About
  PDF
Full Text
(44 K)

Evaluation of Cotton Harvest Aids in the Brazos Bottoms

T.K Witten, P.H. Jost and J.T. Cothren


 
ABSTRACT

Cotton defoliation is a continuing challenge for growers in the Brazos Bottoms. A two-year study was designed to evaluate several "standard" defoliation treatments on cotton variety DP&L 50 at the Texas Agricultural Experiment Station near College Station, Texas. Harvest-aid treatments included were: an untreated check; Folex (0.75 pt/A) + Prep (1.33 pt/A); Ginstar (8 oz/A); Dropp 50WP (0.1 lb/A) + Prep (1.33 pt/A); Folex (0.75 pt/A) + Prep (1.33 pt/A) + Dropp 50WP (0.1 lb/A); Harvade (0.5 pt/A) + Folex (0.75 pt/A) + Prep (1.33 pt/A) + Agridex (1 pt/A); Finish (2 qt/A); and Dropp 50WP (0.25 lb/A) followed by Starfire (6 oz/A) + Sodium Chlorate (4.5 lb ai/A) + AG-98 (0.25 % v/v) 5 days after initial treatment (DAIT). All treatments were applied when the cotton was at 60% open boll. Plots were evaluated for percent defoliation and desiccation at 7 and 14 DAIT. Percent open bolls was evaluated at 7 DAIT and basal and terminal regrowth was evaluated at 21 DAIT. In 1997 and 1998, performance of Ginstar 7 DAIT was superior to other treatments and provided a total performance rating of 87%. By 14 DAIT, Ginstar and Dropp followed by Starfire + Sodium Chlorate + AG-98 provided the best defoliation, with performance ratings providing greater than 86% in both years. None of the harvest aid treatments gave acceptable regrowth control 21 DAIT. Boll opening was not enhanced with any harvest aid treatment. Other treatments in the study provided a total performance rating of less than 87% and were not acceptable for harvest-aid treatments.



Reprinted from Proceedings of the 1999 Beltwide Cotton Conferences pp. 617 - 620
©National Cotton Council, Memphis TN

[Main TOC] | [TOC] | [TOC by Section] | [Search] | [Help]
Previous Page [Previous] [Next] Next Page
 
Document last modified Monday, Jun 21 1999