Research of biological action of phytoncides of different origin on infected agricultural seeds

One of the most harmful crop diseases is Alternaria blight. Alternaria blight affects the plant and, reducing the photosynthetic surface of the leaves, leads to lower yields and product pollution with mycotoxins and allergens. Among a wide range of methods for combating this disease, a direction of technologies for the creation and use of biologically active remedies is actively developing. Phytoncides act as a biologically active substance, which increase the resistance of plants to the action of pathogens. This article studies the effects of plant biologically active substances on the growth and development of healthy and infected Alternaria tenuis Nees et Fr. seedlings wheat variety Bezenchukskaya 210 under the laboratory conditions. The research material was: buckwheat flavonoids, soya lectins, common spruce extracts, blue spruce extracts, antibacterial substance of barley, pine oil. Phytoncides were obtained by extraction using organic and inorganic solvents. In the course of the experiment, biologically active substances were identified that stimulate the development of a wheat plant against a healthy and infected background of alternaria. It was found that volatile production contained in the extract of blue spruce leads to increased growth of seedlings of wheat infected with alternariosis. Barley antibacterial substances enhance the growth of roots of healthy and infected wheat seedlings Alternaria tenuis Nees et Fr. It is shown that the effect of the remaining studied biologically active substances of plants leads to a slowdown in the growth of wheat seedlings for nine days. An exception was soya lectins, which did not show an increase in the inhibitory effect on healthy wheat seedlings.