Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: 1/5/1997
Publication Date: N/A
Technical Abstract: In 1994, cotton (Gossypium hirsutum L.) bolls of DES 119 and Deltapine 90, were harvested by fruiting sites. Cultivars were grown under normal growing conditions with good insect control. Deltapine 90 fibers were stronger, shorter, more mature, flatter, and had a smaller perimeter than DES 119. Fibers developed in early season were more mature with higher micronaire. Fiber from all positions at the upper nodes was stronger than from middle and lower fruiting sites. First position fibers were significantly longer than third. Mature fibers had greater wall thickness when compared to immature fibers. DES 119 and DP 90 produced yields of 1390 and 1441 pounds of lint per acre, respectively. In 1995 this experiment was repeated with the same cultivars. Fiber measurements were made only from mainstem nodes five to twelve. Bolls above node twelve aborted due to heavy late season insect populations. Yields were only 498 and 466 pounds of lint per acre for DES 119 and DP 90, respectively. These abnormally low yields due to late season insect damage produced unusual fiber properties. Bolls that were retained had above normal fiber properties for all positions.