Post application Environment Controls Growth Responses in Cotton
Apr 26, 2019
RyzUp is a gibberellic acid-based plant growth promoter for cotton. The objective of this study was to determine whether growth responses of cotton to RyzUp application depend on post-treatment environmental conditions defined by temperature and potential evapotranspiration. The experiments were conducted at the Texas A&M University Agricultural Research and Extension Centres in Corpus Christi and Uvalde, TX, during the 1996 and 1997 seasons. Results showed that the cotton’s growth responses to RyzUp depended strongly on year, location and timing of application within year. Responses of both plant height and number of fruiting positions to RyzUp appeared to be inversely related to cumulative atmospheric water demand during the 15 days following treatment. Practical implications of this finding point towards possible fine-tuning the management of RyzUp application, depending on prevailing or near-future weather conditions.