Annual agrophytotsenozs on a basis of fodder grades of barley and bean cultures with having sat down of annual rigrass have provided productivity of green weight for 3 hay crops from 40,2 till 59,8 t/ha. The greatest gathering of exchange energy is received from productivity of green weight (12300 megajoule from ha) and gathering of a digested protein (9 centner from ha) at crops summer vika with barley and annual rigrass at entering of mineral nitrogen into 2 receptions (N₄₅ +N₆₀).

   The article presents the results of studies evaluating the effectiveness of cultivation of sugar beet using a mulch of straw and oil radish. The absence of differences in the productivity of sugar beet sowing in mulch of oil radish and traditional technology of cultivation of sugar beet and mulch advantage of oil radish with minimum tillage. It is proved that the optimal dose of nitrogen is N 90-120 . Application of manure under the previous culture when plowing straw under beet is inappropriate, and with minimal processing allows sugar per hectare yield growth.

   Study of phytosanitary status of grapes plants were carried out for the first time in Belarus in the cultivars collection of the department of selection of fruit plants of the "Institute for Fruit Growing". The detection of the grapes contamination by pathogenic viruses was carried out by ELISA-test during 2013 – 2015. Occurrence of 10 viruses at 1 350 plants of grapes (2 700 tests) was investigated. For the first time in Belarus virus diseases of grapes were revealed: Grapevine fleck virus (GFkV) and Grapevine leafroll-associated virus 3.

   The results of studies on the effectiveness of a combined fungicide Aliot, used for processing of flax in the phase of the “tree” and budding at the dose of 0,4 l/ha. The biological efficacy of the drug for the protection of plants against anthracnose was 32,8–55,2 %, septoria – 33,3–71,2 %, fusarium – 66,7–80,5 %. Increase of seed yields of 1,2 t/ha, the trusts to 3,3 kg/ha, the fibers by 2,5 t/ha, including long by 2,1 t/ha.

   The results of researches during many years about features of life strategies of dominant phytophages of grain stocks of spiked and pulse cultures on axis of r and K-continuum were introduced. The species of order Coleoptera exposed predominantly K-selection, which characterized their expressed status of phytophages, the high adaptive capacity to action of stress factors and the modifying role of entomophages was determined. Lepidoptera and other species of arthropods show the expressed r-strategy, opportunistic character of ontogenesis and susceptibility to entomophages. The perspectives of control of quantity of population of phytophages, using laboratory cultures of entomophages was shown.

   Modes of fumigation against major pests of grain stocks. The necessary rules lethal phosphine fumigation against the most
common pests of grain stocks. Determined insect fumigant sensitivity depending on their species composition.

   The prolonged usage of herbicides with the same mechanism of action reduces the effectiveness of the drug and the system altogether. The results of the research confirmed the presence on the rice fields of Ukraine manifold populations of the barnyard grass (Echinochloa crus-galli L.), that are not sensitive to the action of herbicides, inhibitors of acetolactate synthase (ALS). Nowadays, the problem of resistance on sowings of agricultural crops is very acute. Therefore, its main causes were thoroughly investigated and actions aimed at the prevention of it were put forward.

   Results of researches on use of regulators of growth at cultivation of vegetable cultures are presented. It is established that processing of plants regulators of growth of Rostmoment, VG on vegetable cultures in the recommended norms positive impact on productivity and quality indicators of vegetable production. The highest productivity of carrots is received when processing plants in a dose of 3,0 kg/hа, garlic winter – it is normal of 2,0 kg/hа.

   Research results of the evaluation of economic efficiency of herbicide and growth regulator application on sugar beet crops are presented in the article. It was established that Betanal MaxxPro had a small advantage in pure income and profitability over the mixture of Betanal Maxx and Goltix when there were not high quantity of weed plants tolerant to des- and phenmedipham herbicides. Combined use of the herbicides and growth regulators was economically feasible only in the years with unfavourable weather conditions in the periods of chemical weeding. The highest effect in that case was achieved by the double combined application of the herbicides and Fertigrain Foliar growth regulator.