trans1_small
University of Arizona
When autocomplete results are available use up and down arrows to review and enter to select.
  • Home
  • Pest Identification
    • Pest Identification Home
    • Diseases
    • Weeds
    • Insects
    • Pest Diagnostics
    • Pest Identification - Outputs
    • Events
    • Frequently Asked Questions
  • Agricultural IPM
    • Agricultural IPM Home
    • Vegetables
    • Field Crops
    • Other Crops
    • Agricultural Pesticide Safety
    • Agricultural IPM Outputs
    • Events
    • Frequently Asked Questions
  • IPM Assessment
    • IPM Assessment Home
    • Crop Pest Losses
    • Impacts
    • EPA Pesticide Registration Reviews
    • How To Submit Comments to EPA
    • Previously Submitted EPA Comments
    • Projects
    • IPM Assessment Outputs
    • Frequently Asked Questions
  • Community IPM
    • Community IPM Home
    • School IPM
    • Public Health IPM
    • Turfgrass
    • Community Pesticide Safety
    • Community Insect Gallery
    • Handbook on Pests
    • Home and School IPM Newsletters
    • Community IPM Resources
    • Events
    • Frequently Asked Questions
  • Pesticide Education and Training
    • Pesticide Education and Training Home
    • Ag Licensing Resources
    • Community Licensing Resources
    • Special Pesticide Registrations
    • Pesticide Safety Outputs
    • Events
    • Frequently Asked Questions
  • About Us
    • Partners and Links
    • Contact Us
    • Organizational Chart
    • Arizona Pest Management Center
    • Mission
    • Working Groups
    • Organization
    • Social Media
  • Home
  • Pest Identification
    • Pest Identification Home
    • Diseases
      • Publications And Resources
      • Photo Gallery
    • Weeds
      • Sample Submissions
      • Publications And Resources
      • Noxious Invasive Weeds
      • Weed Photo Gallery
      • Herbicide Injury
    • Insects
      • Sample Submissions
      • Publications And Resources
      • Insect Collection
      • Photo Gallery
      • Insect Injury
      • Community Insect Gallery
    • Pest Diagnostics
      • Herbicide Injury
      • Insect Injury
      • Publications And Resources
      • Photo Gallery
    • Pest Identification - Outputs
      • Presentations
      • Publications
      • Shorts
      • Medias
    • Events
    • Frequently Asked Questions
  • Agricultural IPM
    • Agricultural IPM Home
    • Vegetables
      • Lettuce
        • Crop Management
        • Soil Management
        • Irrigation
        • Varieties
        • Insects
        • Diseases
        • Weeds
      • Melons
        • Crop Management
        • Soil Management
        • Irrigation
        • Varieties
        • Insects
        • Diseases
        • Weeds
      • Cole Crops
        • Crop Management
        • Soil Management
        • Irrigation
        • Varieties
        • Insects
        • Diseases
        • Weeds
      • Spinach
        • Crop Management
        • Soil Management
        • Irrigation
        • Varieties
        • Insects
        • Diseases
        • Weeds
      • Vegetable Outputs
        • Presentations
        • Publications
      • VIPM Updates
      • VIPM Archive
      • Vegetable Video Archive
      • VIPM Update Cartoons
      • Events
    • Field Crops
      • Alfalfa
        • Crop Management
        • Soil Management
        • Irrigation
        • Varieties
        • Insects
        • Diseases
        • Weeds
        • Pesticide
      • Corn and Sorghum
        • Crop Management
        • Soil Management
        • Irrigation
        • Varieties
        • Insects
        • Diseases
        • Weeds
        • Pesticide
      • Cotton
        • Crop Management
        • Soil Management
        • Irrigation
        • Varieties
        • Insects
        • Diseases
        • Weeds
        • Pesticide
      • Guayule
        • Crop Management
        • Soil Management
        • Irrigation
        • Varieties
        • Insects
        • Diseases
        • Weeds
        • Pesticide
      • Small Grains
        • Crop Management
        • Soil Management
        • Irrigation
        • Varieties
        • Insects
        • Diseases
        • Weeds
        • Pesticide
      • Risk Reduction
      • Outputs
        • Publications
        • Presentations
        • Videos
      • Events
      • Field Crops IPM Shorts
    • Other Crops
      • Citrus
      • Tree and Nut Crops
      • Cross Commodity
    • Agricultural Pesticide Safety
    • Agricultural IPM Outputs
      • Presentations
      • Publications
      • Agricultural IPM Shorts
    • Events
    • Frequently Asked Questions
  • IPM Assessment
    • IPM Assessment Home
    • Crop Pest Losses
      • Cotton Pest Losses
      • Vegetable Pest Losses
    • Impacts
    • EPA Pesticide Registration Reviews
    • How To Submit Comments to EPA
    • Previously Submitted EPA Comments
    • Projects
      • Crop Pest Losses
    • IPM Assessment Outputs
      • Presentations
      • Publications
      • Shorts
    • Frequently Asked Questions
  • Community IPM
    • Community IPM Home
    • School IPM
      • Stop School Pests
      • IPM for Sensitive Sites in the Built Environment
    • Public Health IPM
      • Arizona Conenose Bugs
      • Bed Bugs
      • Bees
      • Body Lice
      • False Chinch Bugs
      • Fire Ants
      • Head Lice
      • Longhorned Tick
      • Mosquitoes
      • Scorpions
      • EPA Border 2020
    • Turfgrass
      • Pre-emergence Weed Control - Lawns
      • History of the Lawn and Turfgrass
      • Nitrogen and Iron Deficiencies
      • Publications and Resources
    • Community Pesticide Safety
      • Presentations
      • Publications
    • Community Insect Gallery
    • Handbook on Pests
    • Home and School IPM Newsletters
    • Community IPM Resources
    • Events
      • 2021 Emergency Preparedness Workshop
      • 2022 Emergency Preparedness Workshop
    • Frequently Asked Questions
  • Pesticide Education and Training
    • Pesticide Education and Training Home
    • Ag Licensing Resources
    • Community Licensing Resources
    • Special Pesticide Registrations
    • Pesticide Safety Outputs
      • Presentations
      • Publications
      • Pesticide Safety Shorts
    • Events
    • Frequently Asked Questions
  • About Us
    • Partners and Links
    • Contact Us
    • Organizational Chart
    • Arizona Pest Management Center
    • Mission
    • Working Groups
    • Organization
    • Social Media
  1. Agricultural IPM
  2. Vegetables
  3. VIPM Archive
  4. VIPM Weeds View
Weeds
Jun 30, 2021
Summer Annual Grass Identification (2021)*
Two closely related but different species of several summer annual grasses are common in the low deserts. In general, these are all easy to distinguish from each other in the field and they respond similarly to herbicides. Some of these and their distinguishing characteristics are:

