Roberts, S.J., Brough, J. and Hunter, P.J. (2006) Modelling the spread of Xanthomonas campestris pv. campestris in module-raised Brassica transplants. Plant Pathology (in press) (Refereed paper)

Vicente, J.G., Everett, B. and Roberts, S.J. (2006) Identification of isolates that cause a leaf spot disease of brassicas as Xanthomonas campestris pv. raphani and pathogenic and genetic comparison with related pathovars. Phytopathology 96, 735-745. (Refereed paper).

Roberts, S. J. (2006) Seed treatments for organic vegetables. In The 2006 Vegetable Yearbook & Buyer's Guide ed. Lynch, M. pp. 35-37. ACT Publishing. (Popular article)

Roberts, S.J. (2006) Report on FV 277 (Interaction of leaf wax and downy mildew in onions). HDC News 121 [March 2006], pp 35-36. East Malling, Horticultural Development Council. (Popular Article)

Roberts, S.J. and Koenraadt, H. (2005) Detection of Xanthomonas campestris pv. campestris (Black rot) in Brassica spp. In: International Rules for Seed Testing: Annexe to Chapter 7 Seed health Methods, pp. 1-15. Bassersdorf, Switzerland: ISTA. (Edited chapter).

Koenraadt, H., van Bilsen, J.G.P.M. and Roberts, S.J. (2005) Comparative test for the detection of Xanthomonas campestris pv. campestris in Brassica seeds. Seed Science and Technology 32, 825-835. (Refereed paper).

Noble, R. and Roberts, S.J. (2004) Eradication of plant pathogens and nematodes during composting: a review. Plant Pathology 53, 548-568. (Refereed paper).

Noble, R., Jones, P.W., Coventry, E., Roberts, S.J., Martin, M. and Alabouvette, C. (2004) Investigation of the Effect of the Composting Process on Particular Plant, Animal and Human Pathogens known to be of Concern for High Quality End-Uses. 40 pp. Banbury, UK.: Waste & Resources Action Programme. (Report).

Roberts, S.J. (2004) Managing Xanthomonas in Brassicas. In: ADAS Horticulture - Vegetable Centre Meeting, Whaplode Manor Hotel, 17 February 2004, (Oral presentation).

Roberts, S.J., Brough, J., Everett, B. and Redstone, S. (2004) Extraction methods for Xanthomonas campestris pv. campestris from brassica seed. Seed Science and Technology 32, 439-453. (Refereed paper).

Vicente, J.G., Alves, J.P., Russell, K. and Roberts, S.J. (2004) Identification and discrimination of Pseudomonas syringae isolates from wild cherry in England. European Journal of Plant Pathology 110, 337-351. (Refereed paper).

Butcher, D., Jackson, R.W., Roberts, S.J., Vivian, A. and Arnold, D.L. (2003) Curing native plasmids in Pseudomonas syringae pathovar pisi identifies pea pathogenicity determinants. In: Society for General Microbiology, 152nd meeting, University of Edinburgh, 7-11 April 2003, (Poster abstract).

Noble, R. and Roberts, S.J. (2003) A review of the literature on eradication of plant pathogens and nematodes during composting, disease suppression and detection of plant pathogens in compost. 41 pp. Banbury, UK: Waste & Resources Action Programme. (Report).

Roberts, S.J. (2003) Statistics in seed health testing. In: ISTA-PDC Seed Health Testing Workshop, Christchurch, New Zealand, Feb 10-13, 2003, (Oral presentation).

Roberts, S.J. (2003) Tracking bacterial infection using lux marked Xanthomonas strains. HRI Annual Report 2002-03 (Popular article).

Roberts, S.J. and Koenraadt, H. (2003) Revised method for detection of Xanthomonas campestris pv. campestris in Brassica seed. ISTA Method Validation Reports 1, 1-7. (Refereed paper).

Roberts, S.J. (2003) Detection of Xanthomonas campestris pv. campestris in brassica seed. In: ISTA-PDC Seed Health Testing Workshop, Christchurch, New Zealand, Feb 10-13, 2003, (Oral presentation).

Roberts, S.J., Bulk, R.W.v.d., Langerak, C.J., Sheppard, J.W. and Taylor, J.D. (2003) Using reference materials in seed health method validation and proficiency testing. In: 8th International Congress of Plant Pathology, Christchurch, New Zealand, February 2-7, 2003., (Abstract).

