Sweet Potato Insect Pests and Other Updates for Vegetable Producers
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Sweet Potato Insect Pests and Other Updates for Vegetable Producers

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Sweet Potato Insect Pests and Other Updates for Vegetable Producers Sweet Potato Insect Pests and Other Updates for Vegetable Producers Presentation Transcript

  • Vegetable Entomology Workshop Dr. Ayanava Majumdar Ext. Entomologist, State SARE Coordinator Gulf Coast Research & Ext. Center 8300 State Hwy 104, Fairhope AL 36532 Tel: (251) 331-8416 [email_address]
  • Workshop content
    • PRE-TEST (3 minutes)
    • Sweet potato insect pests (ANR-1104)
    • Insecticide update
    • IPM insect monitoring project results
    • Insecticide update (refer to the book)
    • Check out the IPM exhibit before you leave & ask questions
    • POST-TEST/EVALUATION (5 minutes)
  • Impact of Sweet Potato Insect Pests
    • Crop loss to insects without intervention: 50%
    • Sweet potato production states: AL, MS, LA, NS, SC, TX ($216 million; 81,000 A)
    • Cost of insecticides is about10% of production cost or more
    • Six major insect pests: wireworms, white grubs, sweet potato weevil, sweet potato flea beetle, whitefringed beetle, cucumber beetle
    Gianessi, 2009: Crop Protection Research Institute
  • Sweet potato insect pests
    • Whitefringed beetles:
    • All beetles are females, emerge in late June
    • Grubs: small head, dark mouthparts, feed on roots (July-Aug.)
    • Damage: Shallow feeding holes on side but deep feeding at ends
    • Management: plant early, rotate with a grass crop or avoid planting
    • Chemical: Imidan 70 W (phosmet) against adults – 7 PHI
  • Sweet potato insect pests
    • Spotted & Banded cucumber beetles:
    • Beetles: yellow with spots or bands
    • Eggs laid in soil
    • Larvae feed on developing roots: Shallow round holes in groups , channels under skin
    • Management: no effective cultural control tactic
    • Chemical: bifenthrin, carbaryl for beetle control
  • Sweet potato insect pests
    • Wireworms ( Conoderus sp.):
    • Major problem in some areas
    • Use ground bait stations - take handout, see IPM exhibit
    • Damage: Deep round holes
    • Managing adult beetle difficult
    • Chemical: broadcast insecticide, chlorpyrifos (Lorsban)…behavioral resistance is of concern
  • Sweet potato insect pests
    • White grubs:
    • Larvae of June beetles, overwinter in soil
    • Damage: grubs eat off large areas of roots, wide feeding channels
    • Serious pest if SP follow pasture
    • Chemical: chlorpyrifos, bifenthrin
  • Sweet potato insect pests
    • Flea beetles ( Chaetonema, Systena sp.):
    • Beetles eat foliage, migratory, eggs laid in soil
    • Grubs live in soil, resemble small cucumber beetle
    • Damage: feeding holes irregular shape, then tunnels under skin
    • Management: remove weeds (bindweed) from field edges
    • Chemical: chlorpyrifos spay, bifenthrin
  • Sweet potato insect pests
    • Sweet potato weevil:
    • Can cause 90% yield loss
    • Low root damage can give off flavor/odor to the produce
    • AL Dept. of Agric. has quarantine in place to stop the spread
    • Management: purchase only certified seed free of infestation, destroy plant debris including culls, destroy morning , clean storage houses
    • Chemical: target adult weevil
  • New Insecticides for Better IPM
    • Spinetoram (Radiant 1SC, by Dow AgroSciences)
      • Activity against thrips, corn earwom, European corn borer, imported cabbageworm, diamondback moth, etc.
      • Spinosyn insecticides: short pre-harvest interval (1 to 3 days), some insecticide resistance concerns.
    • Spirotetramat (Movento 2SC by Bayer CropScience)
      • Metabolic disruptor
      • Activity against sucking pests like aphids and whiteflies.
