Other Field Crops: Introduction


Pub 75: Guide to Weed Control > Other Field Crops > Introduction


Excerpt from 2010/2011 Publication 75, Guide to Weed Control, Order this publication

Cover of Publication 75, Guide to Weed ControlIntroduction

Herbicide Treatments include:

  • Preplant (PP) - Also see Preplant Weed Control, Preplant-Site Preparation Prior To Any Crop, page 81, for details of products, rates and remarks.

  • Preplant Incorporated (PPI) - Two incorporations at right angles operating at a depth of 10 cm using a double disk (7–10 km/hr) or vibrating shank S-tine cultivator (10–13 km/hr) are required unless otherwise stated. Cultivation-type equipment used for herbicide incorporation is known to spread perennial weeds to previously uninfested areas. Ensure machines are clean and/or treat fields with perennial weeds last.

  • Preemergence (PRE) - Rainfall of 15–20 mm within 10 days after application is necessary to activate preemergence treatments. Shallow cultivation, rotary hoeing or harrowing will control weed escapes and improves herbicide activity in the
    absence of rainfall.

  • Postemergence (POST) - Leaf stage of the weeds is critical for good weed control. Smaller weeds are usually more sensitive to herbicide injury. Apply according to recommended leaf stages. Crop stage is important to optimize crop safety. Adjuvants will frequently improve the weed control when used as directed. Weather or other conditions may influence the optimum rate of adjuvant, see the product label for more details. Always use appropriate drift management technology.

Related Links


For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca
Author: OMAFRA Staff
Creation Date: 25 November 2002
Last Reviewed: 10 June 2011