Under the yield of 2018, in the Republic 1314,5 ths. ha of winter grain crops have been sown including 1314,5 – for grain and 196,5 – green fodder. In the structure of winter grain crops 289,9 (21,6 %) are under rye, wheat - 533, triticale – 485,0 (36,9 %), winter barley – 11,7 ths. ha (0,9 %). Timely and qualitative care after crops in accordance with the scientific recommendations largely determines the fate and quality of the future yield.

In the article the results of researches on retardants Terpal, Seron, Messidor, Calma efficiency on three spring barley varieties Honar, Magutny and Fest are presented. Their influence on logging resistance and productivity is shown depending on the crop varietal peculiarities.

The production of grain, rape, sugar beet, vegetables and milk is effective in Grodno region. The production of fruits, flax fiber and growth of body weight of cattle is unprofitable.

It was studied the influence of planting tubers weight, nutrition area and application rates of fertilizers on the assimilative surface value and yields of different potatoes varieties in the conditions of Ukrainian Forest-Steppe.
The obtained results indicate that a more intense planting of potatoes (70 x 20 cm) increased the yield compared to 70 x 50 cm in the planting scheme. The investigated potato varieties were reacted to a great extent by the application of organic and mineral fertilizers. It has been found that utilization of 81–120 g planting tubers weight increase the potato yield by 23 to 32 %, in comparison with tubers mass 25–50 g.

The article contains the results of studies of the influence of boric, copper and manganese microfertilizers on productivity, oil content, collection of oil from an unit area, content and removal of trace elements in the cultivation of sunflower on Luvisol loamy sand soil.

The article gives an assessment of the economic effectiveness of microfertilizers in the cultivation of sunflower on Luvisol loamy sand soil. Doses and the optimal combination of microelements have been determined, which ensure high net income and profitability of cultivation of sunflower.

The article presents the results of studies (2016–2017) of the effect of calcium-containing fertilizers on the yield, average size and biochemical parameters of the quality of apple fruit in a fruit-bearing garden of intensive type when cultivated on sod-podzolic soils.

As a result of studying of influence of zinc fertilizers against the background of the recommended doses of macrofertilizers for a white cabbage and green cultures the most optimum levels of content of nitrate nitrogen in heads of cabbage of a white cabbage, in parsley leaves, in heads of cabbage of salad and in coriander leaves on cespitose and podsolic sandy loam soils are revealed.

The results of researches carried out in 2016–2017 have shown a high biological efficiency of the herbicide Extracorn, SE in fruit seed plantations. In 30 days after treatment weed vegetation number has decreased in 2016 for 97,1 %, raw weight – for 98,5 %. The preparation has got a prolonged action even in 60 days after the herbicide application the space at orchard stems has been free of weeds (the biological efficiency 92,9 %).

The results of 2016–2017 researches on blue lupine seed treatment by preparations Gaucho 70 WS w. p. and Biocomplex BTU on germination and production and also plant damage by knot weevils are stated. It is determined that by pre-sowing blue lupine seed treatment by the insecticide Gaucho 70 WS w. p. at the rate of application 2,0 kg/t the seed germination has made from 94,8 to 94,3 %, at the rate of application 2,5 kg/t – 97,0–89,5 %. In the control this index has made 77,1–69,8 %.

The effects of post-emergence herbicides Task Extra 66.5, Titus Extra 75, Stellar on weediness and grain corn yield in the Eastern Forest-Steppe of Ukraine are described. It was established that in order to effectively control a wide range of weeds in corn crops application of Task Extra 66,5 (440 g/ha) + SAA Trend 90 (0,2 l/ha), which under extreme weather conditions reduced the total weight of weeds by 75,8 % and provided the yield gain of 2,36 t/ha or by 92,9 %, was the most expedient.

The efficiency of phytosanitary measures with the use of targeted fungicides during vegetation and their influence on carrot roots storage ability during autumn-winter storage is determined. It is determined that the carried out protective measures have promoted carrot roots affection decrease by diseases and the output of marketable healthy production after 6 months of storage up to 92,0 % (Bellis, WDG), 95,0 (Luna Experience, SC) and 4,0 % (control).

To decrease ascochytosis severity testing has been done and the regulations of fungicides application have been developed in protected ground cucumber plantings. Based on the results of the obtained data it is determined that after two times of Cydeli Top 140, DK application at the rate of 1,0 l/ha, its biological efficiency has been higher than the wide-used fungicide Switch, WDG (1,0 kg/ha) and has made during winter-spring crop rotation 65,3 %, during summer-autumn – 56,2 %, what has given the opportunity to keep 16,7 and 12,5 % of yield, accordingly.

Data on taxonomic spider structure on the fields of winter rape before and after pesticides are listed. We estimated the species composition of spiders on the winter rape fields. Our data on the structure of species composition allow to optimize the use of protect means on the winter rape fields.

The article presents the results of the clonal pear rootstocksstudies. A new S1 (Cydonia oblonga) rootstock is derived. The growth force of the grafted varieties is semi-dwarfish. The rootstock is compatible with varieties of Belarusian breeding, and provides the productivity of grafted pear varieties in the second year after planting in the garden.