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  1. Pest Identification
  2. Weeds
  3. Noxious Invasive Weeds
Noxious and Invasive Weeds
Noxious and Invasive Weeds
While most weeds may be bothersome, there are a handful of weeds that get special attention in the hopes of deterring them from further infesting the state. These weeds are known as noxious weeds. Invasive weeds also get special consideration due to the potential harm they could cause if they were to permanently establish themselves within the state.
Regulated Weeds
  • Buffelgrass
  • Burclover
  • Common Purslane
  • Field Bindweed
  • Field Sandbur
  • Floating water hyacinth
  • Puncturevine
  • Southern Sandbur
 
Restricted Weeds
  • Camelthorn
  • Dalmation toadflax
  • Diffuse knapweed
  • Dodder
  • Floating water hyacinth
  • Globed-podded hoary cress (Whitetop)
  • Halogeton
  • Jointed goatgrass
  • Quackgrass
  • Russian knapweed
  • Scotch thistle
  • Spotted knapweed
  • Sweet resinbush
  • Texas blueweed
  • Three-lobed morning glory
  • Yellow starthistle (St. Barnaby’s thistle)
Noxious Weeds Publications
  • Feb 2017
    Selective Preemergence and Postemergence Control of Panic Liverseedgrass (Urochloa panicoides) in Desert Turf
    Publication (PDF, 16.6MB)
    Authors: Kai Umeda
    Panic liverseedgrass is a relatively new problem weed occurring in turfgrass in the low desert region of Arizona. It is invasive and federally listed as a noxious weed. Herbicide use and efficacy information is limited to row crops or noncrop areas.
  • Jun 2015
    Herbicides with Activity on Nutsedge
    Publication (PDF, 12KB)
    Authors: B. Tickes
    A short easy to read list of Herbicides with activity on Nutsedge. It is split into Preemergence and Postemergence tables.
  • May 1991
    Nitrogen Management Guide for Pistachios
    Publication (PDF, 107KB)
    Authors: Thomas A. Doerge, Robert L. Roth, Bryant R. Gardner
    Mature pistachio trees are moderately heavy users of nitrogen. The pronounced alternate bearing cycles observed in pistachios have the greatest influence on the optimum Nitrogen fertilizer rate to use.

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Noxious Weeds Presentations
  • Jun 2019
    Selection of appropriate preemergence and postemergence herbicides for strategic weed control in turf
    Presentation (PDF, 8.8MB)
    Authors: Kai Umeda
    Location Presented: Guam
  • Jan 2008
    Weed Identification and Control
    Presentation (PDF, 2.4MB)
    Authors: Kelly Young
    Location Presented: Maricopa County

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ARIZONA PEST MANAGEMENT CENTER
University of Arizona
College of Agriculture and Life Sciences
Maricopa Agricultural Center

37860 W. Smith-Enke Road
Maricopa, AZ 85239
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