Improving methods for preventing diseases of pasture grasses and securing the quality of feedstuff

Abstract

The species composition of phytopathogenic fungi isolated from seeds of lawn grasses (pasture ryegrass, shoot grass birch and meadow bluegrass) was revealed and the dominant genera and species were identified. The main components of the pathogenic mycobiota of seeds were fungi: Fusarium – 44 %, Alternaria sp. – 37 %, Penicillium sp. – 12 %, Mycelia sterilia – 5 %, Cladosporium sp. – 2 %. In laboratory conditions, the biological effectiveness of the preparations was evaluated: Strekar, VRK (d.v. phytobacteriomycin + carbendazim), Fitolavin, VRK (d.v. complex of streptotricin antibiotics + phytobacteriomycin), TMTD-plus, KS (d. tiram + immunomodulators), Celest Top, KS (AI thiamethoxam + fludioxonil + diphenoconazole), of which Strekar, VRK, maximally increased the length of ryegrass seedlings, however, the length of the coleoptile was higher in the variant with TMTD-plus, KS, and the best effect on bluegrass seeds was provided by Celest Top, KS and TMTD-plus, KS. The contamination of seeds was reduced after treating with TMTD-plus.