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The natural world of the Far East Russia has great potential for the detection and isolation of biologically active compounds that can increase productivity of agricultural plants in the zone of risky agriculture. Growth regulating activity of metabolites of marine organisms -alkaloids were studied. Damirone B (1), debromohymenialdisine (2), and dibromoagelaspongin (3) were tested in field conditions as growth stimulants of barley (Hordeum vulgare L.), wheat (Triticum aestivum L.) and common buckwheat (Fagopyrum esculentum Moench). It was shown that the stimulatory effects depend on the chemical structure of the alkaloids and the plant species. Compounds 1, 2, and 3 at different concentrations, stimulate growth and productivity of barley, wheat and buckwheat. Their introduction into practice will increase plant productivity, and hence the profitability of crop production.

The article discusses the varietal preference of Rhopalosiphum padi Linnaeus, 1758 in the Far East South, and describes the phenology of the pest. It was found that the most optimal for the aphids development and nutrition were Primorskaya 40, Khabarovchanka, Primorskaya 39 wheat varieties, as well as barley varieties Primorskiy 89 and Vostochny. The least suitable were the Primorskiy 98 and Primorets barley varieties. Wheat and barley species-specific effects on the Rhopalosiphum padi Linnaeus, 1758 development and productivity in the Russian Far East South is poorly understood and requires further research.