An evaluation of preemergence herbicides for control of prostrate spurge (Euphorbia supina Raf.) in container nursery production of low water use landscape plants in the Desert Southwest
AuthorClark, Leverett T.
Weeds -- Control -- Arizona.
Ornamental horticulture -- Arizona.
Committee ChairSacamano, C. M.
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractFive preemergent herbicides were evaluated for control of prostrate spurge (Euphorbia supina Raf.) in seven container-grown arid landscape ornamentals at the following rates in kilograms active ingredient per hectare: oxyfluorfen, 0.6, 1.1 and 2.0; oryzalin, 3.0, 6.0 and 12.0; Dacthal, 22.4, 44.8 and 89.7; norea, 1.2, 2.2 and 4.5; and axadiazon, 2.2, 4.5 and 9.0, respectively. Prostrate spurge reaches its peak in summer. During the first test, February 5 - May 20, 1981, or 104 days, all herbicides provided satisfactory to complete control at all rates, except norea at 1.2 and 2.2 and oxadiazon at 2.2 were ineffective in one test species. During the second test, May 21 - August 17, 1981 or 88 days, oryzalin gave the best overall control; oxyfluorfen provided effective control only at 2.2; oxadiazon produced erratic results; and norea and Dacthal became ineffective at all rates after 23 days. No phytotoxicity to the plants was observed.
Degree ProgramPlant Sciences