Sheppard, J.W., Cockerell, V. and Roberts, S.J. (2003) Blotter method for the detection of Alternaria radicina on Daucus carota (carrot). In: International Rules for Seed Testing. Annexe to Chapter 7: Seed Health Testing Methods, pp. 1-6. Bassersdorf, Switzerland: ISTA. (Edited chapter).

Sheppard, J.W., Cockerell, V. and Roberts, S.J. (2003) Blotter method for the detection of Alternaria dauci on Daucus carota (Carrot). In: International Rules for Seed Testing. Annexe to Chapter 7: Seed Health Testing Methods, pp. 1-6. Bassersdorf, Switzerland: ISTA. (Edited chapter).

van Bilsen, J.G.P.M., Cockerell, V. and Roberts, S.J. (2003) Malt agar method for the detection of Alternaria dauci on Daucus carota (Carrot). In: International Rules for Seed Testing. Annexe to Chapter 7: Seed Health Testing Methods, pp. 1-6. Bassersdorf, Switzerland: ISTA. (Edited chapter).

van Bilsen, J.G.P.M., Cockerell, V. and Roberts, S.J. (2003) Malt agar method for the detection of Alternaria radicina on Daucus carota (Carrot). In: International Rules for Seed Testing. Annexe to Chapter 7: Seed Health Testing Methods, pp. 1-6. Bassersdorf, Switzerland: ISTA. (Edited chapter).

Vicente, J.G. and Roberts, S.J. (2003) Screening wild cherry micropropagated plantlets for resistance to bacterial canker. In: Iacobellis, N.S., (Ed.) Developments in Plant Pathology: Pseudomonas syringae pathovars and related pathogens, Dordrecht: Klewer Academic Publishers. (Edited proceedings).

Wurr, D.C.E., Clifford, S.C., Burton, K., Gray, D., Roberts, S.J., Conway, J., Brocklehurst, T., Parr, A., Newman, J. and Smith, A. (2003) HORTLINK 232 (csa 4965). Improving the quality and shelf-life of cut salad products. Final Report. (Report).

Clifford, S.C., Wurr, D.C.E., Hilton, H.W., Burton, K., Gray, D., Roberts, S.J., Conway, J., Brocklehurst, T., Parr, A., Newman, J. and Smith, A. (2002) HORTLINK 232 (csa 4965). Improving the quality and shelf-life of cut salad products. Annual Report for period April 2001 to April 2002: Year 3. (Report).

Hand, P., Vicente, J.G., Roberts, S.J., Soengas, P. and Pink, D.A.C. (2002) Genetic improvement in Brassicas: marker assisted selection for resistance to Xanthomonas campestris pv. campestris. In: Thirteenth Crucifer Genetics Workshop, Davis, California, USA, 23-26 March 2002, (Proceedings).

Hand, P., Vicente, J.G., Roberts, S.J., Soengas, P. and Pink, D.A.C. (2002) Marker assisted selection for genetic improvement in brassicas. In: Genotype-Phenotype: Narrowing the Gaps AAB Conference, Cirencester, 16-18 December 2002, (ed Association of Applied Biology). 18-CT97 -0172. 15pp., (Proceedings).

Holcroft, S.R. and Roberts, S.J. (2002) Hedera: Biology and epidemiology of Xanthomonas leaf spot. HDC HNS 92 Final Report 1998-2001. 57 pp. (Report).

Roberts, S.J. and Vicente, J.G. (2002) Bacterial canker of cherry (Prunus avium): biology, epidemiology, and resistance. MAFF Project WD0234 Final Report 2001-02. 18 pp. (Report).

Roberts, S.J., Brough, J. and Chakrabarty, S. (2002) Non-destructive seed testing for bacterial pathogens in germplasm material. Seed Science and Technology 30, 69-85. (Refereed paper).

Roberts, S.J. (2002) ISTA Plant Disease Committee Method Validation Programme. In: CSSA Symposium on Worldwde Seed Health Standardization Systems, Indianapolis, Indiana, 13 November 2002., (Oral presentation).

Roberts, S.J. (2002) Problems and pitfalls of comparative inter-laboratory testing. In: 4^th ISTA-PDC Seed Health Symposium, 29 April - 01 May 2002, pp. 1-6. (Edited proceedings).

Roberts, S.J. (2002) Reference Materials for seed health testing. HRI Annual Report (2000):(Popular article).

