Antimicrobial activity of preparations from sphagnum peat and sphagnum moss with microelements

The present study is aimed at the development of complex preparations based on sphagnum peat, sphagnum moss and microelements and primary studies of their antimicrobial activity on pure crops of pathogens of agricultural plants in order to determine the possibility of obtaining plant protection products based on them. Microelements are added in the form of salts to the oxidates and hydrolysates of sphagnum moss and sphagnum peat of low decomposition, containing small amounts of humic acids. Their introduction into humate-containing preparations was carried out in the form of metal complexonates. Ethylenediaminetetraacetic acid (EDTA) disodium salt was used as the complexone. The conditions for obtaining zinc, manganese and copper edetate and its introduction into the composition of oxidates have been established. For the preparation of complex preparations, EDTA–Zn₇₀–Mn₅₀–Cu₂₅ was added to the oxidates in a ratio of 1 : 10, and the content of trace elements in the final products was Zn_7.0, Mn_5.0, Cu_2.5. It has been shown that a complex preparation based on magellanicum peat oxidate with a degree of decomposition (R) of 5 % and microelements is active against the phytopathogens Clavibacter michiganensis subsp. michiganensis N.P. and Erwinia amylovora E2, and a preparation based on magellanicum peat with R 20–25% and chelates of microelements – in relation to C. michiganensis subsp. michiganensis N.P. Moss and peat hydrolysates with R 5 % are active against E. amylovora E2 and Pseudomonas corrugata 3′. Thus, it has been established that preparations obtained on the basis of sphagnum peat and sphagnum moss and microelements have activity against a number of phytopathogenic microorganisms and can be used in the development of new generation plant protection products.

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