Xanthium pensylvanicum

In addition to morningglory, similar trends were observed for cockle-bur (Xanthium pensylvanicum Wallr.). Higher cocklebur populations were observed in tilled plots than in non-tilled plots (data not shown). 

Fig. 10. Turnover of chlorogenic acid in leaf discs of Xanthium pensylvanicum [U- C]-L-Phenylalanine was applied to the upper surface of leaf discs for 1 h (pulse). Then the discs were rinsed and placed on moist filter paper exposed to light (chase). At the time points indicated the absolute amount and the specific activity of chlorogenic acid were measured...

Cinnamic acid Chlorogenic acid 20 h Xanthium pensylvanicum. 

In soils without a history of EPTC or butylate use, R251005 increased velvetleaf (Abutilon theophrasti Medic.), common cocklebur (Xanthium strumarium L.), and Pennsylvania smartweed (Polygonum pensylvanicum L.) control compared to EPTC alone (Table XI). In an EPTC history soil, Texas panicum (Panicum texanum L.) control was also increased (Table XI). 

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