The rich biodiversity of agricultural fields and their surroundings enhances natural ecosystems has a positive impact on productivity resistance, e [...]

M R RYAN*, D A MORTENSEN*, L BASTIAANS , J R TEASDALE , S B MIRSKY , W S CURRAN*, R SEIDEL§, D O WILSON§ & P R HEPPERLY§ *Department of Crop and Soil Science, The Pennsylvania State University, University Park, PA, USA, Crop and Weed Ecology, Wageningen University, Wageningen, the Netherlands, Sustainable Agricultural Systems Laboratory, USDA-ARS, Beltsville, MD, USA, and §King’s Agriseeds Inc....

4th International Workshop on Functional-Structural Plant Models, 7-11 june 2004 –Montpellier, France Edited by C. Godin et al., pp. 210-215 A 3D approach for modelling tillering in wheat (Triticum aestivum L.) J.B. Evers, J. Vos, C. Fournier, B. Andrieu, M. Chelle, P.C. Struik 1 Group Crop and Weed Ecology, Department of Plant Sciences, Wageningen University, Haarweg 333, 6709 RZ Wageningen, t...

Dormancy is a form of developmental arrest and is an adaptive trait that promotes the survival of many organisms. In flowering plants, dormancy occurs in seeds and vegetative propagules (Lang 1996). Seed dormancy increases the distribution of germination over time, thus enhancing the survival of plants in an ever-changing environment. Seed dormancy is of intrinsic interest to weed scientists be...

Ever-increasing demand for water to irrigate crops, support aquaculture, provide domestic water needs and to protect natural aquatic and riparian habitats has necessitated research to reduce impacts from a parallel increase in invasive aquatic weeds. This paper reviews the past 4-5 years of research by USDA-ARS covering such areas as weed biology, ecology, physiology and management strategies, ...

India has a wide range of agroclimates and soil types. The highly diverse agriculture and fanning systems are beset with different types of weed problems. Weeds cause 10-80% crop yield losses besides impairing product quality and causing health and environmental hazards. Invasive alien weeds are a major constraint to agriculture, forestry and aquatic environment. Crop-specific problematic weeds...