Volume 53Table of Contents Volume 53 (1), 1973 Table of Contents Volume 53 (1), 1973R.G. ROSS and C.O. GOURLEY Crown rot of apple trees in Nova Scotia Pages 1-4 J.T. MILLS and W.H. SILVERSIDES Effect of Z-(thiocyanomethylthio) benzothiazole (TCMTB) on emergence and germination of cereals, flax, and rape Pages 5-10B. BERKENKAMP Disease assessment and losses in forage crops in central and northern Alberta, 1972 Pages 11-15L.S. THOMPSON, J.A. CUTCLIFFE, C.O. GOURLEY, and R.A. MURRAY Evaluation of several insecticides for control of strawberry green petal disease Pages 16-18G. ALLAN PETRIE Diseases of Brassica species in Saskatchewan, 1970-72. I. Staghead and aster yellows Pages 19-25G. ALLAN PETRIE Herbicide damage and infection of rape by the blackleg fungus, Leptosphaeria maculans Pages 26-28E.J. HAWN Plant-parasitic nematodes in irrigated soils of Alberta Pages 29-30Th.H.A. OLTHOF and B.E. HOPPER Distribution of Pratylenchus spp. and other stylet-bearing nematode genera in soils in the flue-cured tobacco area of southern Ontario Pages 31-33ROBERT SEWELL Plant-parasitic nematodes from Canada and abroad, 1971 Pages 34-35B. BERKENKAMP, L.P. FOLKINS, and JOAN MEERES Diseases of Elymus and other grasses in Alberta, 1972 Pages 36-38J.W. POTTER and J.L. TOWNSHEND Distribution of plant-parasitic nematodes in field crop soils of southwestern and central Ontario Pages 39-48P.K. BASU, R. CRETE, A.G. DONALDSON, C.O. GOURLEY, J.H. HAAS, F.R. HARPER, C.H. LAWRENCE, W.L. SEAMAN, H.N.W. TOMS, S.I. WONG, and R.C. ZIMMER Prevalence and severity of diseases of processing peas in Canada, 1970-71 Pages 49-57L.F. GATES Incidence of wheat spindle streak mosaic in Essex, Kent, and Lambton counties, Ontario, 1969-72 Pages 58-59HOWARD HARDING and R.A.A. MORRALL First record of Gymnosporangium clavipes on Malus sp. in western Canada Page 60R.G. PLATFORD and C.C. BERNIER Diseases of rapeseed in Manitoba in 1972 Page 61 Volume 53 (2), 1973L.N. CHIYKOWSKI, S . R . COLPITTS, L . J . COULOMBE, R.W. DELBRIDGE, C.O. GOURLEY, C.H. LAWRENCE, R.A. MURRAY, J. SANTERRE, and L.S. THOMPSON Strawberry green petal disease i n Quebec and the Maritime Provinces, 1971-72 Pages 63-66J . M . POWELL, and Y. HIRATSUKA Serious damage caused by stalactiform blister rust and western gall rust to a lodgepole pine plantation in central Alberta Pages 67-71W.A.F. HAGBORG Gray speck of oats in western Canada Pages 72-78C.O. GOURLEY, and R.W. DELBRIDGE Botrytis fabae and Ascochyta fabae on broad beans i n Nova Scotia Pages 79-82G. ALLAN PETRIE Diseases of Brassica species in Saskatchewan, 1970-72 II. Stem,pod,and leaf spots Pages 83-87G. ALLAN PETRIE Diseases of Brassica species in Saskatchewan, 1970-72 III. Stem and root rots Pages 88-92F.R. HARPER A key to standardize the description of growth stages in turnip rape, Brassica campestris Pages 93-95V.R. WALLEN, D. GALWAY, H.R. JACKSON, and L . E . PHILPOTTS Aerial survey for bacterial blight , 1970 Pages 96-98C.L. LOCKHART, I . V . HALL, and R.A. MURRAY Yield losses in cranberry in Nova Scotia, 1969-72 Pages 99-100J. DUECK, and H.A. QUAMME