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ARS Home » Pacific West Area » Logan, Utah » Forage and Range Research » Research » Publications at this Location » Publication #296511

Research Project: Develop Improved Plant Genetic Resources to Enhance Pasture and Rangeland Productivity in the Semiarid Regions of the Western U.S.

Location: Forage and Range Research

Title: Small burned response to spring and fall postemergence herbicide applications

Author
item Nelson, Ryan
item Peel, Michael
item RANSOM, COREY - Utah State University

Submitted to: Weed Technology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/18/2013
Publication Date: 1/1/2014
Citation: Nelson, R.L., Peel, M., Ransom, C.V. 2014. Small burned response to spring and fall postemergence herbicide applications. Weed Technology. 28:168-175.

Interpretive Summary: Small burnet is a hardy, relatively long-lived evergreen forb. Since it stays green during the winter, it has potential to improve grazinglands, particularly to extend grazing into late fall and winter. Small burnet was evaluated for tolerance to herbicides applied in the spring and fall. The herbicides included aminopyralid, bromoxynil, clethodim, clopyralid, dicamba, dimethenamid-P, imazamox, metribuzin, pendimethalin, quinclorac, and 2, 4-DB. Visible injury, seed yield, seed viability, and forage yield were measured in the sping following application. Visible injury was observed for all spring and fall herbicide applications. Injury from aminopyralid applications was the highest for both spring (24%) and fall applications (79%). Fall applications of imazamox and dicamba resulted in 57% and 31% visible injury, respectively. Spring applied aminopyralid and 2, 4-DB both reduced forage yield by 16% while fall applications of imazamox, dicamba, and aminopyralid reduced DMY by 36, 12, and 67%, respectively. Fall applications of imazamox and aminopyralid reduced seed yield 33 and 65%, respectively. Fall applied aminopyralid reduced seed germination by 43%. None of the spring applied herbicides impacted seed yield or seed germination. Small burnet is severely injured by Aminopyralid and to a lesser degree by imazamox and dicamba. Bromoxynil, clethodim, clopyralid, dimethenamid-P, metribuzin, pendimethalin, and quinclorac, did not affect small burnet DMY, seed yield, or germination the year following application.

Technical Abstract: Small burnet (Sanguisorba minor scop.) is a hardy, relatively long-lived evergreen forb with the potential to improve grazinglands, particularly to extend grazing into late fall and winter. Small burnet was evaluated for tolerance to spring and fall postemergence applications of aminopyralid, bromoxynil, clethodim, clopyralic, dicamba, dimethenamid-P, imazamox, metribuzin, pendimethalin, quinclorac, and 2, 4-DB. Visible injury, seed yield, seed viability, and dry matter yield (DMY) were measured in the spring following application. Visible injury was observed for all spring and fall herbicide applications. Injury from aminopyralid applications was the highest for both spring and fall applications at 24 and 79%, respectively. Fall applications of imazamox and dicamba resulted in 57% and 31% visible injury, respectively. Spring applied aminopyralid and 2, 4-DB both reduced DMY by 16% while fall applications of imazamox, dicamba, and aminopyralid reduced DMY by 36, 12, and 67%, respectively. Fall applications of imazamox and aminopyralid reduced seed yield 33 and 65%, respectively. Fall applied aminopyralid reduced seed germination by 43%. None of the spring applied herbicides impacted seed yield or seed germination. Small burnet is severely injured by Aminopyralid and to a lesser degree by imazamox and dicamba. Bromoxynil, clethodim, clopyralid, dimethenamid-P, metribuzin, pendimethalin, and quinclorac, did not affect small burnet DMY, seed yield, or germination the year following application.