01711naa a2200265 a 450000100080000000500110000800800410001902400350006010000180009524501130011326000090022652009480023565000140118365000220119765300180121970000150123770000170125270000200126970000190128970000210130870000130132970000150134270000270135777300610138421274372022-06-10       2020    bl uuuu     u00u1 u    #d7 a10.1017/S00144797200002902DOI1 aCONCENÇO, G.  aHerbicide residues of pre-harvest burndown in cowpea bean (Vigna unguiculata) grains.h[electronic resource]  c2020  aCowpea bean (Vigna unguiculata) is usually submitted to pre-harvest burndown with herbicides aiming toan early harvest. We aimed to quantify the residues of paraquat, diquat, glufosinate-ammonium and glyph-osate in cowpea grains subjected to two timings of pre-harvest burndown. Three identical experimentswere installed in Dourados (Lat. 22° S), Sinop (Lat. 11° S) and Teresina (Lat. 05° S), Brazil, comprisingthe pre-harvest burndown of cowpea bean with these herbicides, applied either with 50 or 75% of the podsdry and ready for harvest. As hotter and drier the location as slower the herbicide dissipation. Glyphosateshould not be used for pre-harvest burndown of cowpea. Herbicide residues were above the maximumlevels stated by the Brazilian legislation when applied with 50% dry pods. Burndown herbicides aimingto speed harvest should be applied with at least 75% dry pods in cowpea to ensure safe herbicide residuelevels in grains.  aHerbicida  aVigna Unguiculata  aFeijão caupi1 aVIVIAN, R.1 aIKEDA, F. S.1 aPIZZUTTI, I. R.1 aVELA, G. M. E.1 aFERRACINI, V. L.1 aNORA, L.1 aCECCON, G.1 aCONCENÇO, F. I. G. R.  tExperimental Agriculturegv. 56, n. 6, p. 781-793, 2020.