Table of contents
Results of the international trials with sunflower cultvars (the fifth cycle 1984-1985)
Alex V. Vrânceanu, F. M. Stoenescu, Gabriela Soare (Romania)..... 5
Results of preliminary investigations on sunflower cultivars at Samaru, Nigeria
S. G. Ado, B. Tanimu (Nigeria) ...... 13
Molecular approach of cytoplasmic male sterility in sunflower
C.Perez, Y. Mansais, A. Bervillé, P. Heizman (France)..... 17
A contribution. to the diversification of cytoplasmic male sterility sources in sunflower
A V. Vrânceanu, Monica Iuoras, F. M. Stoenescu (Rumania)...... 21
Oil yield of sunflower as a graphic model of the values of a complex character
Anton Kovacik, V. Skaloud (Czechoslovakia).....27
Photosynthetic efficiency as basis for yield formation in sunflower hybrid NS-H43 and its parental lines
T. Cupina, M. Plesnicar, Dragan Skoric (Yugoslavia) ...... 33
The influence of nitrogen nutrition on net assimilation. and yield formation in sunflower
R. Blanchet, G. Cavalie, M. Piquemal, N. Gelfi, Y. Duprat, E. Martinez (France) . 39
Study of the main elements of the fertilization system in sunflower (Helianthus annuus L.) by means of 15N
Cr. Hera, I. Toncea (Romania).....47.
Effect of spacing and nitrogen on the yieid and yield components of sunflower under rainfed conditions
Hammad Yousaf, Akhtar. Beg, A Shakoor' (Pakistan).....53
Productivity of sunflower hybrids in relation to plant density and irrigation
B.S. Janagoudar, C.V. Patil, R. Muniraj Appa.....57
The pattern of seed set within the capitulum of sunflower and its influence on germination and seedling vigour
T. G. Prasad, M. N. Merwade, K. Giriraj, M. Udaya Kumar (India)..... 61
The influence of hoeing and earthing-up in conjunction with chemical weed-killers on sunflower yield
E. Salera, G. P. Vannozzi (Italy) . .....67
The effect of Phomopsis sp. infection of grain yield and oil content of sunflower plants
M Acimovic(Yugoslavia).......73
INFORMATION AND REPORTS
Working meeting on sunflower genetics and wild species (Sindos, .Grèece, 22-25 - July 1986)
F. M. Stoenescu (Romania) ....................77
Progress report on collection, evaluation and conservation of wild species and their use in sunflower breeding progammes (1984-1986)
Dragan Skoric(Yugoslavia)
Announcements of international sunflower events.....81
