Insecticide and irrigation termination may be timed as early as possible without sacrificing yield and quality potential based on heat unit accumulation beyond cutout or the last effective boll population. Collecting nodes above the first position white flower during the entire flower period is critical in correctly establishing the date of cutout. Many describe cutout as the date that five nodes are located above the first position white flower or NAWF=5.
Producers can access these and other crop termination tips under the National Cotton Council's Advancing Cotton Education (ACE) program. The ACE site at http://www.cotton.org/tech/ace/index.cfm includes such resources as the Cotton Physiology Today newsletters, Integrated Crop Management, "First Forty Days and Fruiting to Finish," Cotton Incorporated's Focus on Cotton and Cotton eXtension.