Evaluating Postemergence Herbicides, Safener, and Tolerant Hybrids for Corn Response

Crop safety is one of the many considerations when deciding which POST herbicide to use. This research examined relative corn injury as a result of POST herbicides and the effect of including the safener isoxadifen, the choice of a sensitive or tolerant hybrid, or both. The herbicides included comme...

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Bibliographic Details
Published inWeed technology Vol. 30; no. 4; pp. 869 - 877
Main Authors VanGessel, Mark J, Johnson, Quintin R, Scott, Barbara A
Format Journal Article
LanguageEnglish
Published Lawrence The Weed Science Society of America 01.10.2016
Weed Science Society of America
Cambridge University Press
Subjects
Agricultural production
Area under the curve
Cereal crops
Competition
Corn
Crops
cumulative stunting
Grains
Growth retardation
Herbicide resistance
Herbicides
Hybrids
Hypochromic anemia
Impact tolerances
Methods
Plant growth
Vegetables
Weed competition
Weed control
WEED MANAGEMENT—MAJOR CROPS
Weeds
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Summary:Crop safety is one of the many considerations when deciding which POST herbicide to use. This research examined relative corn injury as a result of POST herbicides and the effect of including the safener isoxadifen, the choice of a sensitive or tolerant hybrid, or both. The herbicides included commercial combinations of dicamba, diflufenzopyr, nicosulfuron, rimsulfuron, and thifensulfuron, all at twice the labeled rate. Isoxadifen reduced twisting from dicamba plus diflufenzopyr but not with dicamba plus rimsulfuron. Isoxadifen had negligible effect on chlorosis. In general, rimsulfuron plus thifensulfuron caused the most corn stunting, whereas including isoxadifen or using a tolerant hybrid often reduced corn injury. In two of the four years, treatments with rimsulfuron plus thifensulfuron resulted in yield reductions. Although using products with isoxadifen or selecting tolerant hybrids may influence injury, herbicide selection will have the greatest effect on corn injury. Nomenclature: Dicamba; diflufenzopyr; nicosulfuron; rimsulfuron; thifensulfuron; isoxadifen; corn, Zea mays L.
ISSN:0890-037X
1550-2740
DOI:10.1614/WT-D-16-00011.1