Fiziol. rast. genet. 2022, vol. 54, no. 4, 351-364, doi: https://doi.org/10.15407/frg2022.04.351

Features of the interaction of succinate dehydrogenase inhibitors with microelements to increase the winter wheat productivity

Mykhalska L.M., Zozulya O.L., Schwartau V.V.

  1. Institute of Plant Physiology and Genetics, National Academy of Sciences of Ukraine 31/17 Vasylkivska St., Kyiv, 03022,Ukraine
  2. TOV Syngenta Ukraine 120/4 Kozatska St., Kyiv, 03022,Ukraine

Effective disease control integrated with nutrition systems is important for increasing the productivity of winter wheat and other crops. The use of fungicides of the SDHI class with triazoles and strobilurins is today the basis of controlling harmful pathogens in crops. Adepidine of the SDHI class is effective in integrated disease control systems, primarily against Fusarium, Alternaria, powdery mildew, Helminthosporium, spotting, etc. It is shown that the addition of fertilizers containing redox trace elements to the spraying solutions of fungicides is important for prolonging the period of photosynthetic activity, increasing the chlorophyll content in plants, and forming crops that are more resistant to moisture deficit. The latter is important for the formation of productivity in the second half of the growing season of the crop. It is worth applying fungicides with fertilizers in the vegetative period of development to preserve the photosynthetic activity of all wheat leaves lovels, which significantly increases the efficiency of the use of nutrients and prolongs the period of transport of assimilates to the reproductive organ. It is proposed to consider the composition of fungicides with fertilizers, for example, adepidin, 75 g/l + propiconazole, 120 g/l + azoxystrobin, 100 g/l + Brexyl mix, 2.0 kg/ha, as a factor for increasing the efficiency of nitrogen use. It should be noted that it is advisable to control the harmful factor, in particular Fusarium graminearum, etc., with the introduction of integrated protection systems. At the same time, the role of redox trace elements (iron, zinc, manganese, copper) is important both for ensuring high levels of control of the pathogen under the action of fungicides, and for the formation of crops resistant to the effects of stress factors. It was established that the compositions of SDHI + triazole + strobilurin (Miravis Neo) + magnesium + redox-TE (Brexyl Mix) increase resistance to stresses, cause reduction of the peduncle, redistribution of assimilates to the ear (increase in ear length), significant increase in the content of chlorophyll in the lower leaves lovels with a pronounced lengthening of the growing season, which is an important component of increasing the productivity of winter wheat. The established features of the interaction of fungicides and fertilizers are important for the cultivation of crops  under the absence of resources, fertilizers, pesticides, etc.

Keywords: succinate dehydrogenase inhibitors, disease control, nutrition, resistance, grain spike crops, winter wheat

Fiziol. rast. genet.
2022, vol. 54, no. 4, 351-364

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