Uman National University | today: 12/25/2025
| Author(s) |
Chukhray R.V., , , Uman National University of Horticulture Воєвода Л. І., , , Марченко К. Ю., , , |
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| Category | The Agronomy | ||
| year | 2025 | issue | Issue 107 part 1 |
| pages | 314-321 | index UDK | 632.7:633.16(477.46) | DOI | 10.32782/2415-8240-2025-107-1-314-321 (Link) |
| Abstract | Hordeum vulgare L. is one of the major cereal crops and plays an important role in ensuring the food security of Ukraine. Achieving consistently high yields requires effective protection of crops from harmful organisms. Among the complex of pests damaging spring barley, Haplothrips tritici Kurd. is of particular importance, as it not only reduces crop productivity but also deteriorates grain quality. The aim of the study was to determine the population density of Haplothrips tritici Kurd. in spring barley crops and to identify the most effective insecticides for its control. Pest counts and observations were carried out according to the standard methodologies applied in plant protection. Adult thrips were recorded during the beginning of barley heading, while larvae were counted at the milk stage of grain development. Haplothrips tritici Kurd. is a dangerous pest of cereal crops, including spring barley, particularly for seed crops. The highest population of adult Haplothrips tritici Kurd. was observed in 2023, which was associated with favorable weather conditions for the pest during the vegetation period of spring barley and averaged 19.0 adults per spike. During the research period (2021–2025) at the experimental field of Uman National University, Haplothrips tritici Kurd. was detected at levels of 5.3–19.0 adults per spike during the stem elongation stage and 7.8–27.5 individuals per spike at the milk ripeness stage. All insecticides effectively controlled the population of Haplothrips tritici Kurd. over a two-week period, although a gradual recovery of thrips numbers occurred due to migration from neighboring fields and the emergence of a new generation from eggs laid before the treatment of the experimental plots. Technical efficacy ranged from 87.4 to 95.1% on the third day after spraying, 80.4–93.4% on the seventh day, and 72.9–86.5% on the fourteenth day. The highest technical efficacy throughout all years of the study was observed in all experimental variants where Decis f-Lux EC was applied at the recommended rate of 0.3 L/ha. | ||
| Key words | phytophagous, plant protection, Haplothrips tritici Kurd., spring barley, insecticides | ||