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Rising CO2 Could Lower Forage Quality

Continued elevated carbon dioxide concentrations in the atmosphere may reduce forage quality among the world's grasslands and lead to reduced weight gain among animals, according to Agricultural Research Service scientists and cooperators. Their five-year study was published in the journal Ecological Applications. Plant physiologist Jack A. Morgan led the study with ARS colleagues and cooperators at Colorado State University. Morgan heads the ARS Rangeland Resources Research Unit in Fort Collins, Colo.

Proteins show promise for mosquito control

Mosquito abatement usually means one thing: blasting the pesky critters with pesticides. Those pesticides, although highly effective, can impair other organisms in the environment. Que Lan, insect physiologist at the University of Wisconsin-Madison, and her colleagues in the entomology department are working on a new, more targeted approach to mosquito control: inhibiting their ability to metabolize cholesterol. Cholesterol, the sticky substance that accumulates on the lining of human arteries, is an important component of cell membranes in vertebrates and invertebrates. In mosquitoes, it is vital for growth, development and egg production.



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