Uman National University | today: 12/25/2025
| Author(s) | Lubych V.V., Candidate of Agricultural Science, Lecturer of Department of Technology of Storage and Processing of Grain, Uman National University of Horticulture, Ukraine | ||
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| Category | The Agronomy | ||
| year | 2025 | issue | Issue 107 part 1 |
| pages | 366-390 | index UDK | 632.7:633.111):631.816 | DOI | 10.32782/2415-8240-2025-107-1-366-390 (Link) |
| Abstract | Purpose. To determine the dynamics of the population formation of the sunn pest in winter common wheat crops depending on fertilization. Methods. Field, measurement, calculation-comparative, analytical, statistical. Results. Among the cereal bugs, the most harmful in winter wheat crops is the sunn pest. In recent years, to improve the integrated protection system of winter wheat, many studies have focused on chemical control methods, whereas little attention has been given to the role of fertilizers. The infestation of winter wheat crops by the sunn pest depends on weather conditions during the vegetation period, crop growth and development stages, rates of mineral fertilizers, and insecticide application. The lowest pest density is recorded at the stem-elongation, heading, and flowering stages. At the milk-ripeness stage, its density reaches 1.90–1.99 ind./m²; at the dough stage – 2.0–2.21 ind./m²; and at full ripeness – 2.21–2.26 ind./m², with the economic threshold of harmfulness at this stage being 1–6 ind./m² depending on fertilizer rate. In 2022, the number of adults was lower, though the same trend persisted. The population of the sunn pest in winter wheat decreased under the application of the insecticide Actara 240 SC, SC: in 2021, its density was 0.3–0.4 ind./m², and in 2022 – 0.5–0.6 ind./m² depending on fertilizer rate. Conclusions. The average winter wheat yield over three years without protection was 5.41–7.41 t/ha, and with protection – 5.62–7.61 t/ha depending on the treatment; the yield increase from fungicide application amounted to 0.17–0.23 t/ha. Over two years, grain protein content without protection increased from 12.5% (no fertilizer) to 14.9% depending on the treatment. Under insecticide application, protein content increased from 13.1% to 15.4%. Gluten quality improved from the third to the second quality group. | ||
| Key words | sunn pest, winter common wheat, insecticide, damage, yield, grain quality, insecticide efficiency | ||