Tradi t ional weed control in agric u l t u r e ha s b e e n a c c o m p l i s h e d primarily through the use of chemical herbicides and cultivation. Cultivation practices are of little use for weed control in turfgrass management. Turf managers, therefore, tend to rely heavily on chemicals for weed control. Chemical herbicides tend to exhibit rather broad spectrum characteristics. Two common ...

Author(s): Judith H. Myers, James N. M. Smith, Joseph S. Elkinton, Trevor Williams, Rosemary S. Hails, Bradford A. Hawkins, Michael E. Hochberg and Matthew B. Thomas Reviewed work(s): Source: Science, New Series, Vol. 265, No. 5173 (Aug. 5, 1994), pp. 811-813 Published by: American Association for the Advancement of Science Stable URL: http://www.jstor.org/stable/2884331 . Accessed: 17/05/2012 ...

Four uniform fungicide trials were planted in Michigan during 3 – 8 Oct 2005. The sites were at the Plant Pathology Farm, East Lansing MI, (inoculated with Fusarium graminearum and mist-irrigated); Bean and Beet Farm, Saginaw, MI (inoculated/not-irrigated); Sanilac, Sanilac County, MI and at Williamston, Ingham County, MI (not-inoculated/not-irrigated). Caledonia wheat, treated with Thiram 42S ...

Coccinellids have been widely used in biological control for over a century, and the methods for using these predators have remained virtually unchanged. The causes for the relatively low rates of establishment of coccinellids in importation biological control have not been examined for most species. Augmentative releases of several coccinellid species are well documented and effective; however...

Biological control is the deliberate use of natural enemies to reduce the number of pest organisms. It comprises methods that have gained acceptance for controlling nuisance arthropods partly due to the emergence of insecticide resistance and also because people have become more aware about the need to limit environmental pollution. In the case of arthropod-borne disease vectors, biological con...

At present there exists a large gap in size, performance, adaptability and robustness between natural and artificial information processors for performing coherent perception-action tasks under real-time constraints. Even the simplest organisms have an enviable capability of coping with an unknown dynamic environment. Robots, in contrast, are still clumsy if confronted with such complexity. Thi...

William F. Fagan Mark A. Lewis Michael G. Neubert and P. van den Driessche Department of Biology, Arizona State University, Tempe, AZ 85287±1501, USA. Tel. 480-965-8263. Fax +480-965-2519. E-mail [email protected] Department of Mathematics, University of Utah, Salt Lake City, UT 84112, USA. Current Address: Department Mathematical Sciences and Department Biological Sciences, University of Alberta,...

Plant diseases need to be controlled to maintain the quality and abundance of food, feed, and fiber produced by growers around the world. Different approaches may be used to prevent, mitigate or control plant diseases. Beyond good agronomic and horticultural practices, growers often rely heavily on chemical fertilizers and pesticides. Such inputs to agriculture have contributed significantly to...