Submitted to: International Weed Control Congress Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: June 27, 1996
Publication Date: N/A
Technical Abstract: Crop and soil management affect seedbank inputs and outputs of summer annual weeds. Inputs are governed primarily by in situ seed production, and seed germination is an important output. We studied a variety of management and weather variables on seed production and germination/emergence of several weed species for 5 years. Relative weed seed production per plant was less in tall vs. short crops, with intensive vs. reduced tillage, with soil-applied vs. postemergence herbicides, and in dry vs. wet years. Emergence from seedbanks was greater with intensive vs. reduced tillage, with postemergence vs. soil-applied herbicides, and in cool/wet vs. warm/dry years. Seedbank outputs now can be predicted in real time (daily basis) using recently developed simulation models. These models will be useful for efficiently managing weeds through the manipulation of crops and soils.