Abstract
At a northern Iowa location, populations of 145, 203, 62, and 37 velvetleaf plants/m2emerged in the four years following seed production by 0.4 velvetleaf plants/m2growing in soybean. Annual velvetleaf densities in areas with no seed input averaged less than 6 plants/m2. At a central Iowa location, verticillium wilt reduced velvetleaf seed production, resulting in an average increase of 9 plants/m2in the two years following seed production compared to the control treatment. This type of information is necessary to develop economic optimum thresholds, but the variability between locations demonstrates the difficulty in predicting crop and weed responses to management strategies implemented early in the growing season.
Publisher
Cambridge University Press (CUP)
Subject
Plant Science,Agronomy and Crop Science
Reference24 articles.
1. Ruber, Dave. 1990. Personal communication. Northern Iowa Outlying Research Farm manager.
2. Suppression of red rice (Oryza sativa) seed production with fluazifop and quizalofop;Salzman;Weed Sci.,1988
3. The Influence of Weed Seed Dispersion Versus the Effect of Competition on Crop Yield
4. Lindquist J. L. 1994. Population dynamics and economics of velvetleaf in a corn-soybean rotation. M.S. Thesis, Univ. of Minnesota, St. Paul. 73 p.
5. A Comparison of Economic and Economic Optimum Thresholds for Two Annual Weeds in Soybeans
Cited by
33 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献