Cotton Bacterial Blight Update: July 18, 2014 (UPDATED 7/28/2014)

Tom Allen, Extension Plant Pathologist
By Tom Allen, Extension Plant Pathologist and Darrin Dodds, Extension Cotton Specialist July 18, 2014 16:06

Cotton Bacterial Blight Update: July 18, 2014 (UPDATED 7/28/2014)

photoOver the past seven to 10 days numerous additional reports of bacterial blight have been made from throughout the state.  Several additional varieties, have been observed to contain bacterial blight infected leaves and in one situation, bolls.  Presently, seven cotton varieties representing four different seed companies have been reported.

 

Seed company Variety
Cropland 3787 B2RF
Deltapine 0912 B2RF
1028 B2RF
1034 B2RF
1321 B2RF
Phytogen 499 WRF
Stoneville 4946 GLB2

Additional bacterial blight has been observed this year in Louisiana for the first time in many years (see: http://louisianacrops.com/2014/07/18/bacterial-blight-angular-leaf-spot-observed-in-louisiana-cotton-fields/ ).  In MS, bacterial blight has been reported from 16 counties throughout the state.

2014 Bacterial blight distribution

Bacterial blight is predominantly a seedborne disease, except in rare situations where the organism overwinters on cotton residue remaining in the field.  Rain, overhead irrigation, wind, as well as equipment used in fields when dew is present can move the bacterium to fields of susceptible cotton.  Management practices should not be altered in situations where the disease is observed in susceptible cotton varieties.  Keep in mind, that the majority of the cotton varieties planted in MS are susceptible to the bacterium.

For more information regarding scouting practices, appearance of the disease, and the specific response of some cotton varieties please refer to:

http://www.mississippi-crops.com/2014/07/08/scouting-cotton-for-bacterial-blight-in-2014/

 

 

 

Print Friendly
Tom Allen, Extension Plant Pathologist
By Tom Allen, Extension Plant Pathologist and Darrin Dodds, Extension Cotton Specialist July 18, 2014 16:06
Write a comment

1 Comment

View comments

Write a comment

Your e-mail address will not be published.
Required fields are marked*

Subscribe to receive updates

  • Soybean Harvest Aids

    Several calls have come in over the last week regarding soybean harvest aid options for various scenarios. In some cases, fields have been observed with varying degrees of maturity. In ...
  • Sugarcane Aphid Control with Falling Temperatures

    In 2014 we saw two brief time periods of less than satisfactory control with Transform on sugarcane aphids in grain sorghum across a broad geography. At the time we were mixing a ...
  • Pheromone Trap Counts, August 28. 2015

    Bollworm trap catches remained similar to last week, which is somewhat lower than average for this time of year. Tobacco budworm trap catches were somewhat higher this week. As most ...
  • Pheromone Trap Counts, August 21, 2015

    Bollworm moth trap catches were slightly higher in most counties this week but are generally lower than average counts for this time of year. Tobacco budworm moths continued to be ...
  • Defoliating Caterpillars in Peanuts

    We have had numerous calls over the last 2 weeks about caterpillars in peanut from all around the state. In every case, the calls have involved a complex of multiple species including bollworm/tobacco budworm, cutworms, armyworms, saltmarsh caterpillar, loopers, and rednecked peanut worm. ...
  • 3rd Annual Mississippi Sweetpotato Field Day Program- August 27th

    Mississippi State University will host its 3rd Annual Sweetpotato Field Day Thursday August 27 at the Pontotoc Ridge-Flatwoods Branch Experiment Station (8320 Hwy 15 S., Pontotoc, MS 38863).  Registration is ...

More Info By