[Chemical weed control in the cropping of medicinal plants. Part 1: Valerian (Valeriana officinalis L.) (author's transl)].
More than 40 herbicides have been tested in field trials with valerian over a period of several years. The following herbicidies have proved best suited: chloropham for application in autumn after planting, metobromurone for spraying in the early spring at the commencement of sprouting, nitrofen or a nitrofen-simazine compound preparation for application in May. The utilization of a sequence of herbicides  led to a 90% reduction of the weed cover and a 65% reduction of the manual work needed for weed control. The yield and the essential oil and valepotriate contents of valerian were not impaired. The results from residue analyses are presented.
D002748:Chlorpropham; D006540:Herbicides; D010598:Pharmacognosy / Q000379:methods; D010647:Phenyl Ethers; D010671:Phenylurea Compounds; D010946:Plants, Medicinal; D012621:Seasons; D012839:Simazine; D014632:Valerian / Q000032:analysis / Q000254:growth & development*
D006540:Herbicides; D010647:Phenyl Ethers; D010671:Phenylurea Compounds; D002748:Chlorpropham; C008770:metobromuron; C007350:nitrofen; D012839:Simazine
Chemische Unkrautbekämpfung in Arzneipflanzenkulturen. 1. Mitteilung: Baldrian (Valeriana officinalis L.).