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A Performance Summary of Finish™ Brand Harvest-aid on Stripper Cotton

M. Christian, A. Wiese, K. Holmes and G. Henniger


 
ABSTRACT

Finish® is a new cotton harvest-aid product being developed by Rhone-Poulenc Ag Company for boll opening, defoliation and regrowth control. Finish, has been extensively evaluated across the cotton belt in replicated small plot research trials since 1992 and in Experimental Use Permit (EUP) trials in 1995 and 1996. Defoliation and boll opening results are presented from harvest-aid trials conducted in OK and TX, with comparisons between the 2 trial designs being made when available. Finish performance was comparable to the standards in respect to defoliation. Boll opening was equivalent to or slightly better than the standards. Treatment performance comparisons, when available, between small plot and EUP trial data were usually similar. Finish enhanced defoliation over PREP™ in small plot trials with boll opening responses being equivalent between treatments in the TX trials and increased in the OK trials. Defoliation with Finish was slightly less than Prep + Folex®, with differences being minimized in EUP trials over small plot trials. Boll opening levels were similar between the 2 treatments in small plot trial data, with a consistent trend for enhanced boll opening for Finish being observed in the EUP trial data across evaluation intervals. Initially, Finish provided quicker defoliation at 4-7 DAT when compared to Ginstar. By 10-15 DAT, Ginstar had a higher defoliation mean than Finish with both treatments providing a high level of defoliation. Finish also, had consistently higher boll opening values (6-10%) than Ginstar across evaluation dates. Defoliation results were comparable between tankmixes of Finish + Folex vs. Prep + Folex, although there was a slight trend for reduced defoliation (2%) with Finish + Folex as compared to Prep + Folex in the EUP trial data. Comparing small plot trials with EUP trials, boll opening was initially lower (5%) in the small plot trials for the Finish + Folex treatment, however the difference was not observed at 10-15 DAT. Under commercial EUP conditions, boll opening responses were comparable between the 2 treatments, Finish + Folex vs. Prep + Folex. Significantly greater defoliation was observed in EUP trials with Finish + Ginstar as compared to the Prep + Ginstar combination. To a lesser degree, a similar trend in boll opening response between the 2 combinations was observed as well.



Reprinted from Proceedings of the 1997 Beltwide Cotton Conferences pp. 1365 - 1368
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998