Abstracts of papers presented at the annual meeting of the Canadian Phytopathological Society Carleton University, Ottawa 22-25 June 1987

Abstract

Axenic culture of Endocronartium harknessii . Eric A. Allen and Y. Hiratsuka. Department of Plant Science, University of Alberta, Edmonton, Alberta T6E2G6, and Northern Forestry Center, Canadian Forestry Service, Edmonton, Alberta T6H 3S5.

Evaluation of a Chenopodium album pathogen for potential use as a mycoherbicide. W.G. Allan, A.K. Watson and L.A. Wymore. Department of Plant Science, Macdonald College of McGill University, Ste-Anne-de- Bellevue, Quebec H9X 1C0.

Attraction of Bradysia to soils with different levels of pH, nitrate and organic matter. Osama Anas and R.D. Reeleder. Department of Plant Science, Macdonald College of McGill University, Ste-Anne-de-Bellevue, Quebec H9X I CO.

Pod necrosis: a new disease affecting soybean on droughty soils in southwestern Ontario. T.R. Anderson. Research Station, Agriculture Canada, Harrow, Ontario NOR I GO.

Electrophoretic comparison of the protein composition of two closely related fungi: Fusarium oxysporum f.sp. radicis-lycopersici (FORL) and F. oxysporum f.sp. lycopersici (FOL). R. Belhadj, G. Thériault and P.M. Charest. Département de Phytologie, F.S.A.A., Université Laval, Ste-Foy, Québec G IK 7P4, and G. T. Tourbiéres Premier Ltée, B.P. 482, Rivière-du-Loup, Québec G5R3Z1,

Ultrastructural localization of cellulosic glucans and galactose in two fungi causing wilt diseases and in their host tissues by means of gold-conjugates. N. Benhamou, H. Chamberland, G.B. Ouellette and F.J. Pauzé. Département dephytologie, Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, Ste-Foy, Québec G1K 7P4.

Genetics of Ophiostoma ulmi, the causal agent of Dutch elm disease. L. Bernier, R.S. Jeng and M. Hubbes. Faculty of Forestry, University of Toronto, Toronto, Ontario M5 S l Al.

Correlation of temperature effects on resistance of soybeans to phytophthora rot with changes in phenylalanine ammonia-lyase (PAL), glyceollin production, and glyceollin I sensitivity. M.K. Bhattacharyya and E.W.B. Ward. Research Centre, Agriculture Canada, University Sub P. O., London, Ontario N6A 5B7.

Inheritance of variation in asexual generations of Phytophthora megasperma f.sp. glycinea (PMG). M.K. Bhattacharyya and E.W.B. Ward. Research Centre, Agriculture Canada, University Sub P.O., London, Ontario N6A 5B7.

New directions in forest products pathology. R.A. Blanchette. Department of Plant Pathology, University of Minnesota, St. Paul, MN 55108, USA.

Computers in forest disease research disease management and technology transfer. W.J. Bloomberg. Pacific Forestry Centre, Canadian Forestry Service, 506 W. Burnside Road, Victoria, British Columbia V8Z 1M5.

Early stages in axenic development of Melampsora Uni (flax rust). R. Boasson and Michael Shaw. Department of Plant Science, University of British Columbia, Vancouver, British Columbia V6TIV3.

Response of crabapple cultivars to fire blight. W. G. Bonn and D.C. Elfving. Research Station, Agriculture Canada, Harrow, Ontario NOR I GO, and Horticultural Research Institute of Ontario, Simcoe, Ontario N3Y4N5

The control of fusarium crown and root rot disease of tomato by root inoculation with alien pathogenic fungi. R.A. Brammall and V.J. Higgins. Horticultural Research Institute of Ontario, Horticultural Experiment Station, Box 587, Simcoe, Ont. N3Y4N5, and Department of Botany, University of Toronto, Toronto, Ontario M5S 1A1.

Involvement of Pythium spp. in the pre-emergence phase of canola seedling blight. A.I. Caiman and J.P. Tewari Department of Plant Science, University of Alberta, Edmonton, Alberta T6G 2P5.

Chemical control of phoma canker of parsnip. R.F Cerkauskas and B.D. McGarvey. Vineland Research Station, Agriculture Canada, Vineland Station, Ontario LOR 2E0.

