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

    Rose on Cotton: Increased Export Competition with India10-24

    Georgia Cotton: Harvest Chugs Along, Yields Mostly Good10-24

    Doane Cotton Close: Strong Stock Market Keeps Prices Up10-24

    AFB Cotton Close: Higher in Middle of Day’s Range10-24

    DTN Cotton Close: Jumps Ahead as Volume Improves10-24

    Cleveland on Cotton: Market Keeps Spinning the Same Record10-24

    Farm Finances: Prepare Now for Rising Interest Rates – DTN10-24

    Georgia: Museum of Agriculture Is Fun and Educational10-24

    Arkansas: Series of Farm Bill Workshops Set Across State10-24

    DTN Cotton Open: Slightly Higher on Light Volume10-24

    Keith Good: EPA’s Water Rule Approved by Internal Review Board10-24

    AFB Cotton Close: Dec. Moves Higher10-23

    Doane Cotton Close: Prices Boosted by Stock Market Strength10-23

    DTN Cotton Close: Settles Mixed as Dec. Rallies10-23

    Advances in Farming Technology Continue to Aid Mother Nature — DTN10-23

    DTN Cotton Open: Slides Lower within Tight Ranges10-23

    U.S. Energy: Crude Exports, Re-Exports Continue to Rise10-23

    Gasoline Prices: Show 9-Cent Decrease10-23

    Propane Stocks: Increase by 0.2M Barrels10-23

    Diesel Prices: Average Drops 4 Cents10-23

    Keith Good: EPA’s Approval of Enlist Duo Herbicide Challenged by Suit10-23

    Doane Cotton Close: No New Fundamental News10-22

    AFB Cotton Close: Inside Day Turns Negative10-22

    Georgia: 2 Counties Declared Natural Disaster Areas10-22

    Arkansas: 2 Counties Designated Natural Disaster Areas10-22

    DTN Cotton Close: Mixed on Light Volume10-22

    Don’t Just Piggy-Back on Others’ Prices in Ag Commodity Markets10-22

    DTN Cotton Open: Higher in Subdued Dealings10-22

    National Cotton Council Commends Timely APH Announcement10-22

    Keith Good: APH Yield Exclusion Implementation Draws Praise — Mostly10-22

    Doane Cotton Close: Positive Chinese Economy Boosts Prices10-21

    Farm Shop Dream Requires Thoughtful Planning – DTN10-21

    DTN Cotton Close: Snaps String of Five Lower Finishes10-21

    Texas Crop Weather: El Niño Stalled Out but Cool, Wet Winter Still Predicted10-21

    USDA to Implement APH Yield Exclusion for 2015 Spring Crops10-21

    AgFax Cotton Review: Lower Acres May Close Mill; Australia Acres Up10-21

    DTN Cotton Open: Near Unchanged in Tight Ranges10-21

    DTN Fertilizer Trends: High Costs May Alter Growers’ Tactics for 201510-21

    Keith Good: Tumbling Grain Prices May Prove Costly for Taxpayers10-21

    AFB Cotton Close: Selling Accelerates10-20