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. Pest Identification
  2. Pest Identification - Outputs
  3. Publications
  4. Publications View
Publication View
Bagrada Bug Management Tips - 2019
Sep 2019
View Publication PDF (PDF, 1 MB)
Authors: John C. Palumbo
Volume: 10

Cropping System Considerations:
• Sudan grass, cotton and Bermuda grass crops may be considered key sources of Bagrada bug infestations for fall cole crop plantings. Anecdotal observations suggest that cole crops planted adjacent to or near these crops may be at a high risk from Bagrada bug infestations.
• Desert habitat can also be a source of Bagrada bugs due to the abundance of cruciferous weeds (London rocket, shepherds purse, wild mustards) and other host plants that flourish from spring and monsoon rains.
• Fields established adjacent to or near grassy areas, weedy drains, river bottoms and residential areas may also serve as a source of heavy Bagrada bug numbers, again due to the availability of host plants. 

Monitoring and Scouting:
• When sampling for Bagrada, look for fresh feeding signs on cotyledons and young leaves (see images below).
• Inspecting plants for adults can be misleading during the early morning (6:00-8:00 am) as adults are generally most active in fields from mid-morning (10:00 am) to late afternoon day (4:00 pm) when temperatures exceed 90°F.
• During warmer times of the day, adults can often be found on, or adjacent to, plants with recent feeding damage.
• Sprinkler irrigation appears to repel the adults somewhat, so begin sampling soon after sprinklers are shut off.
• Transplanted cole crops: Begin scouting for Bagrada bug the next morning following transplanting. The bugs can be difficult to find on plants when sprinklers are on, so when sprinklers are turned off at night or early morning carefully inspect all the leaves for the presence of fresh feeding symptoms and adults.
• Direct-seeded cole crop plantings: Begin scouting immediately upon seedling emergence prior to the stand being "lined out" (3-4-days post-wet date in early September). Bagrada bugs have been observed feeding on broccoli seedlings just as the cotyledons are appearing. Damaged or desiccated seedlings that appear wilted can be a result of feeding. On larger seedlings at the 1-2 leaf stage or larger, fresh damage often appears on the young leaves. 

Chemical Control:
• Preventing the adults from feeding on plant terminals and small cotyledons is critical to establishing and maintaining a quality stand.
• Based on preliminary research, a nominal action threshold has been established for bagrada bugs that triggers insecticide treatments when the number of plants with fresh feeding damage exceeds 5%.
• Contact insecticides (see Table 1) appear to provide the most effective control during stand establishment.
• Soil-applied neonicotinoid (e.g., imidacloprid, Belay, Venom) and diamide (e.g., Durivo/Coragen, Verimark) insecticides do not adequately prevent feeding damage on newly transplant crops or emerging direct seeded crops.
• Pyrethroids (i.e., Capture LFR) banded over the seedline at planting have shown to provide ~3-5 days control of adults on direct-seeded broccoli.
• Aerial application or chemigation with pyrethroids during germination and stand establishment can provide effective, short-term knockdown of adult populations on newly emerged or transplanted crops.
• On transplants, chemigations should be initiated upon the first signs of adults or fresh feeding damage. Our trials to date have shown that treatments for flea beetles have coincided with the presence of Bagrada bugs.
• On direct-seeded crops, consider a prophylactic chemigation when seedling first emerge (3-4 days after wet date), particularly if the grower has planted to a stand. Subsequent irrigation runs will likely dilute the chemical and may require additional treatments. Aerial applications applied at night after sprinklers are shut off may provide excellent knockdown of adults entering fields.
• Clothianidin treated broccoli seed (NipsIt) is now available. Research has consistently shown that this insecticide product can prevent Bagrada damage for 14-21 days following emergence (or about the 2-3 leaf stage).
• Once stands have become established, foliar sprays with pyrethroids (e.g., bifenthrin, Lambda cyhalothrin), chlorpyrifos, methomyl, and neonicotinoids (Venom/Scorpion) can effectively prevent feeding damage to plant foliage and terminal growth; length of control will likely depend on rates, coverage, spray frequency, tank-mix combinations, & duration of adult migration from outside the field.
• Research and anecdotal observations suggest that once heading brassicas plants (i.e., cauliflower, broccoli, cabbage) reach the 6-leaf stage they should not be susceptible to damage to the terminal growing point. However, leafy brassica crops may be susceptible to cosmetic damage to leaves from bagrada feeding for much longer periods.
• Control in organic cole crops can be difficult. Using transplants can improve stand establishment, but adults still need to be controlled to prevent terminal damage until plants reach the 6-leaf stage. A combination of Entrust (8 oz) and M-Pede (2%) has shown to provide the most promising efficacy in organic crops.

Table1


Bagrada1


Bagrada2
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