Detection of sugars in paramural vesicles induced in tomato root cells infected by Fusarium oxysporum f. sp. radicis lycopersici (FORL) as revealed by gold complexée enzymes and lectins. H. Chamberland, N. Benhamou, G.B. Ouellette and F. J. Pauzé. Département de phyiologie, Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, Ste-Foy, Québec G1K7P4.

VIR encoded host range specificity of Agrobacterium tumefaciens pTi B6S3 in the Brassica genus. P.J. Charest, V.N. Iyer, and B.L. Miki. Department of Biology, Carleton University, Ottawa, Ontario K1S5B6, and (B.L.M.) Plant Research Centre, CEF, Agriculture Canada, Ottawa, Ontario K1A 0C6.

Role of post-harvest and spring applications of urea and Trichoderma reesei QM 9414 on the development of Venturia inaequalis. Marie Ciotola and Peterjurgen Neumann. Département de Sciences biologiques, Université de Montréal, C.P. 6128, Succursale "A", Montréal, Québec H3C3J7.

Induced resistance by plant and bacterial extracts on TMV-challenged Nicotiana leaf tissue. F. Côté and A. Asselin. Département de phyiologie, FSAA, Université Laval, Ste-Foy, Québec G1K7P4.

Incidence and etiology of stonefruit dieback in the Okanagan Valley of British Columbia. T.P. Cujec, R.J. Copeman, and P.L. Sholberg. Plant Science Department, University of British Columbia, Vancouver, British Columbia V6T2A2 and Research Station, Agriculture Canada, Summerland, British Columbia V0H IZ0.

Control of Rhizoctonia solani, causal agent of brown girdling root rot of canola/rapeseed by Pseudomonas fluorescens . J.S. Dahiyaand D.L. Woods. Research Branch, Agriculture Canada, Box tt29, Beaverlodge, Alberta TO H 0C0.

Phytoalexin accumulation in rapeseed leaves challenged with white rust (Albugo Candida). J.S. Dahiya and D.L Woods. Research Branch, Agriculture Canada, Box #29, Beaver lodge, Alberta TO H 0C0.

Inhibition of Ophiostoma ulmi by an ascomycete. P. Desrochers, N. Benhamou, R. Gardiner, and G.B. Ouellette.Department Sciences forestières et Centre de Recherche en Biologie Forestière, Université Laval, Saint-Foy, Québec G1K7P4, Département Phytologie, Université Laval, Saint-Foy, Québec G1K 7P4, Department of Plant Sciences, University of Western Ontario, London, Ontario N6A 5B7, and Centre de Foresterie des Laurentides, 1055 rue du Peps, Sainte- Foy, Québec G1V4C7

Accelerated biodÉgradation of metalaxyl in avocado, corn, and tobacco soils. S. Droby and M.D. Coffey. Department of Plant Pathology, University of California, Riverside, CA 92521, USA.

Pine root exudate stimulates the production of antifungal compounds in the ectomycorrhizal fungus Paxillus involutes . L.D. Duchesne, R.L. Peterson, and B.E. Ellis. Department of Botany, University of Guelph, Guelph, Ontario N1G2W1.

A highly abundant, elicitor-active protein from Phytophthoraparasitica. Edward E. Farmer and John P. Helgeson. Plant Pathology Department, University of Wisconsin-Madison. Wl53706, USA.

Ultrastructure of Pinus resinosa roots infected by Fusarium oxysporum. M. Farquhar. Department of Botany, University of Guelph, Guelph, Ontario N1G2W1.

The interaction of saprophytic or parasitic fungi with the nonhost plant Phaseolus vulgaris. Myriam R. Fernandez and Michèle C. Heath. Department of Botany. University of Toronto, Toronto, Ontario M5S IAI.

Control of Botrytis cinerea by antisera. R.B. Gardiner, W.E. McKeen, and A.W. Day. Plant Sciences Department, University of Western Ontario, London, Ontario N6A 5B7.

The pollination biology of the dwarf mistletoe, Arceuthobium americanum. Jeannie Gilbert and David Punter. Department of Botany, University of Manitoba, Winnipeg, Manitoba R3T 2N2.

Initiation of crown bud rot of alfalfa. B.D. Gossen. Research Station, Agriculture Canada, 107 Science Crescent, Saskatoon, Saskatchewan S7N 0X2.

Genetically engineered secretion of mammalian and bacterial proteins from Aspergillus nidulans. D. Gwynne, F. Buxton, S.A. Williams, S, Garven, and R.W. Davies. Allelix Inc., Mississauga, Ontario.

