{"id":1461,"date":"2016-09-05T21:05:49","date_gmt":"2016-09-06T01:05:49","guid":{"rendered":"http:\/\/site.extension.uga.edu\/colquittag\/?p=1461"},"modified":"2016-09-05T21:12:27","modified_gmt":"2016-09-06T01:12:27","slug":"tips-on-cotton-defoliation","status":"publish","type":"post","link":"https:\/\/site.extension.uga.edu\/colquittag\/2016\/09\/tips-on-cotton-defoliation\/","title":{"rendered":"Tips on Cotton Defoliation"},"content":{"rendered":"

At the cotton defoliation meeting that was held last week at the Colquitt County Extension office, Jared Whitaker brought up some good points to consider for this upcoming cotton harvest season.<\/p>\n

Defoliation Timing:<\/strong>
\nCotton defoliation is a sensitive process. For a successful harvest, defoliation must be carefully timed and carried out. Poor defoliation can lower fiber quality, while defoliating too early lowers yield and micronaire. Late defoliation increases the likelihood of boll rot and lint damage or loss due to weathering. Late defoliating also increases the possibility that defoliant activity will be inhibited by lower temperatures<\/p>\n

Three ways to determine crop maturity and defoliation timing:
\n\u2022 60 to 75% open bolls (only 60 for uniform crop)<\/p>\n

\u2022Sharp Knife \u2013 cotton strings when boll is cut
\n\u2013 Seed are fully developed (brown coat & cotyledons)
\n\u2022 NACB \u2013 4 or less (around 3 days per node)
\nThere is often a relationship between percent open bolls in the canopy and the number of nodes between the uppermost first position cracked boll and uppermost first position harvestable boll (NACB).<\/p>\n

Water Volume:<\/strong><\/p>\n

Most harvest aid materials do not translocate or move very far within the plant. Therefore, application coverage is important. To ensure adequate foliar coverage use the proper spray pressure, ground speed and nozzle size in order to apply the desired spray volume in accordance of label instructions.
\nWATER VOLUME CAN SIGNIFICANTLY IMPACT OVERALL PERFORMANCE, THE MORE WATER THE BETTER (SHOOT FOR 15 GPA).\u00a0 The wind damage from tropical system last week may make defoliation with ground sprayers a challenge for area cotton growers.<\/p>\n

Rainfall occurring after applications can affect defoliant activity. Be sure to consider weather forecasts when making applications and pay attention to rain-free periods of particular products. Thidiazuron is of particular concern, since it requires a 24 hour rain-free period.\u00a0 Below is a chart of rainfast periods of cotton defoliants.<\/p>\n

\"rainfast<\/a><\/p>\n

Three Way Defoliation Mixtures:<\/strong><\/p>\n

I have been getting numerous questions about defoliation rates especially for the “Three Way.”\u00a0 Below is a chart that will answer some of these questions..<\/p>\n

\"three<\/a><\/p>\n

Weeds:<\/strong><\/p>\n

In cases where weeds are present at harvest, some cotton defoliants are products that have herbicidal activity on particular pests. See the table below from the UGA Pest Management Handbook for specific recommendations.<\/p>\n

\"cotton<\/a><\/p>\n

If you have any questions please feel free to contact the Colquitt County Extension Office.<\/p>\n

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 <\/p>\n","protected":false},"excerpt":{"rendered":"

At the cotton defoliation meeting that was held last week at the Colquitt County Extension office, Jared Whitaker brought up some good points to consider for this upcoming cotton harvest season. Defoliation Timing: Cotton defoliation is a sensitive process. For a successful harvest, defoliation must be carefully timed and carried out. Poor defoliation can lower […]<\/p>\n","protected":false},"author":67,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-1461","post","type-post","status-publish","format-standard","hentry","category-cotton"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/posts\/1461","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/users\/67"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/comments?post=1461"}],"version-history":[{"count":2,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/posts\/1461\/revisions"}],"predecessor-version":[{"id":1466,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/posts\/1461\/revisions\/1466"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/media?parent=1461"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/categories?post=1461"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/tags?post=1461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}