The Latest

Events

  1. Texas: Feed-Grain Marketing Workshop, Amarillo, Feb. 10-11

    February 10 @ 8:00 am - March 11 @ 5:00 pm
  2. West Florida Crops Meeting, Jay, February 11

    February 11 @ 7:45 am - 12:00 pm
  3. Georgia: Ag Business Planning Workshop, Glennville, Feb. 11, 18

    February 11 @ 8:00 am - February 18 @ 5:00 pm
  4. Alabama-Florida Peanut Trade Show, Dothan, February 11

    February 11 @ 8:00 am - 5:00 pm
  5. Four States Agricultural Exposition, Texarkana, Feb. 11

    February 11 @ 8:00 am - 5:00 pm
  6. Ohio: Agronomy Workshops, Wooster, Feb. 15, 16

    February 15 @ 8:00 am - February 16 @ 8:00 am
  7. Louisiana: Irrigation Management Workshop, Marksville, Feb. 16-17

    February 16 @ 8:00 am - February 17 @ 8:00 am
  8. Tennessee: Irrigation Meeting, Somerville, Feb. 16

    February 16 @ 8:00 am - 5:00 pm
  9. Tennessee: Cotton Focus Meeting, Jackson, Feb. 18

    February 18 @ 8:00 am - 5:00 pm
  10. Illinois: Ag Tech Innovation Summit, Champaign, Feb. 18

    February 18 @ 8:00 am - 5:00 pm
  11. Texas: Oil, Gas Leasing Workshop, College Station, Feb. 22

    February 22 @ 8:00 am - 5:00 pm
  12. Georgia: Required Classroom Trainings for Auxin Herbicide Tolerant Crops

    February 22 @ 8:00 am - March 1 @ 5:00 pm
  13. Texas: Wild Pig Management Workshop, Burnet, Feb. 24

    February 24 @ 8:00 am - 5:00 pm
  14. Mississippi: Ag Waste Disposal Day, Charleston, Feb. 24

    February 24 @ 8:00 am - 5:00 pm
  15. Virginia: USDA Agricultural Outlook Forum, Arlington, Feb. 25-26

    February 25 @ 8:00 am - February 26 @ 5:00 pm
  16. Georgia: Pest Manager Training, Forsyth, Feb. 25

    February 25 @ 8:00 am - 5:00 pm
  17. Tennessee: Winter Row Crop Marketing Meeting, Mason, Feb. 25

    February 25 @ 8:00 am - 5:00 pm
  18. Texas: Rice Technical Working Group, Galveston, March 1-4

    March 1 @ 8:00 am - March 4 @ 8:00 am
  19. Texas: Rice Technical Working Group Conference, Galveston, March 1-4

    March 1 @ 8:00 am - March 4 @ 5:00 pm
  20. Texas: Permian Basin Cotton Conference, Big Spring, March 1

    March 1 @ 8:00 am - 5:00 pm
  21. Kentucky: IPM Training, Princeton, March 2

    March 2 @ 8:00 am - 5:00 pm
  22. Texas: Regional Sorghum Program, Plainview, March 3

    March 3 @ 8:00 am - 5:00 pm
  23. Indiana Small Farm Conference, Danville, March 4-5

    March 4 @ 8:00 am - March 5 @ 5:00 pm
  24. Kansas: 103rd Annual Cattlemen’s Day, Manhattan, March 4

    March 4 @ 8:00 am - 5:00 pm
  25. Kentucky: Integrated Pest Management Training, Princeton, March 2

    March 6 @ 8:00 am
  26. Oklahoma: Irrigation Conference, Woodward, March 8

    March 8 @ 8:00 am - 5:00 pm
  27. Oklahoma: Pecan Management Course, Stillwater, March 8

    March 8 @ 8:00 am - 5:00 pm
  28. Missouri: Free Pesticide Collection Event, Portageville, March 12

    March 12 @ 8:00 am - 5:00 pm
  29. Florida: Carinata Summit, Quincy, March 15-16

    March 15 @ 8:00 am - March 16 @ 5:00 pm

 

AgFax Media. LLC

142 Westlake Drive Brandon, MS 39047

601-992-9488 Office

Owen Taylor Debra L. Ferguson Laurie Courtney

      

Circulation Questions?

