A POTATO TUBERS TREATMENT INFLUENCE ON PHYTOSANITARY STATE OF POTATO PLANTINGS AND YIELD

Abstract

According to ISA - a branch of the FSBNU FNAC VIM in the conditions of the region from weed vegetation, pathogens of fungal, bacterial and viral diseases, a complex of soil-killing and terrestrial pests the loss of potato harvest is 30-40%. In 2019-2020 the preparations for the treatment of Gala tubers variety were tested on the V.I. Lenin collective farm in the Kasimovskiy district (Ryazan region) in accordance with the following scheme: 1. Tabu Super, VSK – 0.5 l/t + Maxim, KS – 0.4 l/t; 2. Tabu Super, VSK – 0.5 l/t + Sinclair, SC – 0.2 l/t; 3. Prestige, KS – 1.0 l/t + Regent, VDG – 0.08 kg/t + Aktara,VDG – 0.1 kg/t + Maxim, KS – 0.4 l/t. 4. Quadris, SK – 0.4 l/t + Regent, VDG – 0.08 kg/t (economic option). The area of cultivated plot is 10 hectares, the accounting area is 10 m² and the four-time replication. The soil of the site is sod-podzolic-gley sandy loam, humus content is 0.9%, potassium – content is medium, phosphorous content is low, pH level – 5.1, the predecessor was winter wheat. As a result of field tests of fungicides and insecticides used for pre-planting treatment of potato tubers, it was found that in the region the tested drugs effectively protected the crop plants from risoctoniasis and damage to the Colorado beetle. The use of the drugs studied contributed to a high yield of potato tubers 55.5 - 60.0 tons/ha and high - above 89% output of standard tubers.