Agfax Buzz:
    August 24, 2013
    cotton-bollworm-scott-steward-07272012-feature

    Texas Cotton: Bollworms Still Bear Watching In Hale, Swisher Counties

    AgFax.Com - Your Online Ag News Source

    By Blayne Reed, Texas AgriLife, IPM Extension Agent, Hale and Swisher Counties

    Last week’s rains and cooler temperatures slowed much of our area cotton from reaching that absolute cut-out stage (3.5 NAWF) this week. I feel we had done a pretty good job of managing our later planted cotton this season so that most fields were not ‘late.’

    Now there are several cotton fields with varying levels of late concerns. With a typical fall, we should be able to count on an August 24th bloom making a harvestable boll in Hale and Swisher Counties seven out of ten seasons, but not much after that date.

    This makes managing fields at 4 our 5 NAWF this week difficult to manage, especially as our sub-moisture remains short and our September heat unit accumulation is in question. It remains a tightrope act with irrigation – stressing cotton into timely cut-out, avoiding stress that triggers harvestable fruit shed and all the while preventing ‘junk’ fruit production from ruining an otherwise good field.

    Our program fields so far this week have ranged from well cut-out with no new blooms noted to 5.7 NAWF. All fields avoiding recent hail events have a solid boll load ranging from a late field with 2.7 ‘made’ bolls per plant to a finishing up 10.2 ‘made’ bolls per plant.

    Most were reaching absolute cut-out (3.5 NAWF) this week with 5 to 7 ‘made’ bolls per plant. Boll set has been relatively high and later fields have plenty of squares and potential, but limited time.

    Actual field pest pressure remains light, but we remain on alert for multiple pests. For the first week in nearly a month, we had no new fields reach ET (economic threshold) for Lygus. Although several cotton fields remain at risk for Lygus damage many other fields are developing past economic Lygus concerns via heat unit accumulation and boll development. Lygus populations remain very spotty.

    We noted in our blog earlier this week that a suspected large bollworm moth flight had begun and that most moths appeared to be drawn more to our large amount of late corn and sorghum rather than cotton.

    This trend seems to be continuing as the only bollworm eggs we are finding in cotton are not near any corn fields. Our fresh bollworm egg lay ranged from 0 to 8,250 eggs per acre in cotton this week. This remains light by any standard and predators are expected to take a toll on eggs and small worms.

    The ET for bollworms is roughly 10,000 to 12,000 worms (not eggs) per acre, crop stage depending. It is quite likely that some area non-BGII cotton will need to be treated this week or next for a late population of bollworms, matching the still at risk ‘lateness’ of our crop.


    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

    Cleveland on Cotton: Heavy Hat Sitting on 67-68 Cent Mark8-22

    Rose On Cotton: Positive Signs, Mostly8-22

    Cotton In Midsouth – Bollworms Build – AgFax8-22

    Texas Cotton: Hale, Swisher Fields Have Mostly Reached Cut-Out8-22

    AFB Cotton Close: Higher in Narrow Trade8-22

    DTN Cotton Close: October Leads Rally Higher8-22

    Louisiana Cotton: Target Spot Found in Several Parishes8-22

    Mississippi: Cotton Irrigation Termination8-22

    Mississippi: Trap Catches Normal, Expect Moderate Worm Pressure8-22

    Virginia Cotton: First-and-Goal at the 1-Yard Line8-22

    DTN Cotton Open: Slightly Lower in Quiet Dealings8-22

    Keith Good: With Midwest Grain Harvest Looming, Storage Concerns Grow8-22

    AFB Cotton Close: Futures Post Small Gains8-21

    Doane Cotton Close: Technical Strength Could Mark Selling Opportunity8-21

    DTN Cotton Close: Dec. Edges Higher in Mixed Trade8-21

    Georgia: Cotton Set in Thomas County8-21

    U.S. Drought Outlook: Improvement Across Southwest, California Still Dry8-21

    DTN Cotton Open: Edges Higher to Extend Gains8-21

    U.S. Energy: Midland Crude Prices Falling Below Cushing Prices8-21

    Gasoline Prices: Decrease by 3 Cents8-21

    Propane Stocks: Up 2.5M Barrels8-21

    Diesel Prices: Average Drops 1 Cent8-21

    Tennessee: Insect Update — Stink Bugs Building in Soybeans8-21

    North Carolina Cotton: Hyde County Crop in Home Stretch8-21

    Keith Good: Pro Farmer Tour Findings Pressure Corn, Soybean Prices8-21

    Texas Town Claims Oldest Working Cotton Gin – AgFax8-21

    Southeast Cotton – Late Insects Forcing Tough Decisions – AgFax8-20

    Doane Cotton Close: Biggest Day-Gains Since June8-20

    DTN Cotton Close: Market Surges Above Prior 3 Weekly Highs8-20

    The Glory Days Are Gone: Not Your Daddy’s Farm Program – DTN8-20

    Crop Insurance: Commodity Payment Caps and AGI Restrictions – DTN8-20

    AgFax Cotton Review: World Consumption to Rise; Best Texas Yields in 3 Years8-20

    Louisiana: Fertilizer Research Benefits from New Equipment8-20

    Texas Crop Weather: Dog Days of Summer Dry Out Soils8-20

    DTN Cotton Open: Little Changed within Tiny Span8-20

    Keith Good: Indiana Soybean, Corn Yields Likely to Top USDA Forecast8-20

    Cotton in Southwest: Resistant Pigweed Thrives: Aphids Won’t Quit – AgFax8-19

    Doane Cotton Close: Modest Deterioration in Crop Ratings8-19

    DTN Cotton Close: Meanders to Slight Gains8-19

    Tennessee: Dry Weather Persists in South, Stresses Crops – USDA8-19