Control of wart disease of potato by crabmeal. M.C. Hampson. Research Station, Agriculture Canada, P.O. Box 7098, St. John's, Newfoundland AIE3 Y3..

Resting spore germination in Synchytrium endobioticum. M.C. Hampson. Research Station, Agriculture Canada, P.O. Box 7098, St. John's, Newfoundland AIE3 Y3.

New passive mechanisms of resistance to Botrytis fabae in the phyllosphere of Vicia faba. S.B. Hanounik and M.A. Hasanain. The International Center for Agricultural Research in the Dry Areas (ICARDA), P.O. Box5466, Aleppo, Syria.

Speciation in plant pathogenic fungi: the influence of agricultural practice. E.M. Hansen. Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97331, USA.

Scanning and transmission electron microscope studies on the resting spore formation and germination of Olpidium brassicae. C. Hiruki. Department of Plant Science, University of Alberta, Edmonton, Alberta T6G 2P5.

Root disease of alfalfa caused by Aphanomyces euteiches in Wisconsin. E.B. Holub and C.R. Grau. University of Wisconsin, Madison, Wl 53706, USA.

Observations on the method of infection of Endocronartium harknessii on hard pines. A. Hopkin, J. Reid, and E. Allen. Northern Forestry Center, Canadian Forestry Service, Edmonton, Alberta T6H 3S5, Department Botany, University of Manitoba, Winnipeg, Manitoba, R3T2N2, and Department of Plant Science, University of Alberta, Edmonton, Alberta T6E2G6.

Forest tree declines of past and present: current understanding. David R. Houston. USDA Forest Service, Hamden, CT06514, USA.

Influence of biotechnology in forest disease research and disease control. M. Hubbes. Faculty of Forestry, University of Toronto, Toronto, Ontario M5S 1A1.

Identifying genotypes of Heterobasidion annosum: plating reactions and isozyme electrophoresis. T. Hsiang, R.L. Edmonds, and C.H. Driver. College of Forest Resources, University of Washington, Seattle, WA 98195, USA.

Effects of VA mycorrhizae and metalaxyl on growth of alfalfa seedlings in soils from "alfalfa sickness" fields in Alberta. S.F. Hwang. Alberta Environmental Centre, Vegreville, Alberta TOB 4ID.

Spore surface morphology of aeciospores, urediospores, and teliospores of Vromyces trifolii-repentis. S.F. Hwang, M.E. Neuwirth, and K.F. Chang. Alberta Environmental Centre, Vegreville, Alberta TOB 4L0, and Department of Plant Science, University of Alberta, Edmonton, Alberta T6G 2P5.

Yeast-like antagonists of powdery mildew on greenhosue cucumbers. W.R. Jarvis, L.A. Shaw, and J.A. Traquair. Research Station, Agriculture Canada, Harrow, Ontario NOR 1 GO.

Low cerato-ulmin-producing mutants from an aggressive isolate of Ophiostoma ulmi, the causal agent of Dutch elm disease. R.S. Jeng, L. Bernier, and A.M. Svircev. Faculty of Forestry, University of Toronto, Toronto, Ontario M5S 1A1.

Localization of an intramycelial protein in Ophiostoma ulmi by gel electrophoresis and immunocytochemistry. R.S. Jeng and A.M. Svircev. Faculty of Forestry, University of Toronto, Toronto, Ontario M5S 1A1.

Influence of crop sequence on disease, response to fungicides, nitrogen efficiency and yield of spring barley. H.W. Johnston, J.A. MacLeod, and R.M. Martin. Research Station, Agriculture Canada, Charlottetown, Prince Edward Island CIA 7M8.

Status and control of cylindrocladium root rot in Ontario provincial forest nurseries. J. Juzwik, B.H. McGauley, and K..R. Reese. Pest Control Section, Ministry of Natural Resources, Maple, Ontario LOJ 1E0, and Midhurst Nursery, Ministry of Natural Resources, Midhurst, Ontario LOL lKO.

Allelopathic biocontrol of fusarium crown and root rot in greenhouse tomatoes. T.R. Kasenberg and J.A. Traquair. University of Western Ontario, London, Ontario N6A 5B7, and Research Station, Agriculture Canada, Harrow, Ontario NOR 1G0.

