Table of contents
Ten years of scientific international cooperation
A. V. Vrânceanu (Romania) .....5
Genetic resemblance of sunflower cultivars tested in international trials
A. V. Vrânceanu, F. M. Stoenescu (Romania) .....9
Estimation of the heritability and genetic variation in sunflower (Helianthus annuus L.)
J. A. Kesteloot, J. Heursel, F. M. Pauwels (Argentina, Belgium) .....17
Sunflower breeding for resistance to Diaporthe/Phomopsis helianthi
D. Skoric (Yugoslavia) ..... 21
Anatomical features of the sunflower floret
D. Sammataro, M. B. Garment, E. H. Erickson, Jr. (U.S.A.) .....25
Stomatal density in sunflower Helianthus annuus L.
R. Tuberosa, U. Paradisi, P. Mannini (Italy) .....33
Nitrate-reductase activity and soluble protein content in leaves of young sunflower plants
Olga Gasic, M. Popovic, Veronica Lukic, Dragan Skoric, Marija Kraljevic-Balalic, Sunéica Bedov (Yugoslavia)..........37
Occurrence of sunflower collar rot disease caused by Sclerotium rolfsii in Pakistan
M. Siddique Mirza and L. K. Khokhar (Pakistan)..........41
Effects of some environmental and agronomic factors on charcoal rot of sunflower
A. Zazzerini, M. Monotti, R. Buonaurio, V. Pirani (Italy) .........45
Investigations related to the prognosis of sunflower stem canker (Diaporthe-Phomopsis)
H. Iliescu, V. Jinga, Alexandra Ciurea and Alina Ionitii (Romania)........ 51
Severe phosphorus deficiency in sunflower - the cause of foliar symptoms similar to those produced by sorne fungal pathoqens
M. N. Hunter and J. K. Kochman (Australia) .......................57
Sunflower response to winter plantings in a mediterranean environment
V. Gimeno, J. Ferncindez-Martinez, E. Fereres (Spain)..................63
Chemical weed-killers in sunflower : results of comparative tests
G. P. Vannozzi, E. Salera (Italy).......69
Réunion du sous-réseau "Protection intégrée du tournesol" (Pise, 16-22 Juin 1985)
Yves Regnault (France)....................77
