|Hartzler, Robert - IOWA STATE UNIVERSITY|
|Sandell, Lowell - IOWA STATE UNIVERSITY|
Submitted to: Integrated Crop Management Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: December 3, 1999
Publication Date: N/A
Technical Abstract: A better understanding of weed biology is critical for the development of more efficient weed management systems. Improved information on weed biology provides the foundation for the development of new strategies and more efficient techniques to use these tools, resulting in more reliable weed management systems that are cost-effective and pose less threat to the eenvironment. Weed control recommendations typically provide information o appropriate tillage methods and herbicide selection. The information concerning weed infestations used to base these recommendations typically is not of sufficient detail to optimize the efficiency of these strategies. Information on weed populations can be improved by increasing the time spent scouting fields. However, time restraints during the busy spring season restrict this opportunity. This problem could be alleviated with an improved understanding of the environmental influences on emergence and growth of different weed species, therefore allowing us to predict when best to invest time in scouting. Armed with greater knowledge of weed populations and their development, a person could determine the optimum time for tillage and crop planting to reduce weed populations, maximize the effectiveness of mechanical weed control operations, and optimize the timing of burndown and postemergence herbicide applications. Understanding emergence patterns may also help in anticipating the response of weed populations to changing control and other management practices. Although there has been considerable research and modeling of weed emergence years, little effort has been directed toward development of multi-species emergence information for persons involved in weed management.