Marchenko A. Features of pathogeny of illnesses of cabbage white-haired earlyripe (Brassica oleracea var. саpitata f. alba) and feedstock after firmness

In the conditions of Right-bank Forest-steppe of Ukraine it is set and specified specific composition, distribution and development of illnesses of cabbage early, the bioenvironmental features of pathogeny are studied and the table of episemes is created for an estimation, selection of feedstock. It is marked, that by dominant illnesses on the plants in the first year, growings were phusarios fading, vascular and mucus backteriosiss, on seeds higher the mentioned backteriosis, alternariosis and phomosis. At the protracted storage of postillates is grey rot and mucus backteriosis. It is set: cross-correlation dependence of distribution and development of the phusarios fading on duration of droughty period (r = 0,73), vascular backteriosis from the temperature of air (r = 0,55) and duration of dewy period (r= 0,55), mucus backteriosis is GDP (r = 0,52). Equalization of index of weather which includes all necessary parameters for development of exciters of F.oxysporum is modified, X.campestris and E.caratovora, a prognosis which allows to set critical days in development of exciter of the phusarios fading and to define the date of appearance of illness is created.It is set: dynamics of distribution of illnesses in obedience to organgenesis and phenophases of development of cabbage early in the first and second year growing; two steps of distribution of illnesses in agritsenosis of two year culture; threshold of harmness of the phusariosis fading within the limits of 6% in phase of inliving of seedlings is curlings of the first sheets in a tube on the plants in the first year growing; but vascular backteriosis and alternaria - 8 - 10%, mucus backteriosis and phomosis - 10 -12% on seeds of cabbage early; dependence of level of infection of seed on development of illness on seeds. Certainly: specific composition of exciters of external and internal seminal infection, a dominant place among which belongs X. campestris 33,1 - 51,3%, Аlt. вrassicae 20,4 - 35,3%. It is set: ways of transmission of exciters of illnesses and value of wreckers in an infectious process; plants-reservers of vascular and mucus backteriosis; critical phases of development of plants of cabbage early of the first (three) and second years (four) growings which friendly to distribution of wreckers and illnesses.