Friday, May 16, 2014
kudzu_bug_florida

Alabama Soybeans: Kudzu Bug Control – FAQ

AgFax.Com - Your Online Ag News Source


First recognized as a nuisance pest when discovered in Georgia during the fall of 2009, the kudzu bug has since become a serious pest of soybeans. Initial reports indicated that this invasive insect is capable of reducing soybean yields by nearly 60%. Yield loss due to kudzu bug feeding has been observed to reduce pod size, seeds per pod, and seed weight.

Control of the kudzu bug in agricultural settings is possible and begins with proper insect identification, attention to economic thresholds, and timing of chemical treatments. As this insect begins to migrate to soybean in the coming the months, below are a few frequently asked questions concerning kudzu bug control in soybeans.

 

Where do kudzu bugs tend to aggregate initially in soybean fields? When kudzu bugs first encounter a soybean field, they will aggregate abundantly on the outside rows, or edges of the field. As the season progresses they will move toward the center of the field.

When will I find kudzu bugs in soybean fields? Adults have been observed entering soybean fields as early as May in South Carolina (V1-V3 growth stage). Once adult insects are observed in fields, they will persist there throughout the growing season. Nymphs are normally first encountered in June and last through September.

What is the recommended scouting technique? Sweep netting (15″ diameter net) or visual inspections of the crop are the proper scouting techniques. Make sure to sample the entire field and not just crop borders or edges.

Do kudzu bugs reduce plant height when they infest seedling soybeans in large numbers? Yes, kudzu bugs feed on plant sap and thus reduce the amount of nutrients flowing through the plant. This will reduce the plants vigor.

How will kudzu bug feeding affect soybean plants? Kudzu bugs feed by inserting their mouthparts into the plant stems, and they will suck up plant sap. This removes vital nutrients from the plants, reduces plant vigor, can cause leaf drop, reduction in crop yields and seed size, necrotic stem lesions, and can induce growth of black sooty mold leading to various secondary plant problems.

Are early season soybeans more susceptible to kudzu bug infestation? Field observations show that kudzu bug numbers tend to be greater in early-plant soybeans than in later planted soybeans.

Do all pyrethroids provide at least 80% control shortly after application? Not all, but many pyrethroids provide high mortality after application, usually 2-5 days after treatment. Pyrethroids that initially give 80% control or better of kudzu bugs include products containing bifenthrin (Brigade, Discipline, Fanfare), gamma-cyhalothrin (Declare), lambda-cyhalothrin (Karate Zeon, Silencer), and zeta-cypermethrin (Mustang Max). Additionally, carbaryl (Sevin) and acephate (Orthene 97) also initially give better than 80% control of kudzu bugs.

How and when should I treat my field? The Alabama Pest Management Handbook (2014) recommends treating fields before first bloom when kudzu bugs reach a density of 5 adults per plant across the entire field. The suggested treatment threshold once plants begin to bloom is 10 adults per sweep net sweeping across two rows, or when one nymph per sweep is collected. If immature kudzu bugs are easily and repeatedly found on petioles and main stems during visual inspections of the canopy, treatment is likely warranted.

Border row applications of recommended insecticides have, in some cases, slowed the movement of the kudzu bugs into the center of fields. However, re-application of insecticides may be needed if applied before or during kudzu bug migration into soybean fields. Kudzu bugs continued to migrate into soybean fields at Prattville, AL through the third week of July in 2013. Make sure insecticide applications thoroughly penetrate the canopy as these insects feed on the stems and petioles of the plant.

Are adults or nymphs more susceptible to chemical treatment? Both adults and nymphs are susceptible to insecticides.

Will one application of an effective insecticide provide season long control when applied at least one month after soybeans emerge? No, these insects will migrate into soybean fields from other feeding sites, and their migration to fields may last as long as two-to-three months. You should only apply an insecticide in response to a kudzu bug infestation when the pest density reaches the economic threshold. When treating multiple times make sure to change the insecticide and the active ingredient to prevent insecticide resistance.

When do populations peak in soybean fields? Adult and nymphal peaks are usually seen in September (corresponding to ~R5), while eggs tend to peak in August (~R2).

