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Weed Management in Peanut with Herbicide Combinations Containing Imazapic and Other Pesticides

Published online by Cambridge University Press:  20 January 2017

David L. Jordan*
Affiliation:
Department of Crop Science, Box 7620, North Carolina State University, Raleigh, NC 27695
Sarah H. Lancaster
Affiliation:
Department of Crop Science, Box 7620, North Carolina State University, Raleigh, NC 27695
James E. Lanier
Affiliation:
Department of Crop Science, Box 7620, North Carolina State University, Raleigh, NC 27695
Bridget R. Lassiter
Affiliation:
Department of Crop Science, Box 7620, North Carolina State University, Raleigh, NC 27695
P. Dewayne Johnson
Affiliation:
Department of Crop Science, Box 7620, North Carolina State University, Raleigh, NC 27695
*
Corresponding author's E-mail: [email protected].

Abstract

Research was conducted in North Carolina to compare weed control by various rates of imazapic POST alone or following diclosulam PRE. In a second experiment, weed control by imazapic applied POST alone or with acifluoren, diclosulam, or 2,4-DB was compared. In a final experiment, yellow nutsedge control by imazapic alone and with the fungicides azoxystrobin, chlorothalonil, pyraclostrobin, and tebuconazole was compared. Large crabgrass was controlled more effectively by imazapic POST than diclosulam PRE. Common lambsquarters, common ragweed, and eclipta were controlled more effectively by diclosulam PRE than imazapic POST. Nodding spurge was controlled similarly by both herbicides. Few differences in control were noted when comparing imazapic rates after diclosulam PRE. Applying either diclosulam PRE or imazapic POST alone or in combination increased peanut yield over nontreated peanut in five of six experiments. Few differences in pod yield were noted when comparing imazapic rates. Acifluorfen, diclosulam, and 2,4-DB did not affect entireleaf morningglory, large crabgrass, nodding spurge, pitted morningglory, and yellow nutsedge control by imazapic. Eclipta control by coapplication of imazapic and diclosulam exceeded control by imazapic alone. The fungicides azoxystrobin, chlorothalonil, pyraclostrobin, and tebuconazole did not affect yellow nutsedge control by imazapic.

Type
Weed Management—Major Crops
Copyright
Copyright © Weed Science Society of America 

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