The effect of tank mixture of herbicides on the contamination of crops and productivity of spring wheat

Abstract

Relevance. The main advantage of this method is its high biological efficiency (up to 90% or more) against the background of a quick payback from a significant increase in production due to the stored harvest. At the same time, in some cases, it becomes possible to manipulate the timing of the use of herbicides, taking into account their selectivity, operational qualities, as well as the industrial employment of the forces and means of an agricultural enterprise engaged in weed control. Therefore, the study and selection of modern herbicides in the fight against weeds is an urgent task of great practical importance.

Methods. The object of research is a variety of spring soft wheat Zlata. The predecessor is potatoe. The seeding rate is 5.5 million. The scheme of the experiment included 2 options: 1) control (without the use of herbicides); 2) the use of a tank mixture of herbicides («Ballerina»+ «Bomba» + «Lastic Extra»). The sowing area of the crop is 3 ha, the area of the accounting plots is 50 m2, the repetition of the experiment is 3 times.

Results. The conducted studies have shown that under experimental conditions, the share of juvenile monocotyledonous weeds in spring wheat crops accounted for 68.9%, of juvenile dicotyledonous weeds — for 31.1% of the total number. The most widespread among them were: Echinochla crusgalli — 68.9%, Chenopodium album — 13.1%, Amaranthus retroflexus — 6.2% and Galeopsis tetrahit — 5.2%. The use of a tank mixture of herbicides «Ballerina» + «Bomba» + «Lastic Extra» made it possible to reduce the number of weeds by 90.4–94.1%, reduce the loss of biological grain yield by 14%, ear weight —by 7%, productive bushiness — by 5%, weight of 1000 grains —by 2%, and also increase the yield of spring wheat grain by 0.68 t/ha and get an additional profit of 1.9 thousand rubles/ha.