Roberts, S.J. and Akram, S. (2002) HDC HNS 91. Bacterial Diseases of HNS: Chemical Control. Final Report 2000-2002. 40 pp. Kent, UK: HDC. (Report).

Roberts, S.J. and Brough, J. (2002) Black rot of Brassicas: Epidemiology. Final Report for MAFF Project HH1744SHN, 1999-2002. 21 pp. (Report).

Roberts, S.J. (2002) Modelling the spread in of black rot in Brassica transplants. HRI Annual Report (2000):(Popular article).

Taylor, J.D., Conway, J., Roberts, S.J., Astley, D. and Vicente, J.G. (2002) Sources and origin of resistance to Xanthomonas campestris pv. campestris in Brassica genomes. Phytopathology 92, 105-111. (Refereed paper).

Vicente, J.G. and Roberts, S.J. (2002) Discrimination of Pseudomonas syringae isolates from Prunus avium and screening for resistance using micropropagated plantlets. In: 6^th International Conference on Pseudomonas syringae pathovars and related pathogens. Acquafredda di Maratea, Italy, 15-19 September 2002. pp. 31 (Edited proceedings).

Clifford, S.C., Wurr, D.C.E., Hilton, H.W., Burton, K., Gray, D., Roberts, S.J., Conway, J., Brocklehurst, T., Parr, A., Newman, J. and Smith, A. (2001) HORTLINK 232 (csa 4965). Improving the quality and shelf-life of cut salad products. Annual Report for period April 2000 to April 2001: Year 2. (Report).

Holcroft, S.R. and Roberts, S.J. (2001) Bacterial leaf spot of ivy (HNS 92). In: HDC HNS Open Day, HRI Efford, Sept 2001, (Abstract of oral presentation.).

Holcroft, S.R. and Roberts, S.J. (2001) Bacterial leaf spot of ivy: genetic diversity of the pathogen (Xanthomonas hortorum pv. hederae). In: HDC HNS Open Day, HRI Efford, Sept 2001, (Poster).

Roberts, S.J. (2001) Black rot of Brassicas. In: HRI Kirton Brassica Day, October 2001, (Oral presentation).

Roberts, S.J. and Akram, S. (2001) Application of peroxygen compounds as processing aids during salad and vegetable washing. Confidential Contract Report. HRI. (Report).

Roberts, S.J. and Akram, S. (2001) Bacterial Diseases of HNS: Chemical Control. In: HDC HNS Open Day, HRI Efford, Sept 2001, (Poster).

Roberts, S.J. (2001) Spear rot of Calabrese: Characterisation of the causal organism and disease epidemiology. MAFF Project HH1760 Final Report 1998-2001. 9 pp. (Report).

Roberts, S.J. (2001) Black rot of Brassicas: Epidemiology. Annual Report for MAFF Project HH1744SHN, 2000-2001. 6 pp. (Report).

Roberts, S.J. and Akram, S. (2001) HDC HNS 91. Bacterial Diseases of HNS: Chemical Control. Annual Report 2000-2001. (Report).

Roberts, S.J. and Vicente, J.G. (2001) Bacterial canker of cherry (Prunus avium): biology, epidemiology, and resistance. MAFF Project WD0224 Final Report 1999-2001. 10 pp. (Report).

Roberts, S.J. (2001) Extraction methods for Xanthomonas campestris pv. campestris from brassica seed. Contract Report. (Report).

Vicente, J.G. and Roberts, S.J. (2001) Diversity of Pseudomonas syringae isolates from sweet and wild cherry. In: Proceedings of the 11th Congress of the Mediterranean Phytopathological Union, Evora, Portugal, 17-20 Sept. 2001, pp. 29-31. (Edited proceedings).

Vicente, J.G., Conway, J., Roberts, S.J. and Taylor, J.D. (2001) Identification and origin of Xanthomonas campestris pv. campestris races and related pathovars. Phytopathology 91, 492-499. (Refereed paper).

Holcroft, S.R. and Roberts, S.J. (2000) Genetic diversity among isolates of Xanthomonas hortorum pv. hederae. In: BSPP Conference December 2000, (Abstract of oral presentation.).

Lyons, N.F., Roberts, S.J. and Taylor, J.D. (2000) Implementation of certified reference materials to support Community policies for monitoring seed health and to promote quality assurance systems in the seed production chain. Report for the period 1999. Wellesbourne: HRI. (Report).

