In Colombia you mean weeds, vegetation that affect crops, monte, charrascal.
This is a saying that is in Castile, and in almost all Spain with regard to the stubble: " that anda as p * ta per 34 Stover; that is, be in a bad situation, have difficulties.
Plant developed than maize after the harvest and put to dry, is given as food to livestock, in the absence of fresh pastures
RASTROJO:MALEZA, SCRUB STRAW.