Xanthium, parthenium, cyperinus are examples of ________ .
weeds
Weeds are fast growing, unwanted plants growing in cultivated fields which take up nutrients and reduce the growth of the crop. Therefore, removal of weeds from cultivated fields during the early stages of crop growth is essential for a good harvest. Weedicides can be effective for removal of weeds. Xanthium, parthenium and cyperinus are some examples of weeds.