Volume 50

Table of Contents
Volume 50 (1), 1970

W.L. SEAMAN Summary of the prevalence of plant diseases in Canada in 1967 Pages 1
Noteworthy diseases and weather conditions Pages 1-7
Diseases of cereal crops Pages 8-11
Diseases of forage and field crops
	A. Forage legumes Pages 12-13
	B. Oil-seed crops Page 14
	C. Root crops Page 15
	D. Miscellaneous crops Page 16
	E . Cultivated and other grasses Pages 16-17
Diseases of vegetable crops Pages 18-30
Diseases of fruit crops
	A. Pome fruits Pages 30 -32
	B. Stone fruits Pages 32-33
	C. Ribes fruits Page 34
	D. Rubus fruits Page 34
	E. Other fruits Pages 35-37
Diseases of trees and shrubs Pages 37-40
Diseases of.herbaceous ornamentals Pages 40-41
Host index Pages 42-43
Index of contributors Pages 44-45
H.T. STULTZ and A.A. MacNAB Incidence of green petal disease in cultivated strawberry in the Maritime Provinces i n 1967 Pages 46-47
W.L. SEAMAN Noteworthy plant diseases i n Canada. 1968 Pages 48-57

Volume 50 (2), 1970
L.F. GATES The potential of corn and wheat t o perpetuate wheat streak mosaic in southwestern Ontario Pages 59-62
L.W. CARLSON and J. BELCHER Seed-treatment fungicides for control of conifer damping-off: Laboratory and greenhouse tests, 1968-1969 Pages 63-73
H.A.H. WALLACE and J.T. MILLS Effects of seed treatment on the viability of tough and damp cereal and flax seed Pages 74-79
J.T. MILLS and K. SCHREIBER Evaluation of chemicals in timed-release pellets for control of common root rot of wheat Pages 80-83
J. DREW SMITH and C.R. ELLIOTT Stem eyespot on introduced Festuca spp. in Alberta and British Columbia Pages 84-87
J.W. MARTENS and W.C. McDONALD Assessment of yield losses from barley yellow dwarf in oats Pages 88-89
C.L. LOCKHART, C.A. EAVES, and F.R. FORSYTH Losses from storage rot of McIntosh apples in Nova Scotia, 1962-68 Pages 90-92
C . L . LOCKHART Leaf spot of highbush blueberry caused by Godronia cassandrae f. vaccinii Pages 93-94

Volume 50 (3-4), 1970
J. DREW SMITH *Resistance of timothy cultivars to Heterosporium phlei, Drechslera phlei, and frost injury* Pages 95-98
JANOS HUDAK and PRITAM SINGH Incidence of armillaria root rot in balsam fir infested by balsam woolly aphid Pages 99-101
ROBERT SEWELL Plant-parasitic nematodes from Canada and abroad, 1969 Pages 102-103
A. CORNELISSE, F. MARKS, J.L. TOWNSHEND, TH.H.A. OLTHOF, and J.W. POTTER Plant-parasitic nematode genera associated with crops in Ontario in 1969 Pages 104-105
G. ALLAN PETRIE and T.C. VANTERPOOL Diseases of rape and other crucifers in Saskatchewan in 1969 Pages 106-107
C. L. LOCKHART Isolation of Gibbera compacta from cranberry and the effect of moisture and temperature on ascospore development Page 108
A.T. BOLTON, A.G. DONALDSON, and V.W. NUTTALL Variation in isolates of Fusarium solani f. pisi collected from processing peas in Ontario Pages 108-109
C.C. CHI Phytophthora root rot of alfalfa in Ontario in 1969 Pages 109-110
D.J. ORMROD and J.F. CONROY First record of white rot of onion in coastal British Columbia Pages 110-111
D.J. ORMRODE.C. HUGHES, and R.A. SHOEMAKER Newly recorded fungi from colonial bentgrass in coastal British Columbia Pages 111-112
W . C . MCDONALD Diseases and other factors affecting average yields of barley in Manitoba, 1954-1968 Pages 113-117
R.C. SINHA Elymana virescens, a newly described vector of wheat striate mosaic virus Pages 118-120
D. HOCKING Pythium intermedium, a newly recognized pathogen of coniferous seedlings in Canada Pages 121-123
ROBERT HALL Botryosphaeria spp. on Rosa sp. and Juniperus sabina Pages 124-125
HOWARD HARDING Foliage diseases of alfalfa in northern Saskatchewan in 1970 Pages 126-129
J.M. POWELL Cronartium comandrae in Canada, its distribution and hosts Pages 130-135
L.N. CHIYKOWSKI and A.T. BOLTON Distribution of a newly reported leafhopper-transmitted clover disease in eastern Ontario Pages 136-137
H. VAARTNOU Turf diseases in the Lower Mainland of British Columbia Pages 138-141
HOWARD HARDING *Incidence of Phoma medicaginis* in alfalfa seed produced in Canada and the U.S.A.** Pages 142-144
AUTHOR INDEX TO VOLUME 50 Pages 145-146