Principal source: Ramey, 2001. Iris pseudacorus L.
IPANE, 2001Iris pseudacorus
Compiler: National Biological Information Infrastructure (NBII) & IUCN/SSC Invasive Species Specialist Group (ISSG)
Review: Expert review underway
Publication date: 2005-11-16
Recommended citation: Global Invasive Species Database (2024) Species profile: Iris pseudacorus. Downloaded from http://www.iucngisd.org/gisd/species.php?sc=873 on 08-12-2024.
Mechanical: Tu (2003) states that, \"Manual or mechanical methods that remove the entire I. pseudacorus rhizome mass can successfully control small, isolated patches. These methods, however, are very time consuming and labor-intensive, since even small rhizome fragments can resprout. Additionally, digging disturbs the soil, may fragment rhizomes, and promote germination of I. pseudacorus and other undesirable species from the soil seed bank (Jacono 2001, in Tu 2003). Pulling or cutting I. pseudacorus plants may provide adequate control, but only if it is repeated every year for several years to weaken and eventually kill the plant. Dead-heading (removing the flowers and/or fruits) from plants every year can prevent seed development and seed dispersal, but will not kill those plants (Crawford 2000, in Tu 2003).\" Ramey (2001) states that, \"Once an infestation, with its extensive rhizomes, has taken hold, machines and possibly fire are the only possibilities for management.\"
Chemical: Tu (2003) reports that, \"I. pseudacorus can be effectively controlled by herbicides. Since it usually grows in or adjacent to water, an aquatic-labeled herbicide and adjuvant must be used. Glyphosate (for example, tradenames Rodeo®, Aquamaster® or Glypro®) applied in a 25% solution (13% a.i.) using a dripless wick/wiper applicator, or applied in a 5 to 8% solution if sprayed, when used with the appropriate non-ionic surfactant adjuvant, can effectively kill I. pseudacorus (R. McClain, pers. comm.). The timing and choice of application technique will determine control efficacy and should work to minimize off-target effects. I. pseudacorus can be controlled by either directly applying the herbicide to foliage, or by immediately applying herbicide to freshly cut leaf and stem surfaces. Herbicides can be directly applied to I. pseudacorus foliage or cut stems by a dripless wick system or using a backpack sprayer. Be sure to always take appropriate precautions and wear suitable clothing and equipment, and follow all instructions on the herbicide label. Use a dye in the herbicide mix so you can watch for accidental contact or spill of the herbicide.\" Ramey (2001) reports that, \"I. pseudacorus is susceptible to many registered herbicides, but is resistant to terbutryne.\"