Growing in different ecological conditions, pumpkin varieties acquire new economic characteristics, which indicates agroecological differentiation of pumpkin. Under growing conditions in the Ararat Plain, we studied 8 portion varieties of pumpkin, which differed in the timing of the onset of phenophases, the timing of the receipt of products and yield indicators, and quality indicators of fruits. According to the growing season, the varieties were divided into early-ripening varieties - Syunik, Saporik and Veronez, mid-ripening - Volzhskaya gray 92, Children’s delicacy, Konfetka, Prikubanskaya and late-ripening - Gribovskaya winter. The yield data of variety samples were analyzed: the most productive were the Muscat varieties Saporik and Prikubanskaya with high taste qualities of fruits - 23.2±1.1 and 30.6±1.1 t/ha. Among the large-fruited pumpkins, varieties Detskaya delikatesnaya and Syunik stood out, which were distinguished by high palatability and yield - 25.3±1.0 and 23.0±1.4 t/ha, respectively. The varieties Saporik, Syunik, Detskaya delikatesnaya and Konfetka stood out for the high content of total carotenoids, in which this indicator was 16.05, 10.50, 15.22 and 18.25 mg/%, respectively.

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Research was carried out in the greenhouse of the Scientific Center of Vegetable-Melon and Industrial Crops in the period of 2018-2019. The effect of organic fertilizer “Bio mix 1” of Indian origin on morpho-biological features of plants, yield capacity, quality indicators of fruits and seeds of tomato, sweet pepper and cucumber has been studied. The results of the studies showed that in all studied crops “Bio mix 1” fertilizer promoted the plant growth, development and yield capacity, besides, the quality indicators of fruits and seeds were improved.