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

    Crop Tech: Orange Corn; BT-Soybeans; Frozen Oats – DTN10-31

    Production Costs Slow to Realign with Markets – DTN10-31

    Crop Insurance: 3rd Option for Crop Payment Yield Update10-31

    DTN Cotton Close: Mixed After Late Rally10-31

    Mississippi Wildlife: Responsible Hunting Maintains Future Populations10-31

    DTN Grain Close: Soybean Complex Ends Week Higher10-31

    Mississippi Pecans: Off Year May Impact Holiday Volume10-31

    USDA: Peanut Price Highlights10-31

    Georgia Pecans: Good Demand, Lighter Crop Expected10-31

    Four States Cattle Conference Set Dec. 10 in Texarkana, Ark.10-31

    DTN Livestock Midday: Live Cattle Contracts Shift Lower10-31

    DTN Grain Midday: Corn, Wheat Trading Lower10-31

    AgFax Wildlife Review: Wild Hogs Could Put Scare in Trick-or-Treaters10-31

    DTN Cotton Open: Futures Dip Near Session Low10-31

    DTN Dried Distillers Grain: No Rally in Prices Expected10-31

    DTN Livestock Open: Cattle Contracts to Begin Firm10-31

    North Carolina: Irrigation Conference Slated Nov. 6 in Raleigh10-31

    DTN Grain Open: Soybeans Start Out Higher10-31

    Keith Good: Turkey Investigates U.S. Cotton Imports, Demand May Suffer10-31

    Grain TV: Markets Hit by Selling Pressure10-30

    DTN Livestock Close: Cattle Complex Enjoys Short-Covering Rally10-30

    Doane Cotton Close: Strong Exports Continue10-30

    ELS Cotton Competitive Payment Rate Is Zero10-30

    AFB Grain-Soybean Close: Strong Exports Unable to Support Prices10-30

    AFB Cotton Close: Futures Retrace Gains10-30

    AFB Rice Close: Futures Turn Strongly Lower10-30

    Biodiesel: 2014 A Tough Year for Producers10-30

    Kansas Officials Point Out Flaws in Clean Water Act – DTN10-30

    Future Farmers Face Major Challenges, Ag Sec Tells FFA – DTN10-30

    U.S. Grain Transportation: Barge Rates Remain Well Above Average10-30

    Mississippi: Fall Tests for Nematodes Help Keep Crops Healthy10-30

    California’s SJV Included in Report on Soil Loss to Salt Damage10-30

    U.S. Energy: Gas Prices Drop to Lowest Since December 201010-30

    Gasoline Prices: Average Drops 6 Cents10-30

    Propane Stocks: Down 1.3M Barrels10-30

    Diesel Prices: Decrease by 2 Cents10-30

    New Research Study Shows the Value of Neonics10-30

    Texas: Pecos County Pesticide Workshop, Fort Stockton, Nov. 1810-29

    Florida: Sugarcane Field Day, Quincy, Nov. 310-29

    Texas Wildlife: New Deer Management App Just in Time for Deer Season10-29

    Peanut Stocks: Utilization Up 6%, Stocks Total 1.2B Pounds10-29

    Texas Pecans: Fairly Light Deliveries, Good Demand10-29

    Louisiana Pecans: Deliveries Insufficient to Establish Prices10-29

    Georgia: Brooks County Clean Day Rescheduled to Nov. 1210-29

    AgFax Cotton Review: U.S.’s High Quality Offers Market Resilience10-29

    Georgia: USDA Designates Early County Primary Natural Disaster Area10-29

    Why Chinese Consumers Pay More for Non-GMO Soy Oil – DTN10-29

    DTN Fertilizer Outlook: Demand May Fall with Crop Prices10-29

    Grain Math – Can you Pass the Test? – DTN10-29

    Welch on Wheat: Crop Condition Right on Average10-28

    Welch on Grain: Corn Harvest Runs Behind but Conditions Remain High10-28

    USDA: Weekly National Peanut Prices10-28

    Mississippi Wild Hogs: Trapping Is the Best Control Method10-28

    DTN Fertilizer Trends: Stubborn Prices Pose Dilemma for Grain Farmers10-28

    Corn Prices: How Do You Handle a Nervous Market? — DTN10-28

    Georgia Peanuts: Spider Mite Damage Rises in Dry Weather10-28

    Vilsack: COOL Appeal Decision to be Made in January — DTN10-27

    Livestock: Record Cattle Prices, Again and Again10-27

    AgFax Rice Review: Defense Against Arsenic; Japan’s Modernization10-27

    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