The organizational and technological factors of agrarian production of the republic are considered, the regulation and effective management of which allow without the significant financial expenses to improve essentially the structure of fodder production, increase the efficiency of livestock production and, on this basis, to strengthen the economy of agricultural organizations.

   Effect of weather conditions, hybrid early ripeness and grain consistency, laboratory germination and fungicide seed treaters on the emergence degree under field conditions is shown on the basis of multi-year researches (2005–2017). It has been established that the seeds of early ripening hybrids with high sown conditions and flint kernel type as well as favourable temperature year conditions provided the smallest difference between laboratory and field germination. Maxim XL was the most efficient seed treater when used under the conditions of long-term low temperatures in the preemergence period (less than 10 °С).

   The article presents the results of a stationary experiment on studying the effect of soddy-podzolic light loamy soil degree of cultivation by agrochemical properties and the level of fertilizers used for protein content and production of spiked cereals, perennial legumes (clover, alfalfa) and cereal grasses cultivated in the universal grain-grass tilling and specialized rotations.

   There was researched the influence of abiotic factors on the development of brown leaf spot, piriculariose and root rot. It was found that the sharp fluctuations of temperature and rainfall determined the state of stress of proso millet and, consequently, increased the susceptibility of pathogens for destruction. For results there was conducted of correlation and regression analysis and there was found that the level of HTC influences on the development of brown leaf spot, piriculariose and root rot. It was found a close exponential connection between the HTC and the development of brown leaf spot. Dependence of pirykulariose and root rot of this indicator is better described by a quadratic function.

   Article presents the results of studies of photosynthetic activity of Siberian millet crops depending on the seeding rate, the method of sowing and the introduction of mineral nitrogen in the conditions of the southwestern part of the republic. It is established that when cultivating Siberian millet for grain, the most optimal conditions for photosynthetic activity are created by using a broad-row sowing with a seeding rate of 1,5 million grains per 1 ha against a background of Nitrogen (60 kg / ha). In this case, the growth of the leaf surface quickly reaches a value close to the optimal level, and remains in the maximum functional state until the harvest period.

   A high agronomic efficiency deposing making and foliar nutrition of barley crops complex fertilizers and growth regulators. The highest grain yield of barley (6,96 t/ha) was observed in variant N₈₀ P₇₀ K₁₂₀+N_{40 карб.} + Microstim–Copper L. The maximum content of crude protein (12,9 %) and its yield (8.0 q/ha) was in the variant with application of Microstim–Copper L on the background of the N₈₀P₇₀ K₁₂₀ + N_{40 carb}.In the same embodiment, the highest were such indicators as the nature of the grain (566,4 g/dm³) and weight of 1000 grains (66,0 g).

   Breeding for shortness as a promising way of doing the selection process of winter rye is detailed. The cause of the positive a correlation between the height of the plant culture and their performance is noted. The forms of the short rye 8–4, 243–1 and 246–1 of the dominant gene of shortsteam Hl are isolated and tested. A comparative description of the main indicators fenotype with a grade-standard of a variety «Khlibne» is done. The feasibility of their use in breeding research as donors and some shortness of agronomic characters is indicated.

   The article presents the results of evaluating the numbers of red clover in the control nursery. A total of 45 numbers were studied, referring to five types of ripeness: early ripening, middleripening, mid-ripening, mid-late and late-ripening. According to the evaluation results, in each ripening group the best numbers are selected, combining a set of economically useful attributes and properties.

   The results of fodder beans seed infection by the disease agents complex causing alternariosis (Alternaria spp.), fusariosis (Fusarium spp.) and seed moulding (Penicillium spp., Mucor spp., Rhizopus spp.) are presented in the article. The evaluation of the perspective seed dressers for the crop protection against the pathogens is given. More stable disinfection effect has been brought by the seed dressers Scarlet, OE (imazalil, 100 g/l + tebuconazole, 60 g/l) 0,4 l/t and Maxim forte, SC (asoxystrobin, 10 g/l + tebuconazole, 15 g/l + fludioxonyl, 25 g/l) – 1,5 l/t in seed infection decrease by the fungi of the genus Alternaria and Fusarium.

   The article presents the results of herbicide Magnum, WDG biological effectiveness studies for cow parsnip sosnowski control, depending on the application rate of the preparation, and also the effectiveness on other components of plant phytocenosis. Depending on the application rate of the preparation cow parsnip sosnowski’s fresh vegetative weight decreased at the rate of 20–30 g/ha for 80,2–87,5 %, at the rate of 40–50 g/ha for 92,2–94,9 %, at the rate of 100–300 g/ha for 97,7–98,8 %. A year after the herbicide Magnum, EDC (100–300 g/ha) application there was the active overgrowing by grass species (cock’sfoot (Dactylis glomerata L.), timothy grass (Phleum pratense L.) for 33,2–67,8 %.

   Experimental data suggest that cercospora leaf spot on Calendula officinalis L. should be attributed to major diseases. Reduced assimilation leaf surface by browning and death of the affected tissue resulted in lower plant productivity. The higher was the degree of damage of plants, the greater was the decrease in productivity – from 12 % for low till 76 % for severe disease development. Based on this, it should bi necessary to develop protective and preventive measures to reduce crop losses of raw medicinal marigold due to cercospora leaf spot. The coefficient of harmfulness Cercospora calendulae Sacc. from 0,5 to 1,28 in dependence from degree lesions leaves.

   It was found that the reservations of Pyrenophora tritici repentis (Died.) Drechsler can be annual bluegrass, bulbous bluegrass, wild oat, fool hay, red millet, barnyard grass, setaria pumila, setaria viridis, field bromegrass, rye bromegrass according to the studies conducted in 2009–2011 in terms of Uman National University of Horticulture (Right Bank of the Forest-Steppe of Ukraine). Single fungal fruit of P. tritici repentis (Died.) Drechsler were found on the stems of wild oat. It was confirmed that most commonly perithecia of pathogen of pyrenophora tritici repentis were found on perennial rhizomatous of grasses of wild plants of Poaceae family, in particular, on agropyron repens, as well as – on juvenile wintering wild plants in this family. Ephemerae were affected slightly. It was determined that fungus P. tritici repentis (Died.) Drechsler in adjoint pathologic process developed intensively on the leaves grown again of those plants of setaria which were inoculating by wheat streak mosaic virus (WSMV) and there were observed yellow-green texturized stripes running along the leaf veins. Intensity of the development of pathogen of pyrenophora tritici repentis decreased sharply on the leaves grown again of setaria inoculated by WSMV where strips became whitishand lamina had a parchment view.

   In the article the data on symptomatics and perennial dynamics of anthracnose incidence in cherry plantations are presented. It is determined that in years of researches the disease incidence has made 1,0–60,0%.Cherry fruits severity by anthracnose is increased with the crop age. It is discovered that the determining weather factors in the anthracnose epiphytoty severity are: excess rainfall, high relative air humidity and June moderate temperature regime.

   The research results on the evaluation of the efficiency of such retardants as Moddus EC, Terpal, Messidor EC, and Seron on spring barley var. Honar in phytotron are presented in the article. It is shown that in the absence of environmental factors, the retardants influence on internode linear growth and barley plant productivity on a case by case basis. The positive response of Honar variety to Moddus retardant was recorded.

   The research on the influence of the form of green fertilizers on productivity and biochemical composition of beet root crops on pesticide background and background without pesticide. The highest yield obtained with the introduction of green manure lupine stubble culture. High biochemical parameters revealed in growing beet without pesticides.