Tuesday, August 20, 2013
corn-earworm-soybeans-07272012-featured

Virginia Soybeans: Insect Pests and Fungicide Choices

AgFax.Com - Your Online Ag News Source


I would like to address some very key issues that I seem to be getting the most calls about in the last few days. That is soybean insects and fungicide choices. We have over 34,000 acres of soybeans in the county this year, surpassing cotton acreage for the first time in a few years.

The question I get is “should I spray a fungicide and if so, what product do I use?” The next question that usually follows is “what is the moth count, when should I spray for worms?”

Soybeans have been shown to respond well to fungicide applications in a year where conditions produce heavy disease pressure. There are some years where a fungicide application will not pay for itself. This year we have obviously had far more rainfall than normal for this area.

Full season beans have lush, dense canopies that create moist, humid environments ripe for disease development. This may be a year to strongly consider a fungicide application at R3-R5 stage in your soybeans. Dr. Phipps’s research has shown that a strobilurin fungicide or strobilurin/triazole premix shows the best results over many trials.

The following list is the top performing products based upon trial work at TAREC.

  • Headline (pyraclostrobin)
  • Quadris (azoxystrobin)
  • Stratego YLD (trifloxystrobin + prothioconazole)
  • Priaxor (pyraclostrobin + fluxapyroxad)
  • Quilt Xcel (azoxystrobin + propiconazole)
  • Quadris Top (azoxystrobin + difenconazole)

As far as insects go for soybeans, the moth counts and worm pressure have been variable. I have swept many fields without finding threshold while there are reports of corn earworm threshold being reached in other areas just to our south and northwest. Basically, if you are at threshold (about 1-2 worms per 15 sweeps) a pyrethroid at the highest labeled rate should do the trick.

If you are at two to three times threshold or have other worm species (beet armyworm, fall armyworm, tobacco budworm) you need to use a non pyrethroid like Belt, Steward, Prevathon, or Besiege. Please scout and treat fields accordingly using sound IPM guidelines.

Also, be aware of stinkbug and kudzu populations when making worm sprays to make sure you choose a product or combination of ingredients to control the insect complex in YOUR field, not the neighbor’s.


Tags: , , , , , , , , ,


Leave a Reply

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

Sunbelt Ag News

    DTN Cotton Open: Slightly Higher on Light Volume10-24

    DTN Livestock Open: Cash Cattle Values Surge10-24

    DTN Grain Open: Futures Extend Gains10-24

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

    Grain TV: Soybean Exports Double Expectations10-23

    AFB Grain-Soybean Close: Sharp Gains See New Highs10-23

    AFB Cotton Close: Dec. Moves Higher10-23

    AFB Rice Close: Sharply Lower Under Heavy Pressure10-23

    Livestock: Country Of Origin Labeling Debate Marches On – DTN10-23

    DTN Livestock Close: Cattle Futures Higher10-23

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

    Small Scale Organic Farming a Good Way to Branch into Ag – DTN10-23

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

    DTN Grain Close: Futures Make New Highs10-23

    DTN Livestock Midday: Cattle Futures Hold Narrow Gains10-23

    U.S. Grain Transportation: Higher Soybean Shipment Boosts Inspections10-23

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

    DTN Grain Midday: Soybean Futures Climb 15 Higher10-23

    Ethanol Production Profits Hit the Wall — Why Did it Happen?10-23

    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

    Alabama: Recent Weather Radar Oddity Was Mayfly Swarm10-22

    Soybean Harvest: Prioritize Shatter-Prone Fields – DTN10-22

    Ethanol: Court Tosses E15 Labeling Lawsuit – DTN10-22

    Georgia: 2 Counties Declared Natural Disaster Areas10-22

    Arkansas: 2 Counties Designated Natural Disaster Areas10-22

    AgFax Grain Review: More Lawsuits Against Syngenta; Harvest Well Behind Pace10-22

    2 Families, 2 Approaches to Building Ranch Tourism — DTN10-22

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

    National Cotton Council Commends Timely APH Announcement10-22

    Wheat Growers to Seek Inclusion in APH Yield Exclusion for 2015 – DTN10-21

    Farm Shop Dream Requires Thoughtful Planning – DTN10-21

    USDA: Weekly National Peanut Prices10-21

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

    Arkansas: USA Rice Outlook Conference Set Dec. 7-9 in Little Rock10-21

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

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

    Herbicide Resistant Weed Summit’s Slides, Webcast Available Online10-20

    Rice and Sugar: Thailand’s Quest for World Domination10-20

    AgFax Peanut Review: NM Down 6M Pounds as State Celebrates 100 Year Crop10-20

    Livestock: WTO Rules Against U.S. in COOL Dispute — DTN10-20

    Wheat Scientists, Breeders Advocate Biotech Crop — DTN10-20

    Good on Grain: Storage Issues May be Less Severe Than Anticipated10-20

    Brazil Soybeans: Planting Falls Further Behind — DTN10-20

    Flint on Crops: Cover Crops Provide Many Benefits10-20

    New Holland Combine Sets Guinness Harvest Record10-18

    Sunbelt Ag Events

     

    About Us

    AgFax.Com covers agricultural trends and production topics, with an emphasis on news about cotton, rice, peanuts, corn, soybeans, wheat and tree crops, including almonds, pecans, walnuts and pistachios.

      

    This site also serves as the on-line presence of electronic crop and pest reports published by AgFax Media LLC (formerly Looking South Communications).

        

    Click here to subscribe to our free reports.

      

    We provide early warnings and confirmations about pests, diseases and other factors that influence yield. Our goal is to quickly provide farmers and crop advisors with information needed to make better and more profitable decisions.

         

    Our free weekly crop and pest advisories include:

    • AgFax Midsouth Cotton, covering cotton production and news in Alabama, Arkansas, Louisiana, Mississippi, Tennessee and Missouri.

    • AgFax Southeast Cotton, covering cotton production and news in Alabama, Florida, Georgia, North Carolina, South Carolina and Virginia.

    • AgFax Southwest Cotton (new for 2013!), covering cotton production and news in Texas, Oklahoma, Kansas and New Mexico.

    • AgFax West (formerly MiteFax: SJV Cotton), covering California cotton, alfalfa, tomatoes and other non-permanent crops in California's Central Valley.

    • AgFax Rice covering rice production and news in Arkansas, Louisiana, Mississippi, Missouri and Texas.

    • AgFax Peanuts, covering peanut production in Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Texas and Virginia.

    • AgFax Southern Grain: covering soybeans, corn, milo and small grains in Southern states.

    • AgFax Almonds, covering almonds, pistachios, walnuts and other tree crops in California's Central Valley.

    • AgCom 101, providing guidance to ag professionals involved in social media.

    Our newsletters are sponsored by the following companies: FMC Corporation Chemtura Dow AgroSciences.

          

    Mission statement:

    Make it as easy as possible for our community of readers to find and/or receive needed information.

              

    Contact Information:

    AgFax Media. LLC

    142 Westlake Drive Brandon, MS 39047

    601-992-9488 Office 601-992-3503 Fax

    Owen Taylor Debra L. Ferguson Laurie Courtney

          

    Circulation Questions?

    Contact Laurie Courtney