University of Missouri Extension

IPM1007, Revised November 2009

Practical Weed Science for the Field Scout: Corn and Soybean

Lipid synthesis inhibitors

Low doses of ACCase inhibitors such as sethoxydim and clethodim as drift or tank contamination can cause corn to whiten leaves in the whorl.
Low doses of ACCase inhibitors such as sethoxydim and clethodim as drift or tank contamination can cause corn to whiten leaves in the whorl. Low doses of ACCase inhibitors such as sethoxydim and clethodim as drift or tank contamination can cause corn to whiten leaves in the whorl.
 

Postemergence lipid synthesis-inhibiting herbicide like sethoxydim, clethodim and quizalofop causes chlorosis and purpling of corn leaves and will cause the meristem of the newest leaf to rot. Postemergence lipid synthesis-inhibiting herbicide like sethoxydim, clethodim and quizalofop causes chlorosis and purpling of corn leaves and will cause the meristem of the newest leaf to rot.
Postemergence lipid synthesis-inhibiting herbicide like sethoxydim, clethodim and quizalofop causes chlorosis and purpling of corn leaves and will cause the meristem of the newest leaf to rot.Postemergence lipid synthesis-inhibiting herbicide like sethoxydim, clethodim and quizalofop causes chlorosis and purpling of corn leaves and will cause the meristem of the newest leaf to rot.
 

Injury from post-selective grass herbicide. Notice the dead, necrotic meristem of the plant when the whorl is removed.
Injury from post-selective grass herbicide. Notice the dead, necrotic meristem of the plant when the whorl is removed.Injury from post-selective grass herbicide. Notice the dead, necrotic meristem of the plant when the whorl is removed.
 

Quizalofop can cause chlorosis near leaf veins of soybeans. This injury will eventually progress into necrosis.
Quizalofop can cause chlorosis near leaf veins of soybeans. This injury will eventually progress into necrosis.Quizalofop can cause chlorosis near leaf veins of soybeans. This injury will eventually progress into necrosis.
 

Aryloxyphenoxypropionates and cyclohexanediones chemical group

Herbicides

Mode of action and characteristics of activity

General symptoms

 

IPM1007 Practical Weed Science for the Field Scout: Corn and Soybean | University of Missouri Extension

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