Vol. 19 (1989)

Research Articles

• List of rare, endemic and threatened plants in Romania (II)

  I. MOLDOVAN, Denes PAZMANY, L. DRAGOS

  67-80

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• Investigations on biological control of weeds in Romania

  Teodosie PERJU, Alexandru SALONTAI

  81-84

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• Seminifagous insects growing on inflorescences of Centaurea species (Asteraceae)

  Teodosie PERJU, I. MOLDOVAN

  85-90

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• Research on the biology of Echinacea angustifolia (Dc.) Moench and Echinacea purpurea (L.) Moench

  Leon Sorin MUNTEAN, Alexandru SALONTAI, Mircea TAMAS, Constantin BOTEZ, Felicia VAIDA

  91-100

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• New natural carotenoid sources. V. Chlorophyll and carotenoid content of Beta vulgaris

  Gavrila NEAMTU, Zoltan NAGY, C. DORNEA

  101-106

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