An ideal pesticide should be toxic only to the target organism and biodegradable, and its residue should not affect nontarget surfaces (Chowdhury et al., 2008). One such ideal alternative is the use of natural plant products that have pesticidal activity, such as azadirachtin (Akça et al., 2005). Azadirachtin possesses insecticidal activity against many economically important insect pests such as Helicoverpa armigera, Spodoptera litura, Plutella xylostella, Sitophilus oryzae, Sitophilus zeamis, Earis vitella, Aphis gossypii, Bemicia tabaci, and Pectiniphora gossypiella, and nematodes like Cosmopilitis sordidus. The belief that such natural insecticides are safe or less damaging to the ecosystem also needs to be further validated, as their effect on nontarget organisms is reportedly very close to threshold chronic toxicity (Schmutterer and Singh, 2002;Gopal et al., 2007).

Relevance. Jerusalem artichoke is a culture that has recently received a lot of attention. It is used to prepare highly effective medicines, fruit and vegetable drinks and purees, and is also used in cooking. The issue of preserving Jerusalem artichoke tubers as a raw material source, a promising direction in the technology of functional products. The purpose of the research is to determine the influence of temperature storage regimes on the preservation of consumer qualities of Jerusalem artichoke tubers.Materials and methods. The object of research is Jerusalem artichoke tubers (Helianthus tuberosus L.). Plants were grown in the Perm region of the Perm kray. Tubers before being stored were sorted, washed, dried and placed in polymer bags. The test samples were stored at three temperature regime: -22…-18°C, 0…4 and 18…22°C for 3 months. Samples were taken every 30 days. The quality was assessed by organoleptic parameters, dry matter content, total sugar, inulin and vitamin C. Construction of models for predicting the quality indicators of Jerusalem artichoke was carried out on the basis of structural relationships with storage conditions, which were established using two approaches: correlation and information-logical.Results. Organoleptic parameters of tubers of the studied samples met the requirements of GOST 32790-2014. The mass fraction of total sugar and vitamin C at 18…22°C decreased relative to the initial content by 10.8 and 57.8%. Storage of tubers is accompanied by a decrease in inulin, and after three months, its mass fraction was lower than the original by 61.9 %. Using correlation analysis, linear structural relationships between quality indicators and storage conditions were established, according to which the content of carbohydrates and vitamin C primarily depends on the temperature regime (r=-0.8-0.4), and secondly – on the storage conditions term (r =-0,3-0,3). The use of the information-logical method allowed us to confirm the established correlation relations. The obtained adequate models for predicting the level of quality characteristics of tubers, depending on the storage period and temperature regime, allow you if necessary to quickly change the storage conditions. The analysis made it possible to identify the optimal term and temperature regime of storage of tubers.

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Modern society is paying more and more attention to healthy nutrition. Urgent issues are the spread of diabetes and the possibility of reducing its negative impact on the human body. According to statistics, more than 4 million patients in Russia have been registered with this disease, the overwhelming majority suffering from type II diabetes. Therefore, scientists worldwide are studying the products containing inulin, and one of its sources is the Jerusalem artichoke. Interest in this plant lies not only in the fact that its tubers contain functional nutrient in the form of inulin (2-20%) but also in the fact that they are rich in dietary fiber, macro-, microelements and contain almost all the essential amino acids that allow keeping the body at a high immune level. The present research studies the influence of the storage conditions and period of Jerusalem artichoke tubers on its chemical composition. The correlation coefficient helped establish linear structural relationships between quality indicators and storage conditions, according to which the carbohydrate, vitamin C and dry matter content primarily depend on the temperature regime (r = -0.8 -(-0.4)). The information-logical method made it possible to confirm the previously established correlation interrelations. The obtained models for assessing the quality of tubers (including inulin content), depending on the storage and temperature regime, allow promptly changing the storage conditions, if necessary. The analysis made it possible to single out a promising variety for industrial processing as an additive in the preparation of soft drinks such as sbiten. The authors established the optimal shelf life of the beverage so that it does not change from the category of non-alcoholic concentrates to fermented beverages; this allows preserving the size of tariffs.

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