Effect of treatment of common spring wheat crops with supramolecular complexes of tebuconazole on seed quality

The effect of treatment of crops with supramolecular complexes of tebuconazole with plant polysaccharides on the infection and germination of spring wheat grain of a new harvest was studied. The experiment (2018, 2019) was conducted on the crops of varieties Novosibirskaya 31 and Obskaya 2 in the forest-steppe zone of Western Siberia. Crops were treated in the earing phase with tebuconazole mechanocomplexes with licorice root extract (ratio 1: 5, 1:10) and arabinogalactan (1:10) with a flow rate of 0.5 kg/ha. There was a decrease in the development of spike septoria in Novosibirskaya 31 by 97.6-98.5%, in Obskaya 2 by 78.6-98.9%. The biological effectiveness of the application of commercial fungicide Folicur, CE (active ingredient tebuconazole, 250 g/l, consumption rate 1 l/ha) was at a comparable level – 98.5 and 96.8-99.6%, respectively. Tebuconazole complexes with plant polysaccharides proved to be effective in inhibiting black point disease of wheat. Annually, the number of affected wheat caryopses was 1.54 and 1.50 times lower in Novosibirskaya 31 variety and 1.4-1.2 times lower in Obskaya 2 variety in the crops protected by tebuconazole with arabinogalactan compared to the treatment with Folicur, CE. Treatment with mechanocomplexes contributed to the reduction of seed contamination with phytopathogens. Complexes of tebuconazole with licorice root extract and arabinogalactan reduced the rate of infection with helminthosporiasis by 3.8 and 1.7 times (Folicur, CE – 5.5 times). Annually, seed contamination with Fusarium spp. was 8.3 and 3.7 times lower than in the control due to crop protection measures ensured by tebuconazole with arabinogalactan and licorice root extract. In the variants with the use of mechanocomplexes, seed infection with Penicillium spp. decreased. The biological effectiveness of tebuconazole with licorice root extract (1 : 5) was 69.9%, with arabinogalactan (1 : 10) – 58.1%, Folicur, CE – 67.7%. The best germination rate (95.0 and 89%), exceeding that of the standard, was obtained when both wheat varieties were treated with a complex of tebuconazole with licorice root extract (1 : 5). The complexes of tebuconazole with licorice root extract and arabinogalactan created by the mechanochemical method aiming to protect wheat plants from leaf diseases can have a significant healing effect on the emerging grain, improving its sowing qualities

common spring wheat, tebuconazole, licorice root extract, arabinogalactan, mechanocomplex, seed infection and germination

1. Pushkarev V.I., Kuz'min O.G. Otsenka sposobov povysheniya posevnykh kachestv semyan v stepnoi zone Omskoi oblasti [Evaluation of methods of improving sowing qualities of seeds in the steppe zone of the Omsk region]. Vestnik Altaiskogo gosudarstvennogo agrarnogo universiteta [Bulletin of Altai State Agricultural University], 2008, no. 9, pp. 14–23. (In Russian).

2. Igol'nikova L.V., Neimysheva A.N. Posevnye i sortovye kachestva semyan – garant vysokikh urozhaev [Sowing and varietal qualities of seeds is a guarantee of high yields]. Nauchnoagronomicheskii zhurnal [Scientific and Agronomical Journal], 2012, no. 2-1 (92), pp. 47–49. (In Russian).

3. Polunina T.S., Evseeva I.M., Lavrinova V.A. Zavisimost' zarazhennosti semyan yarovoi pshenitsy i effektivnosti fungitsida ot klimaticheskikh faktorov [The dependence of infectious rate of spring wheat seeds and the efficiency of fungicide on climatic factors]. Vestnik TGU [Tomsk State University Journal], 2017, vol. 22, issue. 2, pp. 392–396. DOI: 10.20310/1810-0198-2017-22-2-392-398. (In Russian).

4. Suddenko V.Yu., Kalenskaya S.M. Vliyanie pestitsidov na urozhainost' i posevnye kachestva semyan pshenitsy myagkoi yarovoi [The influence of pesticides on the yield and sowing qualities of soft spring wheat seeds]. Vestnik Ul'yanovskoi gosudarstvennoi sel'skokhozyaistvennoi akademii [Vestnik of Ulyanovsk State Agricultural Academy], 2015, no. 2 (30), pp. 28–33. DOI 10.18286/18164501-2015-2-28-33. (In Russian).