Roberts, S.J. and Brough, J. (2000) Brassicas: use of copper sprays to control black rot during transplant production. Final Report HDC FV 186a. 15 pp. Kent, UK: HDC. (Report).

Roberts, S.J. and Holcroft, S.J. (2000) Hedera: Biology and epidemiology of Xanthomonas leaf spot. HDC HNS 92 Annual Report 1999-2000. 22 pp. (Report).

Roberts, S.J. and Vicente, J.G. (2000) Bacterial canker of cherry (Prunus avium): biology, epidemiology, and resistance. MAFF Project WD0224 Annual Report 1999-2000. 6 pp. (Report).

Roberts, S.J. (2000) Xanthomonas (Black rot) update. In: BGA/HDC Brassica Conference, Stoke Rochford, Grantham, UK. 27 January 2000, pp. 15-17. (Abstract of oral presentation).

Roberts, S.J. (2000) Black rot of Brassicas. HRIA/HDC Plant Propagators Day, HRI Wellesbourne, 9 November 2000 (Abstract)

Roberts, S.J. (2000) Black rot of Brassicas: Epidemiology. Annual Report for MAFF Project HH1744SHN, 1999-2000. 6 pp. (Report).

Taylor, J.D. and Roberts, S.J. (2000) Spear rot of Calabrese: Characterisation of the causal organism and disease epidemiology. MAFF Project HH1760 Annual Report 1999-2000. 6 pp. (Report).

Taylor, J.D. and Roberts, S.J. (2000) Spear rot of Calabrese: Characterisation of the causal organism and disease epidemiology. MAFF Project HH1760 Annual Report 1998-1999. 6 pp. (Report).

Vicente, J.G., Conway, J., Roberts, S.J. and Taylor, J.D. (2000) Resistance to Xanthomonas campestris pv. campestris in Brassica spp. In: Brassica 2000, 5-9 September 2000, HRI Wellesbourne, UK, (Abstract of poster).

Vicente, J.G., Conway, J., Roberts, S.J. and Taylor, J.D. (2000) Identification and origin of Xanthomonas campestris pv. campestris races and related pathovars. Brassica 2000.5-9 September 2000, HRI Wellesbourne, UK (Abstract)

Bulk, R.W.v.d., Langerak, C.J., Roberts, S.J. and Lyons, N.F. (1999) Microbial reference materials in seed health test standardization. In: Proceedings of 3rd ISTA Seed Health Symposium, Ames, Iowa, USA 16-19 August 1999.pp. 133-135. Zurich: ISTA. (Edited proceedings).

Langerak, C.J., Roberts, S.J., Taylor, J.D. and Bulk, R.W.v.d. (1999) Microbial Reference Materials for Harmonization and of Quality Control in Seed Health Testing. In: ISTA World Seed Conference,Cambridge, UK, 6-8 September 1999. (Proceedings).

Lyons, N.F., Roberts, S.J. and Taylor, J.D. (1999) Implementation of certified reference materials to support Community policies for monitoring seed health and to promote quality assurance systems in the seed production chain. Report for the period 1998/1999. Wellesbourne: HRI. (Report).

Roberts, S.J., Hiltunen, L.H., Hunter, P.J. and Brough, J. (1999) Transmission from seed to seedling and secondary spread of Xanthomonas campestris pv. campestris in Brassica transplants: effects of dose and watering regime. European Journal of Plant Pathology 105, 879-889. (Refereed paper).

Roberts, S.J. (Feb 18, 1999) Light down the black rot tunnel. Grower (February 18 1999): 18-19.(Popular article).

Roberts, S.J. and Holcroft, S.J. (1999) Hedera: Biology and epidemiology of Xanthomonas leaf spot. HDC HNS 92 Annual Report 1998-1999. 23 pp. (Report).

Roberts, S.J. (1999) Black rot of Brassicas: Epidemiology. Annual Report for MAFF Project HH1744SHN, 1998-1999. 6 pp. (Report).

Roberts, S.J. (1999) Thresholds, standards, tests, transmission and risks. In: Sheppard, J.W., (Ed.) Proceedings of 3rd ISTA Seed Health Symposium, Ames, Iowa, USA, 16-19 August 1999., pp. 20-24. Zurich, Switzerland: ISTA. (Edited proceedings).

