Harvest Anticipation, Yield and Economic Feasibility of Wheat by Application of Non-Selective Herbicides

Glauber Monçon Fipke, Vinicius dos Santos Cunha, Evandro Ademir Deak, Jessica Deolinda Leivas Stecca, João Leonardo Fernandes Pires, Guilherme de Almeida Arismendi, Eduarda Grün and Thomas Newton Martin

Journal of Agricultural Studies, 2021, vol. 9, issue 2, 171-187

Abstract: The present work aims to evaluate the possibility of anticipating the wheat harvest by the application of non-selective herbicides in the pre-harvest conditions, thereby providing productive and economic viability. In total, 13 treatments were executed, which includes the spraying of different herbicide combinations (glufosinate-ammonium, glyphosate, and paraquat) in the phenological stages (Z-83, Z-85, Z-87, Z-92), and treatments without application of herbicides. Further, the treatment step was followed by providing different harvest conditions such as (i) glufosinate-ammonium- 9.5 and 8.8 days, (ii) glyphosate- 11.2 and 10.9 days, and (iii) paraquat- 7.9 and 8.5, where the first numerical value corresponds to number of days for the year 2016 followed by 2017. A mean reduction in seed yield of 4.6 % (BRS Parrudo) and 25.4 % (TBIO Sinuelo) was observed upon application of herbicides in the first two phenological stages. Additionally, an economic loss reaching up to R$ 2512 ha-1, was demonstrated. Therefore, the application of the non-selective herbicides glufosinate-ammonium and paraquat in the pre-harvest results in wheat phytointoxication, however, promoting harvest anticipation in 4.8 and 5.3 days, respectively.

Date: 2021
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