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Long-term research in pepper organic production are scarce in Republic of Macedonia. Plant and fruit morphological traits of important pepper varieties organically produced were compared to pepper produced in conventional systems. Conceivably, this is the first morphological traits comparative study of locally important pepper genotypes (Capsicum annuum L.) in Republic of Macedonia in organic and conventional open-field production. The aim of the research is to determine the differences in pepper morphological traits when produced organically in comparison to conventional production. Eight plants and fruits were used for morphological traits determination of plant and fruit in six locally important pepper genotypes (Strumicka Kapija, Strumicka Vezena, Piran, Zupska Rana, Duga Bela and Kurtovska Kapija) grown in an organic and conventional production system.
The traits number or branches per plant, fruit width and fruit index were significantly affected by the production manner resulting in less branches per plant, lower fruit width and lower fruit index in organic production. The traits fruit weight, pericarp thickness and fruit flesh percentage, which are the most important for pepper crop yield and utilisation of pepper fruits were not significantly affected by the production practice. Organic production has limited influence on pepper plant and fruit traits, but not in a manner to decrease the production, which generally is the main fear of conversion from conventional to organic production in vegetables. Appropriate selection of pepper varieties with application of suitable cultivation and management practices can contribute to successful organic production resulting in high quality pepper production.