Lyons, N.F., Roberts, S.J. and Taylor, J.D. (1998) Implementation of certified reference materials to support Community policies for monitoring seed health and to promote quality assurance systems in the seed production chain. Report for the period 1997/1998. 76 pp. Wellesbourne: HRI. (Report).

Roberts, S.J., Taylor, J.D., Redstone, S. and Fuller, M.P. (1998) Xanthomonas - more questions than answers. In: 1998 HDC Brassica Conference, Peterborough, UK, 4th February 1998. (Abstract of oral presentation).

Roberts, S.J. (1998) Aetiology and control of bacterial leaf spot of cherry laurel. Final Report MAFF Project HH1731SHN. 8 pp. (Report).

Roberts, S.J., Taylor, J.D., Redstone, S. and Fuller, M.P. (1998) Brassicas: development of a screening system to detect Xanthomonas campestris in seed and evaluation of pathogen resistance in seed parents of winter cauliflower. HDC FV 186 Final Report 1995-98. Report No. FV186f, 28 pp. East Malling: Horticulture Development Council. (Report).

Roberts, S.J., Walker, A., Cox, L. and Welch, S.J. (1998) Isolation of Isoproturon-degrading bacteria from treated soil via three different routes. Journal of Applied Microbiology 85, 309-316. (Refereed paper).

Roberts, S.J., Taylor, J.D., Redstone, S. and Fuller, M.P. (1998) Brassicas: development of a screening system to detect Xanthomonas campestris in seed and evaluation of pathogen resistance in seed parents of winter cauliflower. HDC FV 186 Annual Report 1996-1997. Report No. FV186a2, (Report).

Roberts, S.J. (1998) Management of Seedborne Bacterial Diseases. In: ISTA Workshop on Seedborne Diseases, Nagoya, Japan. 25-27 March 1998. (Edited proceedings).

Vicente, J.G., Ignatov, A., Conway, J., Roberts, S.J. and Taylor, J.D. (1998) Development of an improved Brassica differential series for the identification of races of Xanthomonas campestris pv. campestris. 7th International Congress of Plant Pathology, Edinburgh, Scotland 9-16 August 1998 (Abstract)

Ignatov, A., Vicente, J.G., Conway, J., Roberts, S.J. and Taylor, J.D. (1997) Identification of races of Xanthomonas campestris pv. campestris and sources of resistance. In: ISHS Symposium on Brassicas, 23-27 September 1997, Rennes, France. (Proceedings).

Redstone, S., Fuller, M.P., Roberts, S.J. and Taylor, J.D. (1997) A preliminary review of Xanthomonas campestris pv. campestris in the cauliflower crop in West Cornwall, U.K. In: ISHS Symposium on Brassicas, 23-27 September 1997, Rennes, France. (Proceedings).

Ridout, M.S. and Roberts, S.J. (1997) Improving quality control procedures for seed-borne pathogens by testing sub-samples of seeds. Seed Science and Technology 25, 195-202. (Refereed paper).

Roberts, S.J. (1997) Effect of weather conditions on local spread and infection by pea bacterial blight (Pseudomonas syringae pv pisi). European Journal of Plant Pathology 103, 711-719. (Refereed paper).

Roberts, S.J. (1997) Hardy Nursery Stock: Bacterial Diseases. HDC HNS 71 Final Report 1996-1997. Report No. HNS71f, 22 pp. (Report2).

Roberts, S.J. (1997) Top of the Spots (Bacterial Diseases of Hardy Nursery Stock). HDC News (No. 47 December 1997): 4-6.(Popular article).

Roberts, S.J. (1997) Modelling transmission of pea bacterial blight (Pseudomonas syringae pv pisi) from seed to seedling. In: Rudolph, K., Burr, T.J., Mansfield, J.W., Stead, D., Vivian, A. and Von Kietzell, J., (Eds.) Developments in Plant Pathology. Pseudomonas syringae pathovars and related pathogens, pp. 16-21. Dordrecht, The Netherlands: Kluwer Academic Publishers. (Edited proceedings).

Roberts, S.J. (1997) Bacterial diseases: a blight on the landscape. In: HDC Hardy Nursery Stock Conference: New Directions. 22-23 July 1997, Stoke-on-Trent, UK.pp. 43-45. HDC. (Proceedings).

