Agfax Buzz:
    May 15, 2013
    ms_grain_sorghum

    Texas Grain Sorghum: Early Fields Reaching Midge Scouting Period

    AgFax.Com - Your Online Ag News Source

    By Stephen Biles, Extension Agent-IPM, Texas A&M AgriLife, Port Lavaca

    Earlier fields of sorghum are heading and beginning to bloom. So, it is time to start looking for sorghum midge on the field margins.

    CLICK TABLE TO ENLARGE: Sorghum Midge per flowering head

    CLICK TABLE TO ENLARGE: Sorghum Midge per flowering head

    The adult sorghum midge is a small (less than 1/8 inch), orange-red fly with a yellow head, brown antennae and legs and gray, membranous wings.

    Scout fields in the morning when the temperature warms to approximately 85° F. Because adult sorghum midges live less than 1 day, each day a new brood of adults emerges. Sampling must be done almost daily during the time sorghum grain heads are flowering.

    Sorghum midge adults can be seen crawling on or flying about flowering sorghum grain heads. The simplest and most efficient way to detect and count sorghum midges is to inspect carefully and at close range all sides of randomly selected flowering grain heads.

    Inspect plants along field borders first; particularly those downwind of earlier flowering sorghum or johnsongrass. If no, or few, sorghum midges are found on sorghum grain heads along field edges, there should be little need to sample the entire field. If you find more than one sorghum midge per flowering grain head in border areas of a sorghum field, inspect the rest of the field. Sample at least 20 flowering grain heads for every 20 acres in a field.

    For fields smaller than 20 acres, sample 40 flowering grain heads.

    Sorghum Headworm Calculator: We have added a calculator to the Entomology Website to calculate the economic threshold of sorghum headworms. We are hoping to add midge and stinkbugs to this calculator soon. https://insects.tamu.edu/extension/apps/sorghumheadwormcalculator/

    Tags:

    Leave a Reply

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 Your email will not be published or shared with third parties.

    Agfax Cotton News

    Doane Cotton Close: Acreage May Not Drop, Market Turns Negative3-4

    Kansas: Sumner County a Primary Natural Disaster Area3-4

    Arizona: 4 Counties Declared Natural Disaster Areas3-4

    Oil Exports Reach Record High3-4

    New Mexico: 9 Counties Designated Natural Disaster Areas3-4

    California: Imperial County Designated a Natural Disaster Area3-4

    DTN Cotton Close: Record High Ending Stocks Outside China3-4

    Propane Stocks Decrease3-4

    Gas Prices Skyrocket3-4

    Diesel Prices on the Rise3-4

    Tennessee: Almost Time for Burndown Applications3-4

    DTN Cotton Open: Sales Dip, All Eyes on China3-4

    Doane Cotton Close: Lower Global Demand Expectations3-3

    New Videos Shows Weeds Time-Lapsed Reaction to Herbicides3-3

    DTN Fertilizer Trends: Northern Farmers Glad for Lack of Delays3-3

    Texas: Drought Outlook Is Positive for Next 2 Decades3-3

    DTN Cotton Close: India Sales Insignificant3-3

    North Carolina: Farming on Leased Land Workshop, Mills River, April 93-3

    Cotton: Topguard Gets Full Registration, Pay Attention to Use Rates3-3

    DTN Cotton Open: Coils Quietly Near Lows3-3

    Fertilizer Management: Watch Out for Burns from In-Furrow Starters – DTN3-2

    Keith Good: Ethanol Profits; California Rains – Just Drop in the Drought Bucket3-2

    Herbicide-Resistance: 12 Steps to Keep Weeds Away3-2

    AFB Cotton Close: Slightly Mixed3-2

    Doane Cotton Close: Market Follows Stock Exchange3-2

    DTN Cotton Close: Winter Weather Impedes Field Work3-2

    DTN Fertilizer Outlook: Harsh Winter to Keep Prices Flat3-2

    Texas Cotton: Root-Knot Nematodes – Resistant Varieties, Early Season Management3-2

    DTN Cotton Open: Cash Grower Sales Slump3-2

    Keith Good: Crop Insurance Guarantees to Fall; California Drought “Catastrophic”;3-2

    Rose on Cotton: Gin Show Visit – High Quality Cotton Still in Demand2-28

    AFB Cotton Close: Selling Continues with Wide Range2-27

    Doane Cotton Close: Technical Selling, Profit-Taking Weigh on Market2-27

    Cotton Base Acres Count as Generic Base Under Farm Bill2-27

    DTN Cotton Close: Texas Could See More Freezing Rain, Snow2-27

    Shurley on Cotton: Improvement Slows Down, but What Else Did We Expect?2-27

    Weekly Cotton Market Review – USDA2-27

    Arkansas Cotton: Acreage, Infrastructure Slip Away with Weaker Demand2-27

    Keith Good: Chinese Corn Imports Not Likely to Recover; Food Stamp Debate Rages On2-27

    USDA Changes Deadline: Yield History Update, Reallocation Base Now Due March 312-27