Fungicidal and growth-stimulating effect of microbial preparations on hop plants yield

Abstract

O. V. Venger, M. M. Kliuchevych, S. H. Stoliar, O. O. Strygun, S. M. Vygera, I. P. Shtanko, O. M. Honcharenko

Cultivation of plant products using organic technology is becoming widespread. In our opinion, the technology of protection of hops from pests should be improved. The harmful effect of pests, diseases, and weeds should be limited by biological factors. Favorable phytosanitary conditions of agrocoenoses of hops plantations should be achieved using agrotechnical, biological, chemical, and other methods that require thorough study. The developed system of protection of hops against root rot is based on biological features of mycoses, the introduction of varieties with the lowest degree of affection by pathogens of fungal etiology, application of optimal tillage and fertilization systems, terms of pesticide treatments, and technological operations of plant care and plant growth, rational use of effective mixtures of biological preparations and plant growth regulators. Environmentally friendly protection of hops against root rot involves complex treatment of the main rhizome with one of the biological preparations after spring pruning. The possible preparations are Mikosan N, liquid (10.0 l/ha); Avatar Zakhyst, liquid (2.0 l/ha); Psevdobakteryn-2, liquid (3.0 l/ha); Agat 25-K (100 g per 10 liters of water), or Khetomic, powder (40 g per 10 liters of water) together with the sodium salt of carboxymethylcellulose (NaCMC) in the amount of 200 g per 10 liters of suspension. The preparations are applied by watering the parent of hops or adding dry crystals of superabsorbent Teravet T-400 to the pits with an application rate of 7.5 g per rhizome. The proposed measures make it possible to maintain the yield of hops cones at the level of 0.08–0.25 t/ha, or 10–30%, increase the content of alpha-acids, and increase the content of alpha-acids and increase alpha acid content by 0.2–0.3%.

Keywords: pathogens of hops root diseases, biological preparations, protection system
 

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