Roberts, S.J. and Walker, A. (1997) Microbial degradation of pesticides in soil. Final Report MAFF Porject PL0508. 7 pp. (Report).

Taylor, J.D., Roberts, S.J., Redstone, S. and Fuller, M.P. (1997) Brassicas: development of a screening system to detect Xanthomonas campestris in seed and evaluation of pathogen resistance in seed parents of winter cauliflower. HDC FV 186 Annual Report 1995-1996. Report No. FV186a1, (Report).

Taylor, J.D., Roberts, S.J., Redstone, S. and Fuller, M.P. (1997) Black rot in Cornish Cauliflower. HDC News (No. 47 December 1997): 18-19.(Popular article).

Cox, L., Walker, A., Roberts, S.J. and Welch, S.J. (1996) Evidence for enhanced biodegradation of isoproturon in soils. In: COST 66, 6th International Workshop, Pesticides in Soil and the Environment, Stratford-upon-Avon, UK, 13-15 May 1996. (Proceedings).

Roberts, S.J., Ridout, M.S., Peach, L. and Brough, J. (1996) Transmission of pea bacterial blight (Pseudomonas syringae pv. pisi) from seed to seedling: effects of inoculum dose, inoculation method, temperature and soil moisture. Journal of Applied Bacteriology 81, 65-72. (Refereed paper).

Roberts, S.J. (1996) Report on an outbreak of black rot of brassicas (Xanthomonas campestris pv. campestrisi) in Kent, UK. 7 pp. Wellesbourne: HRI. (Report).

Walker, A., Welch, S.J. and Roberts, S.J. (1996) Induction and transfer of enhanced biodegradation of the herbicide napropamide in soils. Pesticide Science 47, 131-135. (Refereed paper).

Lyons, N.F., Taylor, J.D., Roberts, S.J., Maury, Y., Duby, C., Masmoudi, K., Faris-Mokaiesh, S., Corbiere, R., Mendes-Pereira, E., Spire, D., Samson, R., Malandrin, L., Grondeau, C., Franken, A.A.J.M. and Fraaije, B.A. (1995) International programme on the serological detection of bacterial, fungal and viral pathogens of protein pea seeds. EPPO Bulletin 25, 393-401. (Refereed paper).

Ridout,M.S. and Roberts,S.J. (1995) STpro: Seed Test analysis program. 1.0. HRI. PC. DOS. 3.5" Floppy Disk.

Ridout, M.S. and Roberts, S.J. (1995) Design and analysis of seed health assays. HRI Annual Report (1993-94): 64-65.(Popular article).

Roberts, S.J. (1995) Most Probable number methods for quantifying populations of pesticide degrading bacteria. In: Suett, D., (Ed.) ADSAP Workshop Reports, Banyuls, France, 28-30 September 1995.pp. 133-134. Brussels: CEC - DG XII. (Edited proceedings).

Roberts, S.J., Phelps, K., McKeown, B.M., Heath, M.C. and Cockerell, V. (1995) Effect of pea bacterial blight (Pseudomonas syringae pv. pisi) on the yield of spring sown combining peas (Pisum sativum). Annals of Applied Biology 126, 61-73. (Refereed paper).

Parekh, N.R., Suett, D.L., Roberts, S.J., McKeown, T. and Jukes, A.A. (1994) Carbofuran degrading bacteria from previously treated field soils. Journal of Applied Bacteriology 76, 559-567. (Refereed paper).

Parekh, N.R., Walker, A., Roberts, S.J. and Welch, S.J. (1994) Rapid degradation of the triazinone herbicide metamitron by a Rhodococcus sp. isolated from treated soil. Journal of Applied Bacteriology 77, 467-475. (Refereed paper).

Roberts, S.J., Parekh, N.R., Suett, D.L. and Walker, A. (1994) Microbiology of pesticide degradation. HRI Annual Report (1992-93): 82-83.(Popular article).

Roberts, S.J., McKeown, B.M., Heath, M.C. and Cockerell, V. (1993) Multi-site trials on pea bacterial blight. In: Proceedings of the 8th International Conference on Plant Pathology, Montreal 1993.pp. 117 (Proceedings).

Roberts, S.J., Walker, A., Parekh, N.R., Welch, S.J. and Waddington, M.J. (1993) Studies on a mixed bacterial culture which degrades the herbicide linuron. Pesticide Science 39, 71-78. (Refereed paper).

