Data from studies in the southern forest-steppe of the Omsk region on meadow-chernozem medium-deep low-humus medium-loamy soil for 2021-2023 are presented to determine the optimal period of treatment with the herbicide Puma Plus at a rate of 1.4 l/ha for emmer crops of the Runo variety. Working fluid consumption 200 l/ha. Sowing time is the first ten days of May. The experiment was repeated five times, the plot area was 60 m 2 . The predecessor was spring wheat in black fallow without herbicide treatment. Three treatment periods were tested: when 2-3 emmer leaves are formed, during tillering and when 2-3 nodes are formed on the emmer stems. In 2021 and 2022 the optimal processing period was the tillering phase. The proportion of weeds was minimal against the unfertilized background - 3.54-3.57% and against the background of ammophos (N12P52) added during sowing - 4.13-4.54%. Accordingly, the maximum grain yield was formed here - 2.55-2.57 and 2.67-2.69 t/ha. A peculiar situation has emerged in 2023. After heavy rainfall a week after the last treatment period, the share of weeds here was 13.28-14.16%, mainly due to white pigweed and acorn grass. With earlier treatment, the proportion of weeds exceeded 20%. As a result, grain yield here was 0.90-0.91 and 1.24-1.26 t/ha. Under normal weather conditions for the zone, the best option was to treat the crops with a herbicide during the emmer tillering phase. All years of experience, there was an increase in weediness of crops against the background of pre-sowing application of ammophos, which was not always compensated by an increase in spelled grain yield.
emmer, period of herbicide treatment, proportion of weeds in the agrophytocenosis, grain yield
1. Borovik A.N., Akulov N.S. Sort pshenicy polby yarovoy (T. dicoccum Schrank) Runo // V s'ezd Vavilovskogo obschestva genetikov i selekcionerov, posvyasch. 200-letiyu so dnya rozhdeniya Charl'za Darvina. M., 2009. S. 190-195.
2. Tyunin V.A., Shreyder E.P., Bondarenko N.P. Cennaya zernovaya kul'tura polba // APK Rossii. 2017. T.24. № 3. S.649-654. EDN: https://elibrary.ru/ZXNBSJ
3. Hmeleva E.V., Korolev D.N., Pen'kov Yu.V. Izuchenie pokazateley kachestva zerna polby i razrabotka sposoba proizvodstva hleba na ego osnove // Proizvodstvo i pererabotka sel'skohozyaystvennoy produkcii: materialy IV Mezhdunar. nauch.-prakt. konf. Voronezh, 2016. S. 174-178. EDN: https://elibrary.ru/WOEQPX
4. Urozhaynost' polby i tehnologicheskie kachestva zerna v zavisimosti ot priemov vozdelyvaniya / S.D. Gilev [i dr.] // Agrarnyy vestnik Urala. 2017. № 5(159). S.12-16. EDN: https://elibrary.ru/ZHDASB
5. Opredelenie optimal'noy normy vyseva polby v yuzhnoy lesostepi Omskoy oblasti / R.V. Topeha [i dr.] // Innovacionnye resheniya i trendy razvitiya tehnologiy produktov zdorovogo pitaniya: materialy Mezhdunar. nauch.-prakt. konf., posvyasch. 80-letiyu Zasluzhennogo rabotnika vysshey shkoly RF, deystvitel'nogo chlena RAE, doktora med. nauk, prof. Vysokogorskogo Valeriya Evgen'evicha. Omsk, 2022. S. 81-84. EDN: https://elibrary.ru/GBBXIC
6. Smutnev P.A., Markova I.N. Perspektivy sozdaniya sortov yarovoy polby dlya zasushlivyh usloviy Nizhnego Povolzh'ya na osnove ispol'zovaniya mirovoy kollekcii VNIIR im. N.I. Vavilova // Nauchno-agronomicheskiy zhurnal. 2019. № 1(104). S. 45-48. EDN: https://elibrary.ru/FNBJGW
7. Zelenev A.V., Smutnev P.A., Markova I.N. Sozdanie perspektivnyh sortov yarovoy polby v Nizhnem Povolzh'e // Izvestiya Nizhnevolzhskogo agrouniversitetskogo kompleksa: Nauka i vysshee professional'noe obrazovanie. 2019. № 2(54). S. 82-89. DOI:https://doi.org/10.32786/2071-9485-2019-02-9 EDN: https://elibrary.ru/TPMATJ
8. Effektivnost' sredstv himizacii na posevah polby / R.V. Topeha, N.A. Rendov, E.V. Nekrasova [i dr.] // Itogi i perspektivy razvitiya Sibirskogo zemledeliya: Materialy Vseros. (nac.) nauch.-prakt. konf. s mezhdunarodnym uchastiem, posvyaschennoy 105-letiyu agronomicheskogo (agrotehnologicheskogo) fakul'teta i 75-letiyu doktora sel'skohozyaystvennyh nauk, prof. Rendova Nikolaya Aleksandrovicha. Omsk, 2023. S. 158-160. EDN: https://elibrary.ru/PHLYWT
9. Formirovanie steblestoya, rost kornevoy sistemy i urozhaynost' agrocenoza polby (Triticum dicoccum Schrank) v zavisimosti ot agrotehnologicheskih priemov vozdelyvaniya / F.Sh. Shayhutdinov, I.M. Serzhanov, D.K. Zinnatullin [i dr.] // Dostizheniya nauki i tehniki APK. 2019. T. 33. № 5. S. 21-25. DOI:https://doi.org/10.24411/0235-2451-2019-10505 EDN: https://elibrary.ru/SXBNRA
10. Vliyanie priemov agrotehniki na urozhay i kachestvo zerna pshenicy polby (dvuzernyanka) v usloviyah Predkam'ya Respubliki Tatarstan / F.Sh. Shayhutdinov [i dr] // Vestnik Kazanskogo gosudarstvennogo agrarnogo universiteta. 2018. T. 13. № 4(51). S. 103-108. 10.12737/ article_5c3de390ad4cc9.57672413. DOI:https://doi.org/10.12737/article_5c3de390ad4cc9.57672413 EDN: https://elibrary.ru/PNXXYB
11. Haliano M., De Pasguale A. I faro: nuove acguisizioni unambito pseventino e terapeutico // In Atti del Covego "I faro, un cerealedella Salute", Poterza. Bari. Italy, 1994. P. 67-81.
