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

    AFB Cotton Close: Dec. Posts Losses but Maintains Support9-18

    Tennessee: Cotton Yield Monitoring with the Case-IH and Deere Pickers9-18

    DTN Cotton Close: Slips to 8 Session Low9-18

    Most Farmers Willing to Take More Steps to Improve Water Quality, Says Study9-18

    U.S. Drought Outlook: Improvements in Texas, Southwest9-18

    DTN Cotton Open: Remains in Red after Sales Data9-18

    U.S. Energy: Shale-Focused Companies’ Financial Performance Improves9-18

    Gasoline Prices: Average Falls 5 Cents9-18

    Propane Stocks: Rise by 1.4M Barrels9-18

    Diesel Prices: Decrease by a Penny9-18

    Keith Good: USDA Approves Use of Dow’s New GMO Corn, Soybeans9-18

    California Cotton Defoliation: Dealing With Whitefly And Variability In 20149-17

    DTN Cotton Close: Ekes Out Marginal Dec. Gains9-17

    42 California Counties Designated Natural Disaster Areas9-17

    DTN Fertilizer Trends: Rabobank Forecasts Higher 3Q Retail Prices9-17

    Cotton in Southwest: Need More Heat; 4-Bale Dryland; Pigweed Plans – AgFax9-17

    DTN Cotton Open: Futures Inch Slightly Higher9-17

    Keith Good: 18.3B Bushels of Corn, Soybeans — Where to Put it All?9-17

    Doane Cotton Close: Renewed Selling on Overhead Resistance9-16

    AFB Cotton Close: Dec. Continues Lower9-16

    DTN Cotton Close: Dec. Settles Modestly Lower9-16

    Texas Crop Weather: From Too Little Rain, to Too Much Rain, Too Early9-16

    Non-Land Production Costs Unlikely to See Much Decline in 20159-16

    Tennessee: Harvest Stalled by Late Week Rains – USDA9-16

    AgFax Cotton Review: Chinese Acreage Declines; Weather Damages Crops in India, Pakistan9-16

    DTN Cotton Open: Slips to Slight Losses9-16

    Mississippi: Cotton Varieties Planted Report Released by USDA9-16

    Keith Good: USDA Rates Corn Crop 74% Good or Excellent, Soybeans 72%9-16

    Texas: Corn Harvest Begins to Wind Down – USDA9-15

    Oklahoma: Small Grain Planting Underway – USDA9-15

    California: Rice Harvest Begins in Record Heat – USDA9-15

    Alabama: Scattered Showers Provide Minor Benefit to Mature Crops – USDA9-15

    South Carolina: Corn, Tobacco Harvests Wind Down as Rains Improve Crops – USDA9-15

    Georgia: Rains Help Crops, Soybean Harvest Begins – USDA9-15

    Mississippi: Corn Harvest Winding Down, Soybean Harvest in Full Swing – USDA9-15

    Arkansas: Rains Slow Harvest, Corn Yields Look Good – USDA9-15

    North Carolina: Corn Harvest Half Finished as Rains Delay Field Work – USDA9-15

    Florida: Peanut Harvest Begins – USDA9-15

    Doane Cotton Close: Post-Report Strength Wanes9-15

    Kansas: Harvest Underway with Light Frosts – USDA9-15