Roberts, S.J., Phelps, K., Taylor, J.D. and Ridout, M.S. (1993) Design and interpretation of seed health assays. In: Sheppard, J.W., (Ed.) Proceedings of the First ISTA Plant Disease Commitee Symposium on Seed Health Testing, Ottawa, Canada, pp. 115-125. Ottawa, Canada: Agriculture Canada. (Edited proceedings).

Roberts, S.J., McKeown, B.M., Heath, M.C. and Cockerell, V. (1993) Multi-site trials on pea bacterial blight. In: Ebbels, D., (Ed.) BCPC Monograph No 54: Plant Heatlh and the European Single Market.pp. 117 Farnham, Surrey: BCPC. (Proceedings).

Roberts, S.J. (1993) Book Review - Fundamentals of bacterial plant pathology. Journal of Agricultural Science 120, 419 (Popular article).

Roberts, S.J. (1993) Effect of bacterial blight (Pseudomonas syringae pv. pisi) on the growth and yield of single pea (Pisum sativum) plants under glasshouse conditions. Plant.Path 42, 568-576. (Refereed paper).

Roberts, S.J. (1993) The threat of pea bacterial blight to UK pea crops. In: Ebbels, D., (Ed.) BCPC Monograph No 54: Plant Heatlh and the European Single Market.pp. 123-133. Farnham, Surrey: BCPC. (Edited proceedings).

Schmit, J., Taylor, J.D. and Roberts, S.J. (1993) Sources of resistance to pea bacterial blight (Pseudomonas syringae pv. pisi). In: Proceedings of the 8th International Conference on Plant Pathology, Montreal 1993.pp. 180 (Abstract of poster).

Taylor, J.D., Roberts, S.J. and Lyons, N.F. (1993) The CEC protein pea program. HRI Annual Report (1991-92): 33-34.(Popular article).

Taylor, J.D., Phelps, K. and Roberts, S.J. (1993) Most probable number (MPN) method: origin and application. In: Sheppard, J.W., (Ed.) Proceedings of the First ISTA Plant Disease Committee Symposium on Seed Health Testing, Ottawa, Canada.pp. 106-114. (Edited proceedings).

Taylor, J.D., Roberts, S.J. and Schmit, J. (1993) Screening for resistance to pea bacterial blight. In: Lemattre, M., Freigoun, S., Rudolph, K. and Swings, J.G., (Eds.) 8th International Conference on Plant Pathogenic Bacteria, Versailles, France, June 9-12, 1992.pp. 1027 Paris: INRA. (Abstract of poster).

Walker, A. and Roberts, S.J. (1993) Degradation, biodegradation and enhanced biodegradation. In: Biagini-Lucca, G., (Ed.) Proceedings IX Simposium Pesticide Chemistry, Mobility and Degradation of Xenobiotics, Piacenza, 11-13 October 1993.pp. 357-370. (Edited proceedings).

Walker, A., Parekh, N.R., Roberts, S.J. and Welch, S.J. (1993) Evidence for enhanced degradation of napropamide in soil. Pesticide Science 39, 55-60. (Refereed paper).

Roberts, S.J. (1992) Effect of soil moisture on the transmission of pea bacterial blight (Pseudomonas syringae pv. pisi) from seed to seedling. Plant Pathology 41, 136-140. (Refereed paper).

Roberts, S.J. (1991) Report on visit by EC delegation to Canada and USA: Soya Beans (Seed Control - Equivalence and Plant Health). Technical visit to Canada and USA under the Community Seed Marketing and Plant Health Regime on seed of soya bean. Document No. 5. 10 pp. (Report).

Roberts, S.J., Reeves, J.C., Biddle, A.J., Taylor, J.D. and Higgins, P. (1991) Prevalence of pea bacterial blight in UK seed stocks, 1986-1990. In: Froud-Williams, R.J., Gladders, P., Heath, M.C., Jenkyn, J.F., Knott, C.M., Lane, A. and Pink, D.A.C., (Eds.) Aspects of Applied Biology 27, Production and protection of legumes.pp. 327-332. Wellesbourne, Warwick: Association of Applied Biologists. (Edited proceedings).

Roberts, S.J., Walker, A., Waddington, M.J. and Welch, S.J. (1991) Isolation of a bacterial culture capable of degrading linuron. In: BCPC Monograph No. 47. Pesticides in Soils and Water: Current Perspectives.pp. 54-58. Farnham, Surrey: BCPC. (Edited proceedings).