    • Spiromesifen (Oberon 2SC by Bayer CropScience)
      • Belongs to the same family of products as Spirotetramat
      • Mite and whitefly control
  • New Insecticides for Better IPM
    • Rynaxypyr (Coragen 1.67SC by DuPont and other products)
      • New type of nerve poison which impacts insect muscles
      • Acts rapidly in insects and has very good activity against the Colorado potato beetle and caterpillars in young stages
      • Safe for parasitoids, predators, and pollinators
    READ MORE IN THE NEW VEGETABLE HANDBOOK!
    • Flubendiamide (Synapse 24WG/Belt SC by Bayer)
      • Feeding inhibitor
      • Foliar spray or chemigation
      • Effective against corn earworm, European corn borer, fall and beet armyworms, loopers, and other caterpillars.
  • Insect Pests of Other Vegetables (Quick discussion on insect ID and IPM insect monitoring project)
    • 14 member team
    • Pheromone traps: commercial types
    • Study the IPM exhibit
    • Project archive: www.aces.edu/go/85
    • Web outreach: Blogs , YouTube
    • AU Pest Alert (email): July-October
    • “ Timely Information” on AlabamaCrops.com, AGFAX.COM, www.aces.edu
    • IPM Hotline (messages): 1-800-446-0375
    • Travelling exhibition at meetings
    • Revisions to SE Vegetable Production Handbook
  • Why subscribe to AU Pest Alert? Outbreak of armyworms in soybean, peanuts
  • 20 (4) 19 (3) 15 (4) 32 (5) 48 (5) 16 (5) 13 (5) 27 (6) 36 (6) Late Aug. & Sept. Late Aug. & Sept. July, Aug., Sept. 29 (6) Late July-Aug. 17 (3) 12 (4) Statewide total = 1386
  • Microspines
  • 3 (4) 2 (3) 7 (4) 20 (5) 15 (5) 3 (5) 6 (5) 6 (6) 3 (6) Early Sept. Early Aug. , Sept. Late Aug., Sept. 1 (6) Late July, then none 3 (3) Weather impact: Temp: mixed Rainfall: NS Rain days: NS Statewide total = 342
  • Microspines
  • 6 (4) 10 (3) 25 (4) 12 (5) 16 (5) 7 (5) 5 (5) 3 (6) 11 (6) June, Aug., Sept. July, Aug. Aug., Sept. 8 (6) 3 (3) 8 (4) Statewide total = 589 17 (4) Late Aug.
  •  
  • Why read AU Pest Alerts? Lesser cornstalk borer in many crops (Clarke, Washington, Escambia Co., Henry Counties)
  • 119 (5) 116 (5) 76 (5) 46 (5) 142 (6) 143 (6) July, Aug. July, Aug. Late Aug., Sept., Oct. 77 (4) Statewide total = 3586
  •  
  • 4 (4) 28 (3) 3 WCRW 12 (4) 7 (5) 1 (5) 1 (5) 4 (5) 2 (6) June, July June June 8 (6) 1 WCRW Statewide total = 266 June WCRW SCRW
    • Project archive: www.aces.edu/go/85
    • Web outreach: Blogs , YouTube
    • AU Pest Alert (email): July-October
    • “ Timely Information” on AlabamaCrops.com, AGFAX.COM, www.aces.edu
    • IPM Hotline (messages): 1-800-446-0375
    • Travelling exhibition at meetings
    • Revisions to SE Vegetable Production Handbook
  • IPM-CORE New Integrated Vegetable Entomology Website: SUBSCRIBE TO BLOGS FOR AUTOMATIC EMAIL UPDATES
  • Acknowledgements
    • IPM-CORE Coordinators:
      • Drs. A. Majumdar, H. Fadamiro
    • IPM Insect Monitoring Project:
      • Lloyd Chapman
      • Neil Kelly
      • Michael Reeves
      • Gary Gray
      • James Miles
      • William East, Jr.
      • Brandon Dillard
      • Leonard Kuykendall
      • Chris Becker
      • Timothy Reed
    Thank you very much. Please complete the POST-TEST now .