INFLUENCE OF SEED DRESSING ON RHIZOSPHERE MICROFLORA OF LEGUMES .1. BIOTIC RELATIONS

In a micro-plot experiment the effect of a six fungicides (Funaben T-s uspended, Funaben T-liquid, Tiprosal, Dithane M-45, Infutox and Oftano l T) used as seed-dressings on the growth of microflora of white lupin e, horse-bean and pea rhizospheres were evaluated. Concentration of al l preparations was similar to that recommended in agriculture. It has been shown that fungicides applied in this study influenced population of bacteria (B), actinomycetes (A) and fungi (F) as well as the quant itative relations among these organisms: (B + A)/F. Such the effect wa s different and depended not only on the kind of preparation but also on the species of plant and the stage of their growth. The most drasti c and the most unprofitable changes have been observed in lupine rhizo sphere after treatment with Tiprosal and liquid Funaben T.