The impact assessment of organic fertilizer from marine hydrobionts on the potato yield and incidence of the black scab (Rhizoctonia solani).

Abstract

The paper presents the results of studies on the impact of organic fertilizer Bio-Fish and Bio-Mix from marine hydrobionts on increasing yield of potato and reducing the incidence of tubers and plants by the black scab (Rhizoctonia solani) in the Kamchatka Krai. The maximum yields of potatoes were obtained using Bio-Fish agent for treatment of tubers and spraying of plants against the backgrounds of (NPK)90 and (NPK)60 mineral nutrition which were 4.4 and 3.4 tons per hectare with a yield of 27.6 and 25.8 t/ha, respectively. By the end of the potato growing season, against the background of mineral fertilizer (NPK)90 and (NPK)60, the increase in the field stability of plants for the black scab was observed with a double treatment with Bio-Fish agent, the average development and spread of the black scab was lower by 5.8 and 11.2 %; 6.5 % and 18.6 %. The expediency of using Bio-Fish organic fertilizer in an integrated potato protection system from Rhizoctonia solani is shown.