Contact Laurie Courtney

 

Texas Cotton: Pointers On Fleahopper Decisions

Owen Taylor
By Apurba Barman, Entomologist, Texas A&M AgriLife Extension June 20, 2014

Texas Cotton: Pointers On Fleahopper Decisions

Generally speaking, cotton seems to be growing slow and behind normal expectations. The good news is that this year we have not experienced significant thrips pressure. Cotton south of Lubbock has experienced negligible pressure.

Our scouting indicates that thrips numbers in cotton are really low and much below economic threshold, even where cotton was planted next to wheat. However, some areas in the northern High Plains (Hale and Swisher Counties) have experienced moderate levels of thrips and producers have treated. Although insecticidal seed treatments should protect plants from thrips for 2 to 3 weeks, plants become vulnerable to thrips if germination and growth are delayed.

Once cotton passes beyond the 4- to 5-true-leaf stage, plants can sustain thrips injury without significant economic loss.

Weeds are also growing profusely following frequent rains. It may be a good opportunity to tank mix an insecticide such as acephate with a herbicide, thus combining weed control and thrips management in a single field operation. It is important to keep the fields weed free as much as possible because some of these weeds (such as Russian thistle and silver leaf nightshade) can attract other insect pests like cotton fleahoppers and Lygus bugs into your cotton fields.

cotton-fleahopper-dime-texas-am-06202014-facebook

This often-used photo shows an adult cotton fleahopper next to a dime. That’s how small they are.

As cotton starts squaring, keep an eye on the square (fruit) retention. Cotton fleahoppers will be of primary concern during the early squaring fruit-set stage. Adult fleahoppers are pale green in color, oval shaped and about 1/8 inch long. Adult fleahoppers are quick to fly short distances once plants are disturbed. Nymphs are also pale green to greenish in color and they move fast within the plant canopy.

Both adults and nymphs can cause injury by feeding on young terminals and pin-head squares, using their needle-like piercing-sucking mouthparts. Fleahoppers can cause small squares to die off and turn brown, resulting in a “blasted” appearance. If squares have already fallen off, a resulting scar will be evident at those fruiting positions.

Start sampling for cotton fleahoppers when cotton is at the early squaring and continue until first flowering. Whole-plant visual sampling and/or drop cloth methods are appropriate for the plants at this stage. Sample every 5 to 7 days, but under heavy infestations this sampling interval should be lowered to 3 to 4 days. Besides counting the number of fleahoppers (both adults and nymphs), estimate crop growth stage and percent square set during each sampling effort. Sweep nets can also be used to sample fleahoppers, but it may be harsh on the young tender cotton plants.

The 3 following pieces of information are required to determine the threshold for cotton fleahoppers and decide when to initiate control measures:

  1. Number of fleahoppers per 100 terminals.
  2. Crop growth stage.
  3. Percent square set.

For west Texas cotton, use the following economic thresholds:

  • On the FIRST week of squaring, 25-30 fleahoppers/100 terminals and less than 90 percent square set.
  • On the SECOND week of squaring, 25-30 fleahoppers/100 terminals and less than 85 percent of square set.
  • On the THIRD week of squaring to firstbloom, 25-30 fleahoppers/100 terminals and less than 75 percent square set.

As soon as our crops become more established and recover somewhat from weather or insect-related issues, accelerated plant growth and fruiting development should be possible due to good soil moisture availability following our recent rains.

Don’t hesitate to reach me at Apurba.Barman@ag.tamu.edu or 806-407-2830 (cell) regarding any cotton insect related questions.

Source: Focus On South Plains Agriculture, Texas A&M

Owen Taylor
By Apurba Barman, Entomologist, Texas A&M AgriLife Extension June 20, 2014