Tolerance of Three Sweet Corn Hybrids to a Postemergence Tankmix of Nicosulfuron plus Bromoxynil

Abstract

<jats:p>Trials were conducted over 2 years at three locations in Ontario to determine the tolerance of three sweet corn hybrids to postemergence application of nicosulfuron (25 and 50 g·ha<jats:sup>–1</jats:sup>), bromoxynil (280 and 560 g·ha<jats:sup>–1</jats:sup>), and nicosulfuron plus bromoxynil (25 + 280 g·ha<jats:sup>–1</jats:sup> and 50 + 560 g·ha<jats:sup>–1</jats:sup>). All hybrids showed injury 7 days after treatment (DAT). The crop largely recovered from the injury in most treatments, as indicated by the ratings completed 14 and 28 DAT. However injury from the tankmix of nicosulfuron plus bromoxynil at both rates still appeared to be synergistic at 7, 14, and 28 DAT. Visual injury, height reductions and yield loss in the nicosulfuron plus bromoxynil (50 + 560 g·ha<jats:sup>–1</jats:sup>) treatment were more severe than in the other herbicide treatments. Yield of BSS5362 was significantly decreased in the nicosulfuron (50 g·ha<jats:sup>–1</jats:sup>) and nicosulfuron plus bromoxynil (50 + 560 g·ha<jats:sup>–1</jats:sup>) but was not affected by any other herbicide-hybrid combination. Caution must be exercised when using this tankmix combination, as there is potential to cause significant visual injury, height reductions and yield loss.</jats:p>

Exogenous melatonin alleviates nicosulfuron toxicity by regulating the growth, photosynthetic capacity, and antioxidative defense of sweet corn seedlings

“…Chemical weeding is currently the most effective and widely used method in crop cultivation. Nicosulfuron (NSF) is a sulfonylurea post-emergence herbicide commonly used in corn production owing to its high safety, efficiency in weed control, low residue, and low dosage (Corbett et al 2005, Chen et al 2023. However, compared to field maize, sweet corn is more susceptible to NSF (Robinson et al 1994, Greenland 2003).…”

Tolerance of Eight Sweet Corn (Zea mays L.) Hybrids to Pyroxasulfone

“…Sensitivity of sweet corn to herbicides is dependent on the application rate, hybrid, and environmental conditions. Sweet corn hybrid sensitivity has been documented for foramsulfuron (Diebold et al, 2003), bentazon (Diebold et al, 2004), prosulfuron , mesotrione , nicosulfuron (Corbett et al, 2005;O'Sullivan et al, 2000;Robinson et al, 1993;Stall and Bewick, 1992), primisulfuron , isoxaflutole , and thifensulfuron-methyl (Soltani et al, 2005b). Before pyroxasulfone can be registered for use in sweet corn, hybrid sensitivity must be determined.…”