Agfax Buzz:
    May 9, 2012
    150px_cotton_row_defoliated_bolls_mature_040920_066

    Louisiana Cotton: Western Flower Thrips Pressure – Control Options Weighed

    AgFax.Com - Your Online Ag News Source

    By Owen Taylor, Editor

    Heavy populations of western flower thrips (WFT) have been mixed into general thrips infestations in Louisiana cotton this season. Entomologists have been running a series of evaluations of both older, established products and Radiant.

    We talked late Tuesday afternoon about thrips control options with David Kerns, Associate Professor of Entomology at the Macon Ridge REC, and Sebe Brown, the state’s Northeast Region Extension Entomologist.

    Based on plot evaluations, they said:

    Radiant provided about 90% control 4 days after treatment (DAT). “In our tests we did not see any appreciable difference between the 1.5 ounce/acre rate and the 3-ounce rate,” said Kerns.

    “A 1.5-ounce rate of Radian runs $8 an acre, which is hard for many producers to swallow,” said Brown. “A lot of them want to use Bidrin or Dimethoate, but with high numbers of WFT, we don’t think it’s giving as much control as might be needed, especially Dimethoate.”

    Kerns said that results with Dimethoate were “disappointing.”

    “A lot of these are WFT, half or more of the populations, and we’re not picking up enough of them,” Kerns added. “We looked at both the 4 ounce/acre standard shot and then doubled the rate to 8 ounces, and neither looked that good.”

    Control with Radiant was 90% 4 DAT, Kerns said. Additionally, Kerns noted, Radiant should be applied with “a good non-ionic surfactant or MSO.”

    Acephate at a half-pound/acre rate also is giving about 90% control 4 DAT, he said.

     

    “Bidrin doesn’t deliver quite as much control, but with the first shot it’s usually sufficient where cotton is just coming out of the ground and plants don’t have a lot of colony development,” Kerns added.

    In the Radiant plots there appeared to be more very small immatures present in the samples, Kerns said, “which may indicate that that product may be breaking a little sooner than a half-pound of acephate.”

    Radiant, though, is softer on beneficials, they both pointed out.

    “We’re already picking up spider mites, plus aphids are out there, too,” Brown reported. “If we go with acephate, that could blow up spider mites.”

    None of the products will deliver better than 95% control, so that will leave some lingering numbers. And based on thrips populations being found on a wide basis, more will find their way into fields after treatments. WFT also feed on spider mite eggs, so the presence of a few WFT can help suppress mite populations, they pointed out

    Tags: ,

    2 Responses to Louisiana Cotton: Western Flower Thrips Pressure – Control Options Weighed

    1. Roger Carter says:

      This article came back in a 2″ wide column. I had to copy and paste to word to make it printable and keepable. It is time for me to retire. This new “way” of communicating will cause me to have another stroke. Nothing is standard anymore. Cannot save information as I once did without cutting and pasting each separate article. Terribly time consuming for this end-user. Will drop sources in the future that do not send usable form of information.

    Leave a Reply

    Name and Email Address are required fields. Your email will not be published or shared with third parties.

    Agfax Cotton News

    Shurley On Cotton: NCC Planting Intentions Could Sway Market1-25

    Rose On Cotton: Profitability In ’15? The “Ifs” Must Line Up Right.1-24

    Cleveland on Cotton: World Plantings Need Reduction. How Much?1-23

    Missouri: Insect Management Guide, Resistence Research1-23

    Texas Ag Forum, Austin, Feb. 201-23

    AFB Cotton Close: Futures Chart bearish Key Reversal1-23

    DTN Cotton Close: Reverses to Finish on New Low1-23

    Arkansas: Irrigation Expo Slated for Feb. 25 at Stuttgart1-23

    DTN Cotton Open: Hits New Session Highs on Robust Sales1-23

    Georgia: Heavy Rainfall, Drought Tested Farmers in 20141-23

    Alabama: Wiregrass Cotton Expo Scheduled Feb. 6 at Dothan1-23

    Arkansas: ASU’s Agribusiness Conference Slated Feb. 11 in Jonesboro1-23

    Keith Good: World Grain Inventories Headed for Highest in 30 Years1-23

    Doane Cotton Close: New Sales Continue to Drive Bearish Drop1-22

    DTN Cotton Close: Settles Modestly Lower1-22

    AFB Cotton Close: Futures Lower in Narrow Trade1-22

    Residential Propane Price Increases, Heating Oil Declines1-22

    Propane Stocks Fall Over 3M Barrels1-22

    Gasoline Prices Continue Downward1-22

    Farming and Bankruptcy – 9 Lessons You Need to Know1-22

    Diesel Drops Below $31-22

    Louisiana: Cover Crop Benefits and Management Options1-22

    Old World Bollworm Coming Soon to U.S. Mainland — DTN1-22

    Cotton: Monsanto’s New Herbicide Tolerant Variety Approved1-22

    DTN Cotton Open: Futures Start Just Above Unchanged1-22

    Tennessee Cotton: UT’s XtendFlex Variety Trials Data Available1-22

    Keith Good: U.S. Sorghum Demand Spikes as China Imports Increase1-22

    AFB Cotton Close: Higher in Narrow Range1-21

    Ag Policy: Trade May Be Only Bright Spot in 2015 Politics – DTN1-21

    Doane Cotton Close: Low Volume, Thin Trade1-21

    DTN Cotton Close: Edges Higher in Old-Crop Deliveries1-21

    Texas Crop Weather: Cotton Harvest Wrap-Up Delayed by Wet Weather1-21

    Row Crop Margin Squeeze: 12 Strategies To Help You Survive1-21

    DTN Cotton Open: Futures Start Slightly Higher1-21

    Family Farm Bankruptcy Clarification Act – 2 Important Points for Hard Times1-21

    Keith Good: Midwest Grain Farmers Brace for Big Losses in 20151-21

    Farmland Values Still Historically High in the Longterm – Regional Report1-20

    DTN Fertilizer Trends: Prices Edge Higher1-20

    AFB Cotton Close: The Bottom Falls Out1-20

    Farm Taxes: Bill to Eliminate Capital Gains from Post-Bankruptcy Sales – DTN1-20