The article gives information about the results of the experiments, provided to identify efficiency of the insecticide “HELITEC” to control larvae’s of cherry slug (Cаlirоа сеrаsi L.) in laboratory and field conditions. During the experiments, it has recorded 98-100 % efficacy within 3 days at the laboratory, but at the field condition index changed to 80,1-85,0 percent at the seventh day in consumption rate 0,4-0,5 l/ha for each experiment.

The article presents the data obtained on the study of the characteristics of the effect of soil salinity on the transpiration rate of winter wheat varieties. The rate of transpiration was determined at the tuber, flowering and milk-ripening stages of the cultivars. Based on the given results, it was noted that the value of the above indicator varies to different degrees in the section of varieties, depending on the soil salinity and the biological and various characteristics of the varieties.

The article presents the results of studies of various norms of mineral fertilizers, on varieties of spring wheat. Varieties adapted to the soil and climatic conditions of the cultivation zone tolerate adverse weather conditions well. The use of mineral fertilizers on such varieties at optimal rates is a promising direction for stabilizing and increasing yields without any special additional costs.

The article presents the data obtained on the study of the effect of soil salinity on some physiological characteristics of different soybean varieties. A decrease in the rate of transpiration and total water content was found in all varieties under conditions of saline soils. Based on the given results, it was noted that the above indicators change in various degrees in the section of the varieties and are related to the soil salinity and biological and varietal properties of the varieties, as well as the level of tolerance to salt.