<p>Тhe main factor of growing high-quality crops is the rational use of mineral fertilizers, stimulants and defoliants. It is worth noting that an agrotechnical event as defoliation plays an important role for high-quality harvesting of raw coSon in a short time. In the presence of defoliants, coSon leaves eTectively improve air circulation among the coSon rows, and in the forward direction, sunlight is detected and yield increase by 1.5- 2.0 c/ha due to accelerated ripening. In the following study the mutual inUuence of the components in two water systems has been studied in a wide temperature and concentration range; the formation of a new phase of the compound (С6Н5O7)2Са3∙4H2O, which is identiVed by chemical and physical-chemical methods of analysis has been established. We results of the studied systems show the possibility to obtain a liquid defoliant with physiological activity based on calcium chlorate and ammonium citrate, dimonoetanolamine citrate. We method of obtaining a new defoliant will be used in the chemical industry, as well as the obtained defoliants in agricultural coSon growing. </p>