Assessment of Xanthomonas campestris py.phaseoli and Pseudomonas syringae pv. phaseolicola as primary inocula in bean blights. G. Kritzman and L.V. Edgington. Department of Environmental Biology, University of Guelph, Guelph, Ontario NIG2WI.

Gremmeniella abietina on Pinus griffithii and P. koraiensis in Quebec. G. Laflamme, A. Corriveau, and G.B. Ouellette. Laurentian Forestry Centre, Canadian Forestry Service, Sainte-Foy, Québec G1V4C7.

Area measurement and disease quantification with computer image analysis. L. Lamari and C.C. Bernier. Department of Plant Science, University of Manitoba, Winnipeg, Manitoba R3T2N2.

SIMULEP: an interactive and modified version of EPIMUL. L. Lamari and S.R. Rimmer. Department of Plant Science, University of Manitoba, Winnipeg, Manitoba R3T2N2.

Seed treatments control gray snow mold of winter wheat. M.B. Lawton, L.L. Burpee, and L.G. Goulty. Department of Environmental Biology, University of Guelph, Guelph, Ontario NIG2WI.

Lysozyme-like activity leaking from germinating radish seeds. D. LeQuéré, A. Asselin. D[wacute]partement de phytologie, FSAA, Université Laval, Ste-Foy, Québec GIK7P4.

Comparing different statistical analysis techniques used for proportions. C.A. Lévesque and D.M. Eaves. Center for Pest Management and Department of Mathematics and Statistics, Simon Fraser University. Burnaby, British Columbia V5A 1S6.

Characterization of the suppressing molecules present in the intercellular fluids from Phaseolus vulgaris cv. Pinto leaves infected with Uromyces appendiculatus. Aimin Li and Michèle C. Heath. Department of Botany, University of Toronto, Toronto, Ontario M5S 1AI.

Virulence genotypes of Erysiphe graminis f.sp. hordei in S.W. Ontario. J.H. Louter, D.E. Falk, and B.H. MacNeill. Department of Crop Science and Department of Environmental Biology, University of Guelph, Guelph, Ontario NIG 2W1.

Protein differences and similarities within an asexual race cluster of Puccinia graminis f. sp. tritici . D.J. Maclean, W.R. Bushnell, C.P. Vance, and A.P. Roelfs. Department of Biochemistry, University of Queensland, St. Lucia Q 4067, Australia; (WRB and APR) Cereal Rust Laboratory, ARS USDA, University of Minnesota, St Paul MN 55108 USA; and (CPV) ARS USDA and Department of Agronomy, Univ of Minnesota, St Paul, MN 55108, USA. The North American asexual population of P. graminisf. sp.

Studies of sugar maple decline in the province of Ontario. W.D. Mcllveen and D.B. McLaughlin. Phytotoxicology Section, Ontario Ministry of the Environment, 880 Bay Street, Toronto, Ontario M5S IZ8.

The potential for a return of Castanea dentata in Southern Ontario. C. D. McKeen and J. Ambrose. Ottawa, Canada, K2 H 5 YI, and University of Guelph, Guelph, Ontario, N1G2WI.

Comparison of the parasitic fitness of races of Erysiphe graminis f.sp. tritici with different levels of virulence. J.G. Menzies and B.H. MacNeill. Department of Environmental Biology, University of Guelph, Guelph, Ontario NIG 2 Wl.

Inheritance of maackiain metabolizing ability in Nectria haematococca. V. Miao and H.D. VanEtten. Department of Plant Pathology, Cornell University, Ithaca, NY 14853-5908, USA.

Elucidating the function of vascular coating material through the use of anomalous wilt host phenotypes in alfalfa. G. Newcombe and J. Robb. Department of Botany, and Department of Molecular Biology and Genetics, University of Guelph, Guelph, Ontario N1G2W1.

Resolving sampling problems in order to develop cytological assays for alfalfa resistance to verticillum wilt. A.G. Newcombe and Jane Robb. Departments of Botany and Molecular Biology and Genetics, University of Guelph, Guelph, Ontario N1G2W1.

Persistence of iprodione resistant Botrytis cinerea in Ontario vineyards. J. Northover. Research Station, Agriculture Canada, Vineland Station, Ontario LOR 2E0.

Effect of substances collected in situ from the rhizosphere of potato plants and of known phenolic compounds on the growth of Rhizoctonia solani in vitro. B.E. Otrysko, G.J. Banville, and A. Asselin. M.A.P.A.Q. Stn. de recherches Les Buissons, C.P. 55, R.R.l, Pte.-aux-Outardes, Québec GO H 1 MO; (A. A.) Département de phytologie, Université Laval, S te. Foy, Québec G1K 7P4.

