Institute of Agriculture

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    DIFFERENT APPLICATION METHOD OF GA₃ AS AN AGROTEHNICAL TOOL INFLUENCING THE FRUIT QUALITY OF FLAME SEEDLESS GRAPE VARIETY (VITIS VINIFERA L.)
    (Институт по лозарство и винарство – Плевен Регионален исторически музей – Плевен, 2025)
    Rajchin, Viktor
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    Nedelkovski, Dushko
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    Gjosheva Kovachevikj Marija
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    Popovska Stojanov Despina
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    Agri-food import dependency and certain determinants in the context of the EU integration processes: Evidence from Bosnia and Herzegovina, North Macedonia and Croatia
    (University of Banja Luka, Faculty of Agriculture, 2025-05)
    Gjosheva Kovachevikj Marija
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    Mrdalj, Vesna
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    Popovska Stojanov Despina
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    Cagalj, Marin
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    Dimitrov, Lazo
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    Key Determinants Influencing Income Diversification Among Rural Households in North Macedonia
    (University of Osijek, Faculty of Agrobiotechnical Sciences Osijek, 2025)
    Gjosheva Kovachevikj Marija
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    Mrdalj, Vesna
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    Popovska Stojanov Despina
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    Dimitrov, Lazo
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    ALTITUDE AS A FACTOR ON THE AMPELOMETRIC CHARACTERISTICS OF THE LEAVES OF VRANEC VARIETY
    (Ss. Cyril and Methodius University in Skopje, Institute of Agriculture – Skopje, 2026-03)
    Nedelkovski, Dushko
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    Rajchin, Viktor
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    Popovska Stojanov Despina
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    Gjosheva Kovachevikj Marija
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    Beleski, Klime
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    ETHNOBOTANICAL AND PHYTOCHEMICAL ACTIVITIES OF Rosa canina L. FROM R.N. MACEDONIA
    (Chamber of Organic Producers– COP, Kumanovo, Republic of North Macedonia, 2026)
    Selamovska, Ana
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    Taseska-gjorgjijevski Milena
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    Gjosheva Kovachevikj Marija
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    Selamovski, Filip
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    Bardakoski, Zoran
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    AGRO-ECOTOURISM DEVELOPMENT POTENTIAL AS A DRIVER OF RURAL ECONOMIC DIVERSIFICATION IN MACEDONIA
    (Chamber of Organic Producers– COP, Kumanovo, Republic of North Macedonia, 2026)
    Gjosheva Kovachevikj Marija
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    Assessment of seed viability of Oryza sativa L. accessions in long-term storage after more than a decade
    (University of Banja Luka, 2023-11-05)
    Mitrushev, Ivo
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    Spaseva, Brankica
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    Andreevska, Danica
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    Andov, Dobre
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    Gjosheva Kovachevikj Marija
    The purpose of this research was to evaluate the seed viability of 16 Oryza sativa L. accessions including valuable endangered landraces, a breeder’s line, and an advanced/improved cultivar after 13-14 years of long-term storage. Preservation of seed samples has been conducted ex-situ at low temperatures (-18°C). The germination test (germination energy and total germination) was carried out according to ISTA methods and Kameswara (2006). Furthermore, the following variables were examined: the germination index, root length, shoot length, root-to-shoot length ratio, total seedling length, and seed vigour index. The Pearson correlation coefficient was computed to assess the linear relationship between the vigour index and seedling length. All the sixteen accessions have had a high total germination rate, in the range of 89-100%, hence there is no need for their regeneration. The germination energy and total germination showed statistically significant differences for two rice accessions at P-0.05 and P-0.01. The seed showing a high vigour index produced seedlings with higher growth rates. The Pearson correlation of the vigour index and seedling length was found to be very highly positive and statistically significant (r=0.99, p<0.001). Based on the results obtained, it can be concluded that rice as a botanical species retains high seed viability during the long-term conservation, although there are individual differences between the accessions which are due to the genetic constitution of each genotype.
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    THE DEGREE OF INCOME DIVERSIFICATION AMONG RURAL HOUSEHOLDS IN THE POLOG AND PELAGONIA REGIONS OF NORTHMACEDONIA
    (University of Agronomic Sciences and Veterinary Medicine of Bucharest, 2025)
    Gjosheva Kovachevikj Marija
    ;
    Popovska Stojanov Despina
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    Dimitrov, Lazo
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    ANALYZING THE RURAL POVERTY IN THE REPUBLIC OF NORTH MACEDONIA ACROSS DIVERSE INCOME COMPOSITIONS
    (University of East Sarajevo, 2024)
    Gjosheva Kovachevikj Marija
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    Dimitrov, Lazo
    ;
    Popovska Stojanov Despina
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    Economic aspects of honey bee queen breeding: insights from a European study
    (Informa UK Limited, 2024-06-14)
    Dimitrov, Lazo
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    Costa, Cecilia
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    Meixner, Marina D.
    In 2017, the European Commission initiated the EurBeST study to explore the possibilities of using selective breeding of honey bees to increase Varroa resistance traits. One of the specific aims of the study was to assess the process of honey bee queen breeding through an economic analysis. The methodology for calculating the costs of queen production (queen rearing and mating), colony evaluation and expenses for estimating breeding values is based on the Cost of Production (CoP). Cost data were collected via tailor-made questionnaires and interviews performed in five European countries (France, Germany, Greece, Italy, and Poland). The sample population consisted of 20 queen producers and 20 performance testers who participated in the study. The results showed that the average costs for queen production amounted to 22.58 e per queen, ranging from 8.22 e in Poland to 37.30 e in France. The difference between the selling price and the production cost was on average 3.08 e per queen, ranging from 15.86 e in Germany to −12.30 e in France. On average, the colony evaluation costs were 193.40 e per colony. The average cost for breeding value estimation per queen was 8.09 e. Thus, the average total cost per selected queen was 224 e. The selective breeding of honey bees is an efficient way to increase productivity, reduce colony losses, improve bee health and enable profitable operations, but it is expensive, is usually promoted, practiced and implemented by scientists and researchers, and in most cases is financed by external sources.