Watergrass (Echinochloa colonum) and Barnyardgrass (Echinochloa crusgalli)
These are very similar but watergrass has purple bands or chevrons on the leaves and barnyardgrass often has awns or bristles at the end of the spikelets. Both respond the same to herbicides.

Red Sprangletop (Leptochloa filiformis) and Mexican Sprangletop (Leptochloa uninervia)
Red sprangletop is, in general, a lighter green color and has a finer seed head than does Mexican sprangletop which is darker green or gray and has a visibly coarser seedhead. Both form clumps or crowns that often survive through the winter months. Both are fairly tolerant to Poast (sethoxydim) and Fusilade (fluaziflop) but are controlled with high rates of Select (clethodim).

Field Sandbur (Cenchrus pauciflorus) and Southern Sandbur (Cenchrus echinatus)
Both of these equally miserable weeds are only found in sandy soils and fairly easy to distinguish. Field sandbur has thinner, gray colored leaves and yellowish burs that are longer than broad. Southern sandbur has darker and broader leaves and fatter red colored burs. Southern sandbur has a more compact seed head with distinctly more burs than does southern sandbur. Both of these are fairly tolerant to Poast (sethoxydim), Select (clethodim) and Fusilade (fluaziflop).

Southwestern Cupgrass (Eriochloa gracilis) and Prairie Cupgrass (Eriochloa contracta)
These similar grasses are fairly easy to distinguish in the field. Southwestern Cupgrass is one of the wider leafed grasses in the deserts. Prairie Cupgrass leaves are not as wide and are hairy. Southwestern is more branched than prairie and the ligule is shorter and less prominent. The branches are longer and fewer on prairie than on southwestern Cupgrass. Both respond the same to most herbicides.

Green Foxtail (Setaria viridis) and Yellow Foxtail (Setaria glauca)
Both green and yellow foxtail typically form clumps, produce lots of seed and stand more upright than many other summer annual grasses. They are not difficult to distinguish in the field. Green has a darker greenish or brown seedhead compared to the yellow. The leaves of yellow are generally longer and have more bristles (5-20) per spikelet than green, which typically has 3 or less darker colored bristles. Both respond the same to most herbicides. This link will connect you with a powerpoint presentation that will help in the identification of summer annual grasses in the deserts.
To contact Marco Pena go to: marcop@ag.arizona.edu
APMC Logo BW Inverted
CALS Logo Black and white Inverted
ARIZONA PEST MANAGEMENT CENTER
University of Arizona
College of Agriculture and Life Sciences
Maricopa Agricultural Center

37860 W. Smith-Enke Road
Maricopa, AZ 85239
FULL CONTACT
LIST
facebook
twitter


© Arizona Board of Regents

University Privacy Statement