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Features of yield formation in common bean (Phaseolus vulgaris L.) varieties of different maturity groups under weed control systems

The article presents the results of a study on the effectiveness of weed control systems in common bean crops under the conditions of the Right-Bank Forest-Steppe of Ukraine. The growth, development, and yield formation of common bean varieties belonging to different maturity groups were investigated depending on herbicide application. Field experiments were conducted in 2024–2025 at the experimental site of TDV “Terezyne” (Bila Tserkva district, Kyiv region). The soil of the experimental field was classified as podzolized medium-loamy chernozem. The experiment was two-factorial: factor A included the common bean varieties ‘Apex’ (medium-early) and ‘Bukovynka’ (mid-season), while factor B comprised weed control systems: untreated control, Pulsar Flex at 1.7 L/ha, and Pulsar Flex at 2.0 L/ha applied at growth stages BBCH 13-14. The results showed that herbicide application reduced weed infestation, improved plant growth, promoted the development of a larger leaf area, and increased crop productivity. On average over 2024– 2025, weed control efficiency reached 63–65 % at the rate of 1.7 L/ha and 73–75 % at the rate of 2.0 L/ha. Under herbicide treatment, plant height at the budding and full flowering stages exceeded the control by 5–9 cm. Pulsar Flex had a positive effect on the formation of yield components and thousand-seed weight. The highest grain yield was obtained with Pulsar Flex applied at 2.0 L/ha: on average over two years, it reached 2.66 t/ha for the ‘Apex’ variety and 2.45 t/ha for ‘Bukovynka’, exceeding the control by 20.9 % and 19.5 %, respectively. Herbicide phytotoxicity was short-term and weakly expressed and did not result in a significant decrease in crop productivity. Thus, the application of Pulsar Flex at BBCH stages 13–14 is an effective component of common bean cultivation technology under the conditions of the Right-Bank Forest-Steppe of Ukraine, with the rate of 2.0 L/ha providing the highest agronomic efficiency.

Key words: common bean, variety, weeds, herbicide application, Pulsar Flex, growth and development, yield.

Moroz O. https://orcid.org/0009-0001-3954-0536


Karpuk L. https://orcid.org/0000-0002-5860-5286


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AGROBIOLOGY №1 2026