Cotton Defoliation Has Begun

A few early planted fields have been defoliated and more will follow soon.  At least one field in Florence County has already been harvested.

IMG_20150909_104403_360

There are two methods we use to determine when to defoliate cotton:  the percent of open bolls method and the nodes above cracked boll method.  Here is an excerpt from the Clemson Cotton Production Guide written by specialist Mike Jones on using these methods.

Defoliation

defoliation 2

For the best results, both methods should be used.  At times, as the diagram below shows, the percent of open bolls can be misleading.

defoliation 3

Here is a field in Dillon County that is just about ready to defoliate.

IMG_20150909_095521_702

Once ready to defoliate, there are dozens of combinations of products that can be used successfully.  Just make sure something is being included for defoliation, opening bolls, and suppressing regrowth.  Tribufos(defoliant), ethephon(boll opener), and thidiazuron( regrowth suppressant & defoliant) are usually a good combination, though there are plenty of others that will also work.  These chemicals can be found on pages 83-86 of the Cotton Production Guide.  A harvest aid like Aim or ET may be needed as well if there is a heavy population of morning glories present.  Check labels for tank mixing compatibility.

Advertisements
This entry was posted in Cotton and tagged , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s