Opportunities for overcoming the phytotoxicity of pesticides in winter barley (Hordeum vulgare L.) by co-administration with organic fertilizers

Dina Atanasova, Vasilina Maneva

Abstract: An experiment was carried out during 2015 - 2018 in the experimental field at the Institute of Agriculture – Karnobat, with two varieties of winter barley Emon and Lardeya. The treatment was applied with three combined herbicides, two insecticides and three organic fertilizers. The purpose of the study was to determine the possibility of reducing the phytotoxic effects of pesticides when co-using pesticides and organic fertilizers. Herbicide selectivity on the EWRS-scale was monitored. The mathematical processing of data was done according to the method of analyses of variance. The results show that the conditions of the year have the strongest influence on the yield - 85.74% for the Emon variety and 81.85% for the Lardeya variety. In the Emon variety, pesticides (6.62%) had the greatest influence, and in the Lardeya variety the organic fertilizers (4.77%). The interaction between pesticides and organic fertilizers is negligible.

Keywords: barley varieties; herbicides; insecticides; organic fertilizers; susceptibility

Date published: 2020-10-09