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Herbicide Injury: ACCase Inhibitors - Group 1 Graminicides (sethoxydim, fluazifop-p-butyl, quizalofop-p-ethyl) injury to Corn

Author:

Greg Stewart - Corn Industry Program Lead/OMAF; Mike Cowbrough - Weed Management Field Crops Program Lead/OMAF
Creation Date: Not Available
Last Reviewed: 25 August 2003
Group 1 graminicide (ACCase) injury on corn appears as intervenal chlorosis on newer leaves. Older leaves may show red or purple. The growing point turns brown and dies. The top of the plant can be easily pulled out of the whorl. New growth dies first, such that the plant appears to take considerable time to die after application. Group 1 graminicide (ACCase) injury on corn appears as intervenal chlorosis on newer leaves. Older leaves may show red or purple. The growing point turns brown and dies. The top of the plant can be easily pulled out of the whorl. New growth dies first, such that the plant appears to take considerable time to die after application.

From OMAF Publication 811: Agronomy Guide for Field Crops, click here (http://www.omafra.gov.on.ca/english/products/field.html) to order.

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