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

    Alabama: Website Created to Help Navigate Farm Bill9-2

    DTN Cotton Open: Tumbles to Five-Session Low9-2

    South Carolina: Crop Production Field Day Set Sept. 25 at Blackville9-2

    Keith Good: Rail Service Problems Persist; Hog Prices Rebounding9-2

    Texas Cotton Industry Mourns The Death Of Economist Carl Anderson9-1

    China Cotton: Reserves’ Quantity, Quality Cause Problems – DTN9-1

    Keith Good: Production Costs Out of Balance with Expected Revenues9-1

    Flint on Crops: Rain Is Better Than Well Water9-1

    California Cotton: Defoliation Just Around The Corner – AgFax8-31

    California Cotton: Managing Late Pests, Preventing Sticky Problems8-31

    Texas Cotton: Managing Late Fields – Hale And Swisher Counties8-30

    California Cotton: Late-Season Symptoms – Should You Worry?8-30

    Rose on Cotton: Plenty of Gaps and No Rallies Expected8-29

    California Cotton: West Side Field Day Set For September 118-29

    Cleveland on Cotton: Chinese Demand Pulling Prices Higher8-29

    Doane Cotton Close: Futures Unable to Recover Losses8-29

    Mississippi Cotton: When to Terminate Bollworm Sprays in Late Bt Fields8-29

    DTN Cotton Close: Late Rally Leaves Dec. Flat8-29

    AFB Cotton Close: Dec. Moves Fractionally Lower8-29

    Farm Bill: Cotton Transition Assistance Enrollment Now Open8-29

    Mississippi Cotton: Healthy Crop Tempered by Slumping Prices8-29

    DTN Cotton Open: Extends Prior-Session Loss8-29

    Farm Payments to Stakeholders Rise as Gov. Payments Decline – USDA8-29

    Young Farmer in Your Future? – Helping Him or Her is Key to Success. – DTN8-29

    Tennessee Cotton: Cool Temperatures Set Crop Back8-29

    Net Farm Income Forecast to Fall,10.6% Decline Crop Value – USDA8-29

    Keith Good: Corn, Soybean Farmers May Face Financial Pinch in 20158-29

    AFB Cotton Close: Market Turns Lower8-28

    Doane Cotton Close: News from China Moves Market Lower8-28

    Missouri: Moth Trap Data for Bootheel Pests8-28

    Alabama: Pesticide Clean Days, Sept. 3-48-28

    Oklahoma: Peanut and Cotton Field Tour, Fort Cobb, Sept. 238-28

    Oklahoma: Fall Cotton Tour, Hydro, Sept. 118-28

    North Carolina Cotton: Bollworms Developing in Bt Fields8-28

    Farm Drones Under Scrutiny: Farmers Impatient for FAA Ruling – DTN8-28

    DTN Cotton Close: Settles at 3 Session Low8-28

    Georgia Cotton: Boll-Feeding Insects on the Prowl8-28

    John Deere Lays Off 460 from Waterloo, Iowa Factory8-28