Selective Exposure of Yellow (Cyperus esculentus) and Purple Nutsedge (Cyperus rotundus) to Postemergence Treatments of CGA-362622, Imazaquin, and MSMA¹

Abstract

Greenhouse studies were conducted to evaluate shoot number, shoot weight, and root weight reduction of yellow and purple nutsedge to three placement levels (soil, foliar, and soil + foliar applied) and four herbicide treatments (CGA-362622, imazaquin, MSMA, and imazaquin + MSMA). Soil-applied CGA-362622 reduced shoot number, shoot weight, and root weight greater than foliar-applied CGA-362622. Foliar-applied imazaquin and soil-applied MSMA achieved little reduction in measured variables compared with the nontreated control. Foliar-applied imazaquin and soil-applied MSMA reduced shoot number, shoot weight, and root weight less than imazaquin + MSMA applied in a similar manner. Averaged over placement levels, imazaquin reduced shoot weight of yellow nutsedge greater than purple nutsedge. Averaged over herbicide treatments, soil-applied treatments were more effective in reducing purple nutsedge shoot number, whereas foliar-applied treatments were more effective in reducing yellow nutsedge shoot number.

Yellow Nutsedge (Cyperus esculentus) and Large Crabgrass (Digitaria sanguinalis) Response to Soil- and Foliar-Applied Mesotrione

“…Soil-plus-foliar treatments were not irrigated into the soil until 7 DAT because of the potential for herbicide leaching. Although we acknowledge these potential aberrations, we reference several publications on which we developed our methodology (McElroy et al 2003(McElroy et al , 2004Wilcut 1998;Williams et al 2003).…”

Potential effects of diurnally alternating temperatures and solarization on purple nutsedge (Cyperus rotundus) tuber sprouting

“…Table 4 Mean (MEDT), maximum (MADT) and minimum (MIDT) daily temperature, daily temperature fluctuation (DTF) and standard deviations in two soil depths for the control and solarized plots. ( McElroy et al, 2003). Consequently, stimulation of sprouting by means of solarization could greatly reduce persistence of dormant tubers and may allow a more effective control by tillage, herbicides (e.g.…”

Sequential Postemergence Applications for the Control of Yellow Nutsedge in Bermudagrass Turf

“…Effects of selective herbicide placement on sedge control have been previously reported for certain herbicides (McElroy et al, 2003;Nandihalli and Bendixen, 1988;Reddy and Bendixen, 1988). However, information regarding the response of sedge species to currently available herbicides is limited.…”