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: Looking for the Positives This Week11-21

    Cleveland on Cotton: 57 Cents – ‘The Bottom is In’11-21

    Ag Labor: Immigration Order Provides Little Long-Term Benefit – DTN11-21

    Doane Cotton Close: Decline in Chinese Production Offers Support11-21

    AFB Cotton Close: Futures Rebound11-21

    DTN Cotton Close: Settles Higher on Light Volume11-21

    Ag Policy: Farm Bills Need Long-Term View11-21

    Cotton Market Weekly Review by Region11-21

    Arkansas Corn: Growers Investing in On-Farm Storage11-21

    DTN Cotton Open: Trades Higher after No Notices Issued11-21

    Mississippi: 7 Farm Bill Workshops Slated for December11-21

    Vilsack: Immigration Order Creates ‘Stability’ in Ag Work Force — DTN11-21

    Keith Good: What’s Next for Meat Labeling?; Sugar Prices Take Tumble11-21

    Texas Cotton Harvest – Still Some To Go – AgFax11-20

    Doane Cotton Close: Exports Continue Well Ahead of Pace11-20

    Mississippi: Water Conservation Summit, Stoneville, Dec. 1011-20

    Farm Internet Service Still Slow or Non-Existent, But Improving – DTN11-20

    AFB Cotton Close: Futures See Renewed Pressure11-20

    DTN Cotton Close: Dec. Hits 5-Year Low11-20

    U.S. Drought Outlook: Improvements Expected for California, Southwest11-20

    DTN Cotton Open: Slips to Slight Losses11-20

    U.S. Energy: Planned Refinery Maintenance Light in 201411-20

    Propane Stocks: Post Slight Increase11-20

    Gasoline Prices: Decrease by 5 Cents11-20

    Diesel Prices: Average Drops 2 Cents11-20

    Keith Good: Weather Brings Close to Upper Mississippi Shipping Season11-20

    California Crops: Yield Survey Reports On Cotton, Alfalfa And Tomatoes – AgFax11-19

    AFB Cotton Close: Unable to Break 60 Cent Resistance11-19

    Doane Cotton Close: Price Leak Continues11-19

    Farm Runoff Targeted for Regulation Following Algal Bloom Shutdown – DTN11-19

    DTN Cotton Close: Gives Back March Gains11-19

    Georgia: Diesel Prices Lowest in 4 Years11-19

    DTN Cotton Open: Futures Meander Slightly Lower11-19

    Keith Good: Farm Industry Divided over Immigration Executive Order11-19

    Farm Bill Commodity Program: Decisions and More Decisions11-18

    Doane Cotton Close: Further Price Erosion Likely11-18

    AFB Cotton Close: Futures Recover Slightly11-18

    Young Farmers: USDA is the ‘Lender of 1st Opportunity’ – DTN11-18

    DTN Cotton Close: Finishes Near Day’s Highs11-18

    Tax Extenders: Farm Groups Push Congress to Renew Section 179 This Year – DTN11-18