THE USE OF PLANT MONITORING TECHNIQUES AS AN AID IN DETERMINING MEPIQUAT CHLORIDE RATES IN RAIN-FED COTTON
Mar 10, 2017

Agronomy & physiology WCRC Agro-physio-global WCRC1
Abstract                                                                         Back to Table of contents

Five Pix treatments were applied at seven locations across the Coastal Plain. The five treatments consisted of a check receiving no Pix, a low rate multiple approach receiving four applications of 292 ml ha-1 of Pix at 10-14 day intervals beginning at first square (LRM), a low rate multiple approach with Pix application based on a plant monitoring point system (LRM-PM), an early bloom approach receiving eight ounces at early bloom (EB) and a modified early bloom approach based on a plant monitoring point system (EB-PM). No yield responses were observed due to Pix at any locations due to the drought, the lack of value associated with earliness this year due to the drought and lack of excessive moisture at any location. All locations had good plant growth until about two weeks prior to early bloom. One location received almost no rainfall for the remainder of the season and the other six locations had limited rainfall capable of producing 800 to 1500 kg of lint ha-1. No location received what might be considered any where close to excessive rainfall. The LRM-PM system seemed to do a good job of recognizing the change in the crop prior to early bloom and called for lower Pix rates than the standard LRM. The EB-PM system appeared to be too aggressive and called for higher rates of Pix at than the standard EB approach at some locations. No significant yield reductions due to Pix treatments were observed.

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