Sicklepod (Senna obtusifolia L., Fabaceae) is a leguminous plant that thrives unwanted in crop fields such as soybean farms and is therefore described as a weed especially in many Southeastern States in the US. Although the recent introduction of “round-up-ready” soybeans mitigates infestation of the beans by sicklepod, the latter is so prolific that even volunteer stands yield over a 1120 kg/h...