Location: Integrated Cropping Systems ResearchTitle: Landscape positions with more favorable growing conditions produce weed seeds with greater emergence rates in subsequent years
|FORCELLA, FRANK - Retired ARS Employee|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 6/9/2020
Publication Date: N/A
Technical Abstract: In a two-year field study, we evaluated the emergence and early growth of common lambsquarters seedlings as affected by the landscape position in which the seeds (a) developed, (b) overwintered, and (c) were planted. Results indicated that a higher proportion of seeds originating from lower slope positions emerged compared with seeds originating from the backslope or upper slope. The timing of emergence was the same for all seed source locations. There was no influence of overwintering location on weed emergence. Regardless of the seed source, we observed faster emergence and growth of lambsquarters planted in the lower slope, where soil conditions were more conducive to growth. These experiments will support the development of new strategies and decision aids to improve weed management.