5. Apaeva N.N. Agroekologicheskaya kharakteristika boleznei zerna v zavisimosti ot primeneniya sredstv zashchity rastenii [Agroecological characteristics of grain diseases depending on the use of plant protection products]. Vestnik Mariiskogo gosudarstvennyi universiteta. Seriya: Sel'skokhozyaistvennye nauki. Ekonomicheskie nauki [Vestnik of the Mari State University. Chapter “Agriculture. Economics”], 2015, no. 4 (4), pp. 15–19. (In Russian).

6. Khizhnyak S.V. Chuvstvitel'nost' fitopatogennykh gribov pp. Bipolaris i Fusarium k fungitsidam raznogo khimicheskogo sostava [The sensitivity of phytopathogenic fungi of genera pp. Bipolaris and Fusarium to fungicides of different chemical composition]. Vestnik KrasGAU [The Bulletin of Krasnoyarsk State Agrarian University], 2015, no. 12, pp. 3–10. (In Russian).

7. Grishechkina L.D. Fungitsidy na osnove tebukonazola v bor'be s fuzariozom kolosa khlebnykh zlakov [Tebuconazole-based fungicides in the fight against cereal fusariosis]. Zernovoe khozyaistvo Rossii [Grain Economy of Russia], 2012, no. 4, pp. 59–64. (In Russian).

8. Vlasenko N.G., Teplyakova O.I., Dushkin A.V. Primenenie mekhanokompleksov tebukonazola s polisakharidami rastitel'nogo proiskhozhdeniya dlya zashchity yarovoi pshenitsy ot boleznei list'ev [Application of mechanocomplexes of tebukonazole with vegetable or ganic polysaccharides for protection of spring wheat from leaf diseases]. Sibirskii vestnik sel'skokhozyaistvennoi nauki [Siberian Herald of Agricultural Science], 2019, vol. 49, no. 6, pp. 5–15. DOI: 10.26898/0370-8799-2019-6-1. (In Russian).

9. Khalikov S.S., Dushkin А.V., Davletov R.D., Evseenko V.I. Sozdanie innovatsionnykh fungitsidnykh sredstv na osnove tebukonazola s privlecheniem mekhanokhimicheskikh protsessov [The creation of innovative fungicides based on tebuconazole and mechanochemical processes]. Fundamental'nye issledovaniya [Fundamental Research], 2013, no. 10 (part 12), pp. 26952700. (In Russian).

10. Dushkin A.V., Meteleva E.S., Khomichenko N.N., Vlasenko N.G., Teplyakova O.I., Khalikov M.S., Khalikov S.S. Novyi pestitsidnyi preparat na osnove kompleksov tebukonazola i proizvodnykh glitsirrizina [New pesticide product based on complexes of tebuconazole and glycyrrhizin derivatives]. Uspekhi sovremennogo estestvoznaniya [Advances in Current Natural Sciences]. 2016, no. 11, pp. 296–300. DOI: 10.17513/use36227. (In Russian).

11. Gaponov S.N., Popova V.M., Shutareva G.I., Tsetva N.M., Parshikova T.M., Shchukin S.A. Problema «chernogo zarodysha» i osobennosti tekhnologii vozdelyvaniya yarovoi tverdoi pshenitsy [The problem of the black point disease and features of the technology of cultivation of spring durum wheat]. Agrarnyi vestnik YugoVostoka [Agrarian Bulletin of the South-East], 2016, no. 1-2, pp. 27–28. (In Russian).

12. Tyunin V.A., Shreider E.R. Priroda i znachimost' "chernogo zarodysha" semyan myagkoi yarovoi pshenitsy [The nature and significance of the black point disease of common spring wheat grain]. Sibirskii vestnik sel'skokhozyaistvennoi nauki [Siberian Herald of Agricultural Science], 2010, no. 5 (209), pp. 57–61. (In Russian).

13. Lavrinova V.A. Chernota zarodysha yarovogo yachmenya [Black point at the germ of spring barley]. Zashchita i karantin rastenii [Board of Plant Protection and Quarantine], 2012, no. 11, pp. 20–22. (In Russian).

14. Teplyakov B.I., Teplyakova O.I. Proyavlenie "chernoty zarodysha" na zerne yarovoi myagkoi pshenitsy v usloviyakh raznogo agrofona [Signs of the black point disease on soft spring wheat grain under different agricultural conditions]. Vestnik NGAU [Bulletin of Novosibirsk State Agrarian University], 2011, no. 3 (19), pp. 29–36. (In Russian).

15. Gagkaeva T.Yu., Gavrilova O.P., Levitin M.M., Novozhilov K.V. Fuzarioz zernovykh kul'tur [Fusarium wilt disease of grain crops]. Prilozhenie k zhurnalu «Zashchita i karantin rastenii» [Supplement to the journal “Board of Plant Protection and Quarantine”], 2011, no. 5, pp. 70–112. (In Russian).