Abstract
The research aimed to evaluate the performance of herbicides tank mixtures with the Fertiactyl Pos™ foliar fertilizer and the salicylic acid plant growth regulator in the weeds control and components of soybean crop production. The experiment was conducted in the field, Guarapuava-PR, in the 2016/2017 agricultural harvest, using randomized complete block design, with fifteen treatments and five replications. The treatments were consisted by: glyphosate (G = 960 g ha-1); lactofen (LAC = 120 g ha-1); cloransulam-methyl (CLO = 30,2 g ha-1); Fertiactyl Pos™ (FER = 400 mL ha-1); acido salicilico (AS = 500 g ha-1 of sodium salicylate); G + LAC; G + CLO; G + FER; G + AS; G + LAC + FER; G +CLO + FER; G + LAC + AS; G + CLO + AS, and controls with and without weeding. There were no reductions and/or even weed control increments for the herbicide tank mixtures with FER and AS. The treatments with LAC isolated and/or in association with AS or FER were highlighted by higher levels of visual intoxication, reduction of chlorophyll content and height of TMG 7262 RR™ soybean cultivar. However, the use of FER or AS in association with G + LAC resulted in grain yield higher than the weeding control, indicating attenuator potential of abiotic stress caused by herbicides.
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