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Plant production Âñòóï Áóðÿêè öóêðîâ³ çäàòí³ ôîðìóâàòè âèñîê³ ïîêàçíèêè ïîòåíö³éíî¿ âðîaeàéíîñò³ â ðàç³ çàñòîñóâàííÿ ñó÷àñíèõ òåõíîëîã³é âèðîùóâàííÿ òà âïðîâàäaeåííÿ ó âèðîáíèöòâî âèñîêîïðîäóêòèâíèõ ã³áðèä³â. Çîêðåìà, ó ͳ-ìå÷÷èí³ òà Ôðàíö³¿ ðåàëüíî îòðèìóâàòè âðîaeàéí³ñòü íà ð³âí³ 110-150 ò/ãà, à â Óêðà¿-í³-90-110 ò/ãà [1, 2]. Îäíàê, ó ñåðåäíüîìó ïî Óêðà¿í³ çà 2019 ð³ê óðîaeàéí³ñòü êîðåíåïëî-ä³â áóðÿê³â öóêðîâèõ áóëà íà ð³âí³ 46,1 ò/ãà, ùî á³ëüø í³ae óäâ³÷³ ìåíøå â³ä ïîòåíö³éíèõ ìîaeëèâîñòåé êóëüòóðè [3]. Íå îñòàííþ ðîëü â îáìåaeåíí³ âèñîêîãî ð³âíÿ ïðîäóêòèâíîñò³ áóðÿê³â öóêðîâèõ â³-ä³ãðàþòü ÷èííèêè óìîâ âèðîùóâàííÿ: òåìïåðàòóðà ïîâ³òðÿ òà ´ðóíòó, ê³ëüê³ñòü îïà-ä³â, íàÿâí³ñòü äîñòóïíî¿ âîëîãè â ´ðóíò³,

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Aim. To determine the quality of diterpene glycoside powders, produced in Ukraine using the stevia leaves of plants of domestic and foreign origin. Methods. Differential scanning calorimetry and thermographic analy- sis. Results. It was demonstrated that the increase in the production of powders of diterpene glycosides in the world results in stepping up the requirements to the selection material of stevia and the quality of powders, obtained from its leaves as a fi nal product. The quality of diterpene glycoside powders, produced in Ukraine us- ing the stevia leaves of plants of domestic and foreign origin, was investigated. Conclusions. It was determined that special attention in the analysis of the powder samples of diterpene glycosides should be paid to the sample preparation: increased humidity of the sample promotes a weakening of carbohydrate bonds and rapid decline in their quality. Differential scanning calorimetry allows determining the content of additives, the degree of moisture saturation, and may further be used in the screening of selection samples and forecasting the shelf life of powders of diterpene glycosides.