EFFECTIVENESS OF TANKS AGAINST THE COMPLEX OF HARMFUL BIOTA IN SPRING BARLEY CROPS

Abstract

Seed treatment is a mandatory environmentally and economically beneficial measure in modern technologies for growing spring barley. Seed treatments are highly effective against harmful biota at the initial stage of crop organogenesis – from the emergence of seedlings to the tillering phase. The aim of the work is to increase the effectiveness of barley protection by using tank mixtures of insecticidal, fungicidal and insecto-fungicidal treatments with micronutrients. The study was conducted in spring barley crops of the Helios variety at the educational and research field of the Polissia National University. It was found that the insecticide-fungicide Celeste Top 312.5 FS, TN (1.5 l/t) and the tank mixture of insecticide Gaucho EVO 275 FS, TH (2.0 l/t) with fungicide Maxim Star 0.25 FS, TH (1.5 l/t) when treating spring barley seeds were quite effective against mold fungi of the species Penicillium viridicatum Westling., Aspergillus glaucus L., Mucor mucedo Fresen, the causative agent of helminthic root rot, leafhoppers, and cereal flies. The use of microfertilizers Bactolive Seed, ZP (0.1 kg/t) and Vertibiomag-M, r. (6 l/t) with the test pesticides increased the field germination of spring barley seeds by an average of 5–6% compared to the control variant. The addition of microfertilizers increased the effectiveness of pesticides against helminthic root rot of barley in the tube phase by 1.3–5.9% (Celest Top 312.5 FS, TN, 1.5 l/t + fertilizer) and by 15.6–17% (Gaucho EVO 275 FS, TH, 2.0 l/t + Maxim Star 0.25 FS, TH, 1.5 l/t + fertilizer); in the waxy ripeness phase by – 4.9–8.5% and 14–16.8%, respectively, compared to the option without fertilizers. The results of the evaluation of the insect-fungicide Celeste Top 312.5 FS, TH, 1.5 l/t and the insecticidal-fungicidal mixture (Gaucho EVO 275 FS, TH, 2.0 l/t + Maxim Star 0.25 FS, TH, 1.5 l/t) separately and in combination with microfertilizers revealed a positive effect on the formation of elements of the crop structure and yield of spring barley. The combined use of pesticides and fertilizers contributed to a significant increase in barley yield by an average of 1.2–1.36 t/ha compared to the control variant.