False-green kyllinga (Kyllinga gracillima) control in cool-season turfgrass. (23rd April 2019)

• Record Type: Journal Article
• Authors: Elmore, Matthew T.; Patton, Aaron J.; Tuck, Daniel P.; Murphy, James A.; Carleo, Jenny
• Is Part Of: Weed technology. Volume 33:Number 2(2019)
• Page Start: 329
• Page End: 334
• Publication Date: 2019-04-23
• Subjects: Scott McElroy, Auburn University; Halosulfuron-methyl, -- imazosulfuron, -- mesotrione, -- sulfentrazone, -- false-green kyllinga, Kyllinga gracillima Miq., -- creeping bentgrass, Agrostis stolonifera L.; Acetolactate synthase, -- ALS inhibitor, -- PPO inhibitor, -- protoporphyrinogen oxidase, -- sulfonylurea, -- turfgrass; Weeds -- Periodicals; Weeds -- Control -- Periodicals; 632.5
• DOI: 10.1017/wet.2019.16
• Languages: English
• ISSNs: 0890-037X

Abstract

Abstract: We conducted research to evaluate various herbicides for POST false-green kyllinga control in cool-season turfgrass (primarily creeping bentgrass). In a preliminary evaluation, single and sequential applications of halosulfuron-methyl (70 g ai ha −1 ), mesotrione (175 g ai ha −1 ), and sulfentrazone (140 g ai ha −1 ), as well as a single application of imazosulfuron (740 g ai ha −1 ), were evaluated in New Jersey. Imazosulfuron and sequential applications of halosulfuron-methyl controlled false-green kyllinga >93% at 9 and 18 wk after initial treatment (WAIT). Sulfentrazone and mesotrione controlled false-green kyllinga <50%. Additional experiments were conducted to evaluate single and sequential applications of halosulfuron-methyl (70 g ha −1 ), imazosulfuron (420 and 740 g ha −1 ), and sulfentrazone (140 g ha −1 ) in New Jersey and Indiana at two locations in each state. At 12 WAIT, imazosulfuron generally controlled false-green kyllinga more effectively than other treatments at all locations. Sequential applications of imazosulfuron controlled false-green kyllinga 100% at 12 WAIT. Halosulfuron-methyl was less effective in Indiana than in New Jersey. Sulfentrazone controlled false-green kyllinga <40% at 12 WAIT. This research demonstrates that imazosulfuron is more effective than halosulfuron-methyl and sulfentrazone for POST false-green kyllinga control in cool-season turf.