Geyer larkspur, a poisonous, perennial forb, is highly susceptible to paraquat applied when flowering stems are slightly above ground. At 1/2 lb./acre, paraquat killed 90 to 95% of geyer larkspur, but was less effective when the treatment was preceded with 2,4-D at 2 lb./acre. Textile onion and most annual species were susceptible to paraquat, while all other perennial species were resistant. There was some reduction in herbage yields in the year of treatment. Although paraquat is not registered for controlling geyer larkspur, it could be considered for that purpose. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.