TITLE:
Application of Non-Selective Herbicides in the Pre-Harvest of Wheat Damages Seed Quality
AUTHORS:
Glauber Monçon Fipke, Thomas Newton Martin, Ubirajara Russi Nunes, vandro Ademir Deak, Jessica Deolinda Leivas Stecca, José Eduardo Minussi Winck, Luiz Fernando Teleken Grando, Anderson da Costa Rossato
KEYWORDS:
Glufosinate-Ammonium, Glyphosate, Paraquat, Triticum aestivum (L)
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.9 No.1,
January
19,
2018
ABSTRACT: Pre-harvest desiccation in order to minimize the
time of exposure to abiotic factors after physiological maturity is a practice
used in the production of quality seeds. The aim of this work was to evaluate
the physical, physiological and sanitary quality of wheat seeds from plants
that received non-selective herbicide application at pre-harvest. For this, the
treatments were applied on pre-harvest culture. A completely randomized design
was applied. We use the herbicides (glufosinate-ammonium, glyphosate and paraquat), phenological stages of herbicide application (Z-83,
Z-85, Z-87, Z-92) and additional treatment (without application). The routine
tests that express the physical, physiological and sanitary integrity of seeds
were evaluated. For herbicide treatments, there was an 8% and 26% reduction in
germination under laboratory conditions for BRS Parrudo and Sinuelo,
respectively. Soil emergence was 14% higher for the control treatment, not
statistically different for the Z-87 and Z-92 stages and also for the
herbicides glufosinate-ammonium and glyphosate for both cultivars. The
application of non-selective herbicides on wheat pre-harvest impairs the
physical and physiological quality and promotes faster deterioration. Vigor is
reduced under stress conditions by cold test and accelerated aging. There is no
influence on seed sanity.