Use of isoenzymes in the taxonomy of Phytophthora spp. Peter Oudemans and M.D. Coffey. Department of Plant Pathology, University of California, Riverside, C A 92501,

Use of high performance ion chromatography with conductivity detection for quantitative determination of organic phosphonates, phosphonate, and other inorganic anions in plants and soil. D. Ouimette and M.D. Coffey. Department of Plant Pathology, University of California, Riverside, CA 92521, USA.

Effect of tunicamycin, 2-deoxy-d-glucose (DDG), EGTA, and monensin on nonhost responses of bean plant, Phaseolus vulgaris, infected with cowpea rust fungus, Uromyces vignae. C.J. Perumalla and Michèle C. Heath. Department of Botany, University of Toronto, Toronto, Ontario M5S1Al.

The induction of phenylalanine ammonia-lyase in verticillium-infested tomato petioles. D.A. Powell and J. Robb. Department of Molecular Biology and Genetics, University of Guelph, Guelph, Ontario N1G2W1.

Reaction of faba bean to Rhizoctonia solani and virulence of selected isolates of the fungus. K.Y. Rashid and C.C. Bernier. Department of Plant Science, University of Manitoba, Winnipeg, Manitoba R3T 2N2.

Histopathology of various nonhost plants inoculated with Ophiostoma ulmi . D. Rioux and G.B. Ouellette. Département des Sciences forestiéres, Laval university, Ste-Foy, Québec G1K4C7.

Forest pathology: present and future. J. Rishbeth. Botany School, Downing Street, Cambridge, CB2 3EA, England.

The role of vascular coating material in tomato resistance to Verticillium albo-atrum. J. Robb, D.A. Powell, and P.F.S. Street. Department of Molecular Biology and Genetics, University of Guelph, Guelph, Ontario NIG 2 Wl.

Assessing resistance to sclerotinia diseases in sunflower and Brassica species using rate of lesion development. F.S. Sedun, J.F. Brown and G. Seguin-Swartz. Research Station, Agriculture Canada, 107 Science Crescent, Saskatoon, Saskatchewan S7N 0X2.

The effect of heat shock on the axenic development of Melampsora Uni (flax rust). Michael Shaw and R. Boasson. Department of Plant Science, University of British Columbia, Vancouver, British Columbia V6T1V3.

Mutational analysis of the Erysiphe graminis-barley interaction. S.C. Somerville and J.E. Sherwood. DOE — Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA.

Occurence and elimination of pathogenic Erwinia amylovora on mature apple fruit in British Columbia. P.L. Sholberg, A.P. Gaunce, and G.R. Owen. Research Station, Agriculture Canada, Summerland, British Columbia V0H 1Z0.

Mansonone induction by Ophiostoma ulmi in callus cultures of elm species. M. Szczegola, R. Jeng, and M. Hubbes. Faculty of Forestry, University of Toronto, Toronto, Ontario M5S IAI

Effect of crop rotation and flooding on the onion white rot fungus in organic soil. E. Valdes and L.V. Edington. Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G2W1.

Investigations of Erysiphe graminis f.sp. hordei in Hordeum vulgare using immunocytochemistry. C. Van Roestel, A.W. Day, and W.E. McKeen. Plant sciences Department, University of Western Ontario, London, Ontario N6A 5B7.

Sapwood decay systems of spruce budworm killed balsam fir in Newfoundland. G.R. Warren. Newfoundland Forestry Service, Canadian Forestry Service, P.O. Box6028, St John's, Newfoundland AlC 5X8.

The pinewood nematode and pine wilt disease. J.M Webster and T.A. Rutherford. Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A IS6.

Evaluation of resistance to Leptosphaeria nodorum and Pyrenophora tritici-repentis in wheat. L.S.L. Wong and G.R. Hughes. Department of Crop Science and Plant Ecology, University of Saskatchewan, Saskatoon, Saskatchewan S7N0W0.

Inoculation experiments of lodgepole pine with four blue stain fungi associated with mountain pine beetle, monitored by a heat pulse velocity (VPH) instrument. Y. Yamaoka, R.H. Swanson, and Y. Hiratsuka. Northern Forestry Centre, Canadian Forestry Service, Edmonton, Alberta, T6H 3S5.