Harmfulness of fusarium species on soybean depending on a degree of plants affection

A new rating scale in four numbers was developed for assessment of a degree of soybean plants affection caused by Fusarium species in field conditions. Harmfulness of Fusarium on soybean was studied in fields. There was determined the influ-ence of a degree of soybean plants affection by Fusarium on agriculturally valuable traits, especially on number of beans, seeds quantity, seed weight per a plant and 1000 seeds weight. The most prevailing fungus of Fusarium species, caused Fusarium wilt of a soybean, are revealed; they are F. sporotrichiella Bilai, Fusarium oxysporum Schlecht. emend. Snyd. et Hans and F. monili-forme Sheld.