REFERENCES tions arising from the intluences of host and parasitoid phenologies (3). Single values cannot characterize host-parasitoid interactions, and maximum values are unlikely to be typical over longer times or in different areas (4). 4) Contrary to the prediction made by Hawkins et al., successful biological control can result from the use of agents that are characterized by low rates of ...

Mexico is a megadiverse country that forms part of the Mesoamerican biological corridor that connects North and South America. Mexico's biogeographical situation places it at risk from invasive exotic insect pests that enter from the United States, Central America, or the Caribbean. In this review we analyze the factors that contributed to some highly successful past programs involving classica...

6 Biological motor control can be characterized as a problem of con7 trolling nonlinear, unreliable systems whose states are monitored 8 with slow and sometimes low-quality sensors. In response to 9 changing sensory inputs, internal goals, or motor errors, the motor 10 system must solve several basic problems: selection of an appro11 priate action and transformation of control signals from sens...

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...