It was revealed perspective for further selective work and fast-ripening watermelon's varieties such as "Severnoye siyaniye", "Krimson svit", "Gyuj Bao", "Chernogorets", "Kitaiskaya skorospelka", "Borisfen",  "Kahovsky", Linii No 139", "Kitaj No132-4-1" among the watermelon's sample’s collection under conditions of film hothouses. The watermelon’s plants in the film hothouses are more affected by fusarial fading among the diseases. There were revealed the samples such as "Golopristanskij", "Legin", "Foton", "Fabiola", "Kitaj No132-4-1", "Panoniya No 12-Г', which are relatively resistible to that disease. There were selected the fast - ripening and resistible to diseases new heterodyne hybrids F1 51x62 and F1 53x69 of the Dnepropetrovsk Experimental Research Center EOB under the film hothouse’s conditions.

Colltction of haricot bean has been analyzed for origin and varieties have been classified for their vegetative period duration, saccharide content and yielding capacity.

Scientific approaches to formation of national variety sources of spring and winter barley by State Registration of new varieties and their right protection.

Ability of poly-unsaturated fatty Arachidonic Acid and Micosan bio-fun-gicide with 3% h.c.s.(alkali extract of alkilofraiic glucans mushroom - Fomes fomentarius) to oppress the pathogens' parasitism on the vegetable crops is experimentally proved. There is also studied biological efficacy of fungicides and their tank blends on the cucumber crop.

It is stated that morphological structure of Lucerne root system has significant influence on productivity raising of its overground and root-like substances.

То argue and the paper presents of fundamental positions method for test new varieties millet of distinctness, uniformity and stability to development by results of Institute of Agriculture of UAAS.

Questions of winter wheat cultivation in rice crop rotations, which further to make the most efficient use of soil, increase of fertility and receive an additional yield per unit of crop area are studied in the article. The results of ecological variety test of winter wheat in rice check conditions have represented. The varieties with the best adaptive properties, yield and high qualitative indices of grain are park out. The conclusions about expediency of burther study improvements guestions of winter wheat ecological variety test are made with the purpose of selection varieties the most adapted to specific rice checks contions.

The system of accelerated seed reproduction for new variety of winter wheat Krizhinka, and its application into production during years 1997-2000, are adduced in the article. Application of this system allowed in year 2000 to grow about 20 thousands metric centner of original seeds, and to increase the planted area at the time of including of the variety to State Register of Plant Varieties of Ukraine till 50 thousand he.