Fiziol. rast. genet. 2022, vol. 54, no. 4, 328-339, doi: https://doi.org/10.15407/frg2022.04.328

Efficiency of protection against fusariosis and productivity of winter wheat under the influence  composition of fungicides and fertilizers

Sanin O.Yu., Makoveychuk Т.I., Тre­tiakov V.O., Mykhalska L.M.

  • Institute of Plant Physiology and Genetics, National Academy of Sciences of Ukraine  31/17 Vasylkivska St., Kyiv, 03022, Ukraine

The effect on winter wheat plants of the fungicides  cyproconazole (80 g/l) + azoxystrobin (200 g/l) (Amistar extra 280 SC, s.c.) and in the composition with the addition in the flowering phase of nutrients (Bifoliar MicroMax) at different pH levels was investigated in the field experiment. Liquid fertilizer Bifoliar® OPTI pH (pH 2.0), which has the properties of a buffer, was used to acidify the working solution. It was found that the application of the fungicide Amistar extra (pH of the working solution 6.5—7.0) statistically significantly controlled the presence of fusarium head blight in the cenosis. Treatment of plants by a composition of fungicide with nutrients (Bifoliar MicroMax 0.6 l/ha), with the addition of Bifoliar OPTI pH (pH 5.5), reduced the level of fusarium head in crops. Reducing the pH of the solution to 5.5 (Bifoliar OPTI pH) improved the absorption of biologically important nutrients without reducing the levels of protection against winter wheat plant diseases. It was found that the application of the fungicide Amistar extra (pH 6.5—7.0) contributed to the increase in the accumulation of chlorophyll in the flag leaves of wheat plants at the flowering stage by 4.1—4.7 SPAD units. Addition of Bifoliar OPTI pH to fungicides (pH 5.5) increased the chlorophyll content by 10—11 % (4.6—5.2 SPAD units) compared to the control. Foliar treatment of plants with a solution of nutrients Bifoliar MicroMax, 0.6 l/ha alone and with the addition of Bifoliar OPTI pH, and in combination with fungicide Amistar extra, increased chlorophyll content in the flag leaves of winter wheat Podolyanka variety by 4.6—6.3 SPAD units (9.9—13.5 %), and in the Novosmuglyanka variety — by 4.5—6.6 units (9.6—14.0 %) compared to the untreated control. Application of composition Amistar extra+ +Bifoliar MicroMax + Bifoliar OPTI pH (pH 5.5) increased yield of Podolyanka variety by 11.4—17.2 % (7.1—10.7 c/ha), and Novosmuglyanka variety — by 12.9—17.9 % (7.8—10.8 c/ha), compared to control without treatment.

Keywords: Triticum aestivum L., Fusarium spр., fungicides, nutrients, solution pH

Fiziol. rast. genet.
2022, vol. 54, no. 4, 328-339

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