Fireblight in southern Ontario in 1972 Pages 101-104D.B.O. SAVILE Rusts that pass import inspection Pages 105-106ARTHUR W. CHIKO Barley stripe mosaic in the Canadian prairies in 1972 Pages 107-111 Volume 53 (3), 1973R.J. LEDINGHAM, T.G. ATKINSON, J.S. HORRICKS, J.T. MILLS, L.J. PIENING, and R.D. TINLINE Wheat losses due to common root rot in the prairie provinces of Canada, 1969-71 Pages 113-122I.R. EVANS Seed-borne bean yellow mosaic virus of fababean in Canada Pages 123-126C.D. McKEEN Occurrence, epidemiology, and control of bacterial canker of tomato in southwestern Ontario Pages 127-130J.L. TOWNSHEND, C.B. WILLIS, J.W. POTTER, and J. SANTERRE Occurrence and population densities of nematodes associated with forage crops in eastern Canada Pages 131-136J.L. TOWNSHEND, J.L. EGGENS, and N.K. McCOLLUM Turf grass hosts of three species of nematodes associated with forage crops Pages 137-141C.F. MARKS, J.L. TOWNSHEND, J.W. POTTER, Th.H.A. OLTHOF, P.W. JOHNSON, and J. LOUNSBERY Plant-parasitic nematode genera associated with crops in Ontario in 1972 Pages 142-143R.G. ROSS,and A.D. CROWE Replant disease in apple orchard soil Pages 144-146J.A. PARMELE Puccinia allii on garlic, an interception Pages 147-149C.D. McKEEN, J.M. FULTON, and W.I. FINDLAY Fleck and acidosis of potatoes in southwestern Ontario Pages 150-152R.P. SINGH, and R.E. FINNIE Seed transmission of potato spindletuber metavirus through the ovule of Scopolia sinensis Pages 153-154S.T. ALI-KHAN, R.C. ZIMMER, and E.O. KENASCHUK Reaction of pea introductions to ascochyta foot rot and powdery mildew Pages 155-156J.C. SUTTON Fungi associated with the rusty root disorder of muckgrown carrots in Ontario Pages 157 Volume 53 (4), 1973W.C. JAMES, C.S. SHIH, and L.C. CALLBECK Survey of fungicide spraying practice for potato late blight in Prince Edward Island, 1972 Pages 161-166WAYNE R. ALLEN Nontransmissible, virus-like disorders of pome fruits in Ontario Pages 167-169C.F. MARKS and T.R. DAVIDSON Effects of preplant and postplant nematicides on populations of nematodes in the soil and on growth of fruit trees in the Niagara Peninsula Pages 170-174G.R. WEBSTER and E.J. HAWN Distribution of Paratylenchus projectus in central and northern Alberta Pages 175-177J.T. MILLS Cooperative seed treatment trials – 1973 Pages 178-181A. FUNK and J.A. BARANYAY Additional fungi and a gall disease of dwarf mistletoe swellings in western hemlock Page 182RUTH HORNER ARNOLD and A.E. STRABY Phomopsis elaeagni on Russian olive (Elaeagnus angustifolia) in Canada Pages 183-186D.L. MCKENZIE and R.A.A. MORRALL Diseases of three specialty legume crops in Saskatchewan in 1972: field pea, lentil, and fababean Pages 187-190D . J . S . BARR Rhizophdium raminis (Chytridiales): morphology, host range, and temperature effect Pages 191-193J.L. TOWNSHEND and J.W. POTTER Nematode numbers under cultivars of forage legumes and grasses Pages 194-195J.L. TOWNSHEND and J.W. POTTER Some observations on the survival and development of Helicotylenchus digonicus under alfalfa Pages 196-198AUTHOR INDEX TO VOLUME 53 Pages 199-201