Influence of a finely dispersed suspension based on a metal/carbon nanocomposite of copper on growth processes and seeds infection of spring wheat

Abstract

Abstract The article presents the results of laboratory studies on the treatment of spring wheat seeds of the Svecha variety with a fine suspension based on a metal/carbon nanocomposite of copper (MeC NC Cu). The aim of the research is to identify the fungicidal action and stimulate the growth processes of plants at the initial stage of organogenesis. The experimental results showed that the effect of copper nanocomposite on plants is ambiguous and in some cases contradictory. This nanomaterial at a concentration of 0.1% had a toxic effect on the seeds of Triticum aestivum. The drug at a concentration of 0.005% (by 15.7%) had a weak stimulating, but insignificant, effect on root development. It was revealed that an increase in the concentration of MeC NC Cu has an inhibitory effect on plants: the immune system weakens and the resistance to pathogens of seed infection decreases. Development of Bipolaris sorokiniana Syn. increases by 2.90-3.31%, Alternaria sp. - by 1.94%. With an increase in the concentration of NC to 1.00%, the indicators deteriorate in comparison with the control to 3.06%. Infection of seeds with a fungus of the genus Fusarium was observed in the following variants: MeC NC Cu 0.05% by 54.5%, MeC NC Cu 1.0% by 6.90% with the least significant difference (95%) 1.36. Other fungi are noted in descending order; the degree of damage varied from 4.65% to 7.83% with an increase in the concentration of MeC NC Cu (the least significant difference (95%) = 0.67).