Station, Pichilingue, Ecuador.
  • 1969 - 1973 : Cocoa Pathologist. ODA-secondment to the Cocoa Research Institute of Ghana.
  • 1966 - 1969: Assistant lecturer/Demonstrator. Biology Dept., Keele University.


  • B.Sc.(Hons), Botany, Queen Mary College, University of London, 1965.
  • M.Sc. Plant Pathology, Exeter University, 1966.
  • Ph.D., Mycology, Keele University, 1969.
  • D.Sc., Applied Mycology, University of London, 1999

Personal details

  • British
  • CABI Bioscience UK Centre (Ascot), Silwood Park, Buckhurst Road, Ascot, Bucks. SL5 7TA. UK.

Principal Publications

  • Evans, H.C. (2000). Evaluating plant pathogens for biological control of weeds: an alternative view of pest risk assessment. Australasian Plant Pathology 29, 1-14.
  • Mack, R.N., Simberloff, D., Lonsdale, W.M., Evans, H.C., Clout, M. & Bazzaz, F.A. (2000). Biotic invasions: causes, epidemiology, global consequences and control. Ecological Applications 10, 689-710.
  • Cannon, P.F. & Evans, H.C. (1999). Biotrophic species of Phyllachoraceae associated with the angiosperm family Erythroxylaceae. Mycological Research 103, 577-590.
  • Evans, H.C., Krauss, K., Rios, R.R., Zecevich, T.A. & Arevalo-Gardini, E. (1998). Cocoa in Peru. Cocoa Growers' Bulletin 51, 7-22.
  • Evans, H.C. (1997). Parthenium hysterophorus: a review of its weed status and the possibility for biological control. Biocontrol News and Information 18, 89-98.
  • Evans, H.C. (1995). Fungi as biocontrol agents of weeds: tropical perspective. Canadian Journal of Botany 73: 58-64.
  • Barreto, R.W. and Evans, H.C. (1995) The mycobiota of the weed Mikania micrantha in southern Brazil with particular reference to fungal pathogens for biological control. Mycological Research 99: 343-352.
  • Evans, H.C. (1994) Spore germination in the entomopathogenic genus Aschersonia. Mycological Research 98: 165-168.
  • Evans, H.C. (1993) Studies on the rust Maravalia cryptostegiae, a potential biological control agent of rubber-wine weed (Cryptostegia grandiflora, Asclepiadaceae) in Australia. I. Life-cycle. Mycopathologia 124: 163-174.
  • Jun, Y., Bridge, P.D. & Evans, H.C. (1992). An integrated approach to the taxonomy of the genus Verticillium. Journal of General Microbiology 137: 1437-1444.
  • Evans, H.C. & Latge, J.P. (1988). An Atlas of Entomopathogenic Fungi. Springer Verlag: Berlin, 192pp.
  • Evans, H.C. (1988), Coevolution of entomogenous fungi and their insect hosts. In: Coevolution of Fungi with Plants and Animals (Eds.: D.L. Hawksworth & K.A. Pirozynski), pp. 149-171. Academic Press: London & New York.
  • Barreto, R.A. & Evans, H.C. (1988). Taxonomy of a fungus introduced into Hawaii for biological control of Ageratina riparia (Eupatorieae: Compositae), with observations on related weed pathogens. Transactions of the British Mycological Society 91: 81-97.
  • Evans, H.C. (1987). Fungal pathogens of some subtropical and tropical weeds and the possibilities for biological control. Biocontrol News and Information 8: 7-30.
  • Evans, H.C. & Prior, C. (1987). Cocoa pod diseases: casual agents and control. Outlook on Agriculture 16: 35-41.
  • Evans, H.C. (1986). A reassessment of Moniliophthora (Monilia) pod rot of cocoa. Cocoa Growers' Bulletin 37: 34-43.
  • Bastos, C.N. & Evans, H.C. (1985). A new pathotype of Crinipellis perniciosa (witches' broom disease) on solanaceous hosts. Plant Pathology 34: 306-312.
  • Evans H.C. & Minter D.W. (1985). Two remarkable new fungi on pine from Central America. Transactions of the British Mycological Society 84: 57-78.
  • Evans, H.C. (1984). The genus Mycosphaerella and its anamorphs Cercosepteria, Dothistroma and Lecanosticta on pines. Mycological Papers 153: 1-102.
  • Evans, H.C. & Samson, R.A. (1984). Cordyceps species and their anamorphs pathogenic on ants (Formicidae) in tropical forest ecosystems. II. The Camponotus (Formicidae) complex. Transactions of the British Mycological Society 82: 127-150.
  • Evans, H.C. & Samson, R.A. (1982). Entomogenous fungi from the Galapagos Islands. Canadian Journal of Botany 60: 2325-2333.
  • Evans, H.C. (1981). Witches' broom disease a case study. Cocoa Growers' Bulletin 32: 5-19.
  • Bastos, C.N., Evans, H.C. & Samson, R.A. (1981). A new hyperparasitic fungus, Cladobotryum amazonense, with potential for the control of fungal pathogens of cocoa. Transactions of the British Mycological Society 77: 273-278.
  • Evans, H.C. (1981). Pod rot of cacao caused by Moniliophthora (Monilia) roreri. Phytopathological Paper No. 24, 44pp.
  • Evans, H.C. (1980). Pleomorphism in Crinipellis perniciosa, the causal agent of witches' broom disease of cocoa. Transactions of the British Mycological Society 74: 515-523.
  • Evans, H.C. & Bastos, C.N. (1980). Basidiospore germination as a means of assessing resistance to Crinipellis perniciosa (witches' broom disease) in cocoa cultivars. Transactions of the British Mycological Society 74: 525-536.
  • Evans, H.C. (1978). Witches' broom disease of cocoa (Crinipellis perniciosa) in Ecuador. I. The fungus. Annals of Applied Biology 89: 185-192.
  • Evans, H.C. , Stalpers, J.A., Samson, R.A. & Benny, G.L. (1978). On the taxonomy of Monilia roreri, an important pathogen of Theobroma cacao in South America. Canadian Journal of Botany 56: 2528-2532.
  • Evans, H.C. Edwards, D.F. & Rodriguez, M. (1977). Research on cocoa diseases in Ecuador: past and present. PANS 23: 63-80.
  • Evans, H.C. & Samson, R.A. (1977). Sporodiniella umbellata, an entomogenous fungus of the Mucorales from cocoa farms in Ecuador. Canadian Journal of Botany: 55: 2981-2984.
  • Evans, H.C. (1974). Natural control of arthropods, with special reference to ants (Formicidae), by fungi in the tropical high forest of Ghana. Journal of Applied Ecology 11: 37-49.
  • Evans, H.C. (1973). Invertebrate vectors of Phytophthora palmivora causing black pod disease of cocoa in Ghana. Annals of Applied Biology 75: 331-345.
  • Evans, H.C. (1971). Transmission of Phytophthora pod rot of cocoa by invertebrates. Nature, London 232: 346-347



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