Start Date

18-11-1997 12:00 AM

Description

The primary purpose for controlling weeds in field crops is to prevent or reduce yield losses associated with competition between weeds and the crop. Competition occurs when plants seek the same resource (light, water, etc.) that is available in limited supplies. The interaction between crops and weeds is complicated and impacted by many factors, including characteristics of the weed species, weed populations, timing of weed emergence, characteristics of the crop variety/hybrid, crop population and row spacing, and the environment. This complexity limits our ability to predict yield losses early in the growing season, therefore hindering the development of economic thresholds for weed. This paper will discuss two important factors influencing competition: 1) relative competitiveness of different weeds, and 2) the critical periods of competition. More information on this topic is available in ISU Extension bulletin IPM-35, CropWeed Interactions.

DOI

https://doi.org/10.31274/icm-180809-557

Share

COinS
 
Nov 18th, 12:00 AM

How Much Do Weeds Impact Crop Yields?

The primary purpose for controlling weeds in field crops is to prevent or reduce yield losses associated with competition between weeds and the crop. Competition occurs when plants seek the same resource (light, water, etc.) that is available in limited supplies. The interaction between crops and weeds is complicated and impacted by many factors, including characteristics of the weed species, weed populations, timing of weed emergence, characteristics of the crop variety/hybrid, crop population and row spacing, and the environment. This complexity limits our ability to predict yield losses early in the growing season, therefore hindering the development of economic thresholds for weed. This paper will discuss two important factors influencing competition: 1) relative competitiveness of different weeds, and 2) the critical periods of competition. More information on this topic is available in ISU Extension bulletin IPM-35, CropWeed Interactions.

 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.