Print version ISSN 0100-8358
ALMEIDA, F. S. de; PINEDA-AGUILAR, A. and RODRIGUES, B. N.. Paraquat residues in soybean grain when used on the crop dissecation. Planta daninha [online]. 1991, vol.9, n.1-2, pp. 85-91. ISSN 0100-8358. http://dx.doi.org/10.1590/S0100-83581991000100009.
The use of paraquat in the soy bean dissecation leave s re sidue in the grain wich content is related with the crop maturity at the time of application of the product and the time inter val between this operation and the crop harvest. The brasilian law estipulates a content lower that 0,1 mg kg-1 and an inter val of seven days, betwe en ti me of application and harvest. In order to get a medium content of 0,1 mg kg-1, with oscillations of 0,03 to 0,32 mg kg-1, it is necessary to do the paraquat applica tion with that interval of time to harvest but, also, that the crop maturation be lower than the correspondent to 80% of brown pods.
Keywords : Glycine max; maturation; harvest; paraquat.