BACKGROUND Pesticide use on urban lawns and gardens contributes to environmental contamination and human exposure. Municipal policies to restrict use and educate households on viable alternatives deserve study. We describe the development and implementation of a cosmetic/non-essential pesticide bylaw by a municipal health department in Toronto, Ontario, Canada and assess changes in resident pra...

Fertilized home lawns represent a potential source of NO,-N contamination to groundwater and surface waters. The waterborne losses of inorganic N from Kentucky bluegrass (Poa pratensis L.) turf subjected to three levels of N fertilization (0, 97, and 244 kg N ha"' yr~' as urea and methylene urea) and two irrigation regimes (scheduled by tensiometer and overwatering with 3.75 cm of water per wee...

Abstract Lawns as a landcover change substantially alter evapotranspiration, CO 2 , and energy exchanges are of rising importance considering their spatial extent. We contrast eddy covariance (EC) flux measurements collected in the Denver, Colorado, USA metropolitan area 2011 2012 over lawn xeric tallgrass prairie. Close linkages between seasonal vegetation development, fluxes, net ecosystem ex...

Consumers desire low-input turfgrasses that have tolerance to both shade and drought stresses. Several sedges ( Carex sp.) nimblewill Muhlenbergia schreberi ) are native plants prevalent in dry woodland ecosystems Oklahoma, USA, may potential as alternatives conventional species shaded turfgrass systems. To evaluate selected for this purpose, a multilocation field trial was conducted Stillwater...

Surface exclusion is the mechanism by which F plasmids prevent the redundant entry of additional F plasmids into the host cell during exponential growth. This mechanism is relaxed in cells that are in stationary phase. Using genetically marked F' plasmids and host strains, we extend this finding to Escherichia coli populations during extended nonlethal selection in bacterial lawns. We show that...