Abstract
Studies have shown that during the vegetation period, the active colonization of root systems of forage crops (spring barley, peas, spring rape) was carried out due to the phytopathogenic micro-myccetes of the genus Fusarium Link: their abundance was from 6.1 to 49.7%. The most common species causing root rot were F. culmorum, F. heterosporum, F. oxysporum, F. solani, F. sporotrichiella. In addition, Bipolaris sorokiniana parasitized on the roots of spring barley with abundance of 6.5%, and on the roots of spring rape - fungi p. Alternaria is 26.9 %. The development of root rot on spring barley and peas increased 2-3 times with the aging of plants and by the time of harvest was 23.2% and 53.4%, respectively. Rapeseed was affected by fusarium aetiology - root rot and tracheomycosis (Fusariasis). Fusarium lesion was observed throughout the whole vegetation period and did not exceed 12.7%; the root rot development index was 17.5%.
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