Walker, A., Suett, D.L. and Roberts, S.J. (1991) Environmental studies on pesticide degradation. HRI Annual Report (1990-91): 34-35.(Popular article).

Roberts, S.J. (1990) Report on an outbreak of pea bacterial blight in an overwintered crop growing near Chelmsford. Report to MAFF. 5 pp. (Report).

Roberts, S.J. (1990) Pea blight trial report for HRI-Wellesbourne. Report to MAFF. 4 pp. (Report).

Roberts, S.J. (1990) Pea blight multi-site trial preliminary report. Report to MAFF. 11 pp. (Report).

Roberts, S.J., Eden, G.S., Jones, P. and Ambler, D.J. (1990) Pseudomonas syzygii, sp. nov., the cause of Sumatra disease of cloves. Systematic and Applied Microbiology 13, 34-43. (Refereed paper).

Roberts, S.J. (1990) Book Review - Methods in Phytobacteriology. New Phytologist 116, 732-733. (Popular article).

Roberts, S.J. (1990) Playing Russian Roulette (Pea blight). Grower (September 6 1990): 26-29.(Popular article).

Roberts, S.J. (1989) Pea bacterial blight. Progress Report to the Ministry of Agriculture Fisheries and Food. 2 pp. (Report).

Roberts, S.J. (1989) Report on first comparative test. EC Pea Blight Seed Testing Collaboration. 12 pp. (Report).

Roberts, S.J. and Ambler, D.J. (1988) Sumatra disease of cloves. Rothamsted Experimental Station Report for 1987. 77 pp. (Report).

Roberts, S.J. and Ambler, D.J. (1988) Progress with identification methods for a fastidious xylem-limited bacterium which causes Sumatra disease of cloves in Indonesia. In: Cassells, A.C., (Ed.) Symposium on Bacterial and Bacteri-like Contaminants of Plant Tissue Cultures. Cork, Ireland, 23-25 September 1987. Acta Horticulturae 225, pp. 103-107. (Edited proceedings).

Roberts, S.J. and Ambler, D.J. (1987) Sumatra disease of cloves. Rothamsted Experimental Station Report for 1986. (Report).

Roberts, S.J. and Ambler, D.J. (1987) Progress report: Identification techniques for fastidious pathogens of plant vascular systems. Report to the Overseas Development Administration. Rothamsted Exp. Stn. (Report).

Roberts, S.J. and Ambler, D.J. (1986) Progress report: Identification techniques for fastidious pathogens of plant vascular systems. Report to the Overseas Development Administration. Rothamsted Exp. Stn. (Report).

Roberts, S.J. (1985) Some Bacterial Diseases of Hardy Ornamentals. In: BSPP Diseases of Ornamentals Workshop, Merrist Wood Agricultural College, Worplesdon, 30 October - 1 November 1985. (Proceedings).

Roberts, S.J. (1985) Bacterial diseases of woody ornamental plants. The University of Leeds. Ph.D.

Roberts, S.J. (1985) Variation within Pseudomonas syringae pv. philadelphi, the cause of a leaf spot of Philadelphus. Journal of Applied Bacteriology 59, 283-290. (Refereed paper).

Roberts, S.J. (1985) A note on Pseudomonas syringae pv. berberidis: comparative infection studies in attached and detached leaves. Journal of Applied Bacteriology 59, 369-374. (Refereed paper).

Roberts, S.J. (1985) Effect of irrigation method and of protection from rain on bacterial leaf spot of Berberis. In: BSPP Genetics and Plant Pathogenesis, December 1985. (Abstract, Poster, Proceedings).

Roberts, S.J. and Preece, T.F. (1984) A note on Pseudomonas syringae pv. berberidis infections of Berberis: aetiology of a leaf spot and leaf fall disease in England. Journal of Applied Bacteriology 56, 507-513. (Refereed paper).

Roberts, S.J. (1984) Bacterial leaf spot of Berberis caused by Pseudomonas syringae pv. berberidis. In: AAB/BSPP Bacterial Plant Diseases, Newcastle, July 1984. (Abstract of oral presentation).

Preece, T.F. and Roberts, S.J. (1983) Pseudomonas syringae causing a leaf spot and flower blight of Mock Orange, Philadelphus coronarius, in England. Plant Pathology 32, 461-463. (Refereed paper).