Sweet Corn (Zea mays) Cultivar Sensitivity to AE F130360¹

Abstract

Eight sweet corn cultivars were evaluated for tolerance to AE F130360 in five field experiments conducted over 2 yr in Ontario. AE F130360 was applied postemergence at 70 and 140 g ai/ha, the latter rate representing a spray overlap in the field. Response to AE F130360 varied with respect to sweet corn cultivar and herbicide rate. Minimal crop injury was observed in seven of the eight cultivars. One cultivar, ‘DelMonte 2038’, was extremely sensitive, showing 94% or more injury for all site-years. Plant height of most cultivars was not negatively affected by AE F130360 treatments, with the exception of DelMonte 2038, which sustained height reductions of 78% or greater compared with the untreated control. The crop injury and height reductions that were observed in DelMonte 2038 were reflected in the marketable yields, which were reduced by 92% or more as a result of the AE F130360 treatments. Marketable yields also tended to be reduced in ‘Calico Belle’ and ‘Rival’. On the basis of marketable yields, it was concluded that ‘CNS 710’, ‘GG 222’, ‘GG 246’, ‘GH 2684’, and ‘Reveille’ have full tolerance to AE F130360, Calico Belle and Rival tend to have moderate tolerance, and DelMonte 2038 has zero tolerance to AE F130360.

Response of Eight Sweet Corn (Zea mays L.) Hybrids to Topramezone

“…Stall and Bewick (1992) determined that four of 12 hybrids demonstrated a response to nicosulfuron rate and marketable yield was significantly lower at higher rates. Similar sweet corn yield responses were also reported with other herbicides such as AE F130360 (foramsulfuron), CGA 152,005 (prosulfuron), primisulfuron, and rimsulfuron (Diebold et al, 2003;O'Sullivan et al, 1998;Sikkema 2001, 2002;Van Wychen et al, 1997).…”

“…Sensitivity of sweet corn to herbicides is dependent on the application rate, hybrid, and environmental conditions. Some of the commonly grown sweet corn hybrids in Ontario such as Calico Belle, Delmonte 2038, and GH2684 have shown sensitivity to other herbicides such as AE F130360 (foramsulfuron), bentazon, CGA152005 (prosulfuron), mesotrione, nicosulfuron, primisulfuron, and RPA201772 (isoxaflutole) (Diebold et al, 2003(Diebold et al, , 2004Sikkema 2001, 2002;O'Sullivan et al, 1999O'Sullivan et al, , 2000Robinson et al, 1993). Hybrid sensitivity is an important factor for registration of herbicides in sweet corn.…”

Herbicide Safeners Increase Waxy Maize Tolerance to Nicosulfuron and Affect Weed Control

“…At 3 WAT, all treatments were not statistically different (Table 4). These findings are similar to those records after treatment with nicosulfuron [2], nicosulfuron plus rimsulfuron [5], foramsulfuron [25] and thifensulfuron-methyl [26]. Both plant height and maize injury showed similar trends.…”

Response of Eight Sweet Maize (<i>Zea mays</i> L.) Hybrids to Saflufenacil Alone or Pre-Mixed with Dimethenamid-P

“…Diebold et al (2003Diebold et al ( , 2004 [10] reported up to 94% reduction in yield with formsulfuron in sweet maize. Similar yield reduction were reported with mesotrione [13], nicosulfuron [14], foramsulfuron [10] and nicosulfuron plus rimsulfuron [24,25] in some sensitive sweet maize hybrids. The potential for and level of crop injury from use of nicosulfuron, mesotrione, and foramsulfuron on any specific sweet maize hybrid is conditioned largely by CYP alleles at the nsf1/ben1 locus on the short arm of chromosome 5 [27].…”

“…Sensitivity of sweet maize to herbicides is dependent on the application dose, hybrid, and environmental conditions. Sweet maize hybrid sensitivity has been documented for foramsulfuron [10], bentazon [11], prosulfuron [12], mesotrione [13], nicosulfuron [14,15], primisulfuron [16], isoxaflutole [17], and thifensulfuron-methyl [18].…”