Chemical weed control in Rehmannia glutinosa and Astragalus membranaceus

This study was conducted to develop labor-saving cultural techniques for weed control using herbicides in Rehmannia glutinosa and Astragalus membranaceus, Napropamide, linuron(preemergence) and paraquat (postemergence) showed significant herbicidal effects. At the same time they did not turn out to be harmful to the growth of Rehmannia glutinosa. The yield of Rehmannia, glutinosa treated with paraquat was higher than that of the untreated. Napropamide showed significant herbicidal effect without harmful effects to the growth of Astragalus membranaceus. Etha1flura1in and metolachlor, however, were s1ightly harmful. The yield of Astragalus membranaceus was highest with napropamide.