HELIA 08

1985

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

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

Sunflower response to winter plantings in a mediterranean environment
V. Gimeno, J. Ferncindez-Martinez, E. Fereres (Spain)..................63