FINISH®, a Physiological Approach to Cotton Boll Opening and Defoliation
Apr 18, 2019
Dehiscence processes (boll opening, leaf shedding) in the cotton plant is mediated through a delicate balance of plant hormones. Ethylene promotes dehiscence primarily by stimulating the enzymes involved in the hydrolysis of insoluble pectates and cellulose that ensure the adherence of cells in the abscission zones. The growth promoting plant hormones auxin (IAA) and gibberelins antagonize this process. By associating ethephon (2-chloroethyl phosphonic acid) that releases ethylene directly into the plant tissues with cyclanilid, (1-[2,4-dichloro phenilaminocarbonyl] cyclopropane carboxylic acid) an auxin polar transport and gibberelic acid synthesis inhibitor in the Finish® product, superior boll opening and defoliation could be achieved. Finish® has been tested in numerous critical replicated trials and commercial applications during the past several years in most cotton growing countries worldwide. Mode of action is discussed and typical results presented.