Эффективность комплексов Новохизоля при защите посевов яровой пшеницы в лесостепи Приобья

Abstract

The effectiveness of twofold treatment of spring wheat with Novochizol complexes supplemented either with copper ions [Novochizol + Cu2+] or with copper ions and Chitosan [Novochizol + Cu2+ + Chitosan] was assessed. Field experiments were carried out on leached chernozem of the forest steppe of the Ob region of the Novosibirsk Province. Under conditions of moisture deficiency in 2022–2023, concurrent with a moderate level of Septoria disease development, the treatment with both complexes was ineffective. In the case of a high level of disease development, the effectiveness of the [Novochizol + Cu2+] complex reached 46 %, which is 1.5 times lower than the effect of crop protection using the standard chemical fungicide Titul Duo. The complexes under investigation showed practically no protective effect against powdery mildew, including the cases of its high prevalence, whereas the Duo Title reduced the development of the disease by 85 %. The crop treatment with Novochizol complexes displayed a growth-stimulating effect on the quality of wheat plants. In particular, the biomass accumulation increased 1.3–1.5 times, plant height increased by 15–16 %, flag leaf area increased by 16–17 %, productive bushiness increased by 3–9 %, and ear structure improved by 17–30 %. The crop treatment with [Novochizol + Cu2] or [Novochizol + Cu2+ + Chitosan] complexes allowed for an additional yield of 0.3 t/ha, while the use of the Title Duo provided 0.4 t/ha yield gain.