Volume 51Table of Contents Volume 51 (1), 1971 L.C. CALLBECK Screening of potato fungicides in 1970 Pages 1-2 H.A.H. WALLACE Cooperative seed treatment trials – 1970 Pages 3-8G.J. GREEN Cooperative seed treatment trials – 1970 Pages 9-10J.W. MARTENS Stem rust of oats i n Canada in 1970 Pages 11-13G. FLEISCHMANN Crown rust of oats i n Canada in 1970 Pages 14-16D.J. SAMBORSKI Leaf rust of wheat in Canada in 1970 Pages 17-19G. J. GREEN Stem rust of wheat, barley, and rye in Canada in 1970 Pages 20-23W.C. JAMES Importance of foliage diseases of winter wheat in Ontario in 1969 and 1970 Pages 24-31L.F. GATES, C.D. McKEEN, C.G. MORTIMORE, J.C. SUTTON, and A.T. BOLTON Southern leaf blight of corn in Ontario in 1970 Pages 32-37 Volume 51 (2), 1971W. CLIVE JAMES An illustrated series of assessment keys for plant diseases, their preparation and usage Pages 39-65RENE CRETE, LEON TARTIER, and THOMAS SIMARD Diseases of vegetables in organic soils of southwestern Quebec in relation to climate in 1969 and 1970 Pages 66-70R.V. CLARK Influence of chemical fungicide treatment of oat seed on seedling emergence, seed yield, and kernel weight Pages 71-75A.W. HENRY and C. ELLIS Seed infestation of flax in Alberta with the fungus causing browning or stem-break Pages 76-79K.C. SANWAL Economically important nematodes in contracted acreage of processing peas in eastern Ontario Pages 80-82J.M. POWELL Occurrence of Tuberculina maxima on pine stem rusts in western Canada Pages 83-85J.M. POWELL Additional records of Mycodiplosis larvae (Diptera: Cecidomyiidae) feeding on rust fungi Pages 86-87R. CRETE and L. TARTIER Prevalence of onion smut, Urocystis magica, and losses in organic soils of southwestern Quebec in 1970 Pages 88-90J.A. PARMELEE Marssonina leafspot of apple Pages 91-92 Volume 51 (3), 1971C.B.WILLIS, A.L. HENDERSON, D.J. HOUGH, and J.D. SECORD Nematodes associated with forage legume crops in Nova Scotia Pages 93-95B. BERKENKAMP Losses from foliage diseases of forage crops in central and northern Alberta in 1970 Pages 96-100L.J. PIENING A disease survey of cereals in central and northern Alberta, 1970 Pages 101-104W.C. MCDONALD, J.W. MARTENS, J. NIELSEN, G.J. GREEN, D.J. SAMBORSKI, G. FLEISCHMANN, C.C. GILL, A.W. CHIKO, and R.J. BAKER Losses from cereal diseases and value of disease resistance in Manitoba, and eastern and northern Saskatchewan in 1970 Pages 105-110ARTHUR W. CHIKO Distribution of barley stripe mosaic virus in Manitoba in 1970 Pages 111-115L.J. DUCZEK and R.A.A. MORRALL Sclerotinia in Saskatchewan in 1970 Pages 116-121D.G. FINLAYSON and C.J. CAMPBELL Fungicides for preventing clubroot of cauliflower in loam and peat soils Pages 122-126F. MARKS, J.L. TOWNSHEND, J.W. POTTER, Th. H. A. OLTHOF, and A. CORNELISSE Plant-parasitic nematode genera associated with crops in Ontario in 1970 Pages 127-128C.O. GOURLEY, G.W. BISHOP, and D.L. CRAIG Susceptibility of some strawberry cultivars to green petal Pages 129-130R.V. CLARK Influence of Vitavax seed treatment and loose smut infection on yields of barley and wheat Pages 131-133 Volume 51 (4), 1971C.O. GOURLEY Natural infection of tomato foliage by Pleospora herbarum Pages 135-137A.T. BOLTON and V.W. NUTTALL A highly virulent strain of cucumber mosaic virus occuring in cucumber in eastern Ontario Pages 138-141S.K. GAYED Effect of transplanting tobacco seedlings in peat pots on plant vigor and on susceptibility to thielaviopsis root rot Pages 142-144R.G. ROSS and C.A. EAVES Further observations on the effects of orchard fungicides on stored McIntosh apples Pages 145-147W.C. JAMES and T.R. DAVIDSON Survey of peach canker in the Niagara Peninsula during 1969 and 1970 Pages 148-153J.T. MILLS and H.A.H. WALLACE Microflora of buckwheat seed, changes in storage, and effect of seed treatments on seedling emergence Pages 154-158ARTHUR W. CHIKO Barley stripe mosaic virus in Manitoba in 1971 Pages 159-160J.W. MARTENS, G. FLEISCHMANN, and R.I.H. MCKENZIE Effect of Plantvax emulsifiable concentrate on stem and crown rusts of oats Pages 161-162V.R. WALLEN and H.R. JACKSON Aerial photography as a survey technique for the assessment of bacterial blight of field beans Pages 163-169C.L. LOCKHART Control of typhula snow mold on cold-stored strawberry runner plants Pages 170-172AUTHOR INDEX TO VOLUME 51 Pages 173-175