Effects of Ethylenediurea on Snap Bean at a Range of Ozone Concentrations.

Ethylenediurea (EDU) [N-[2-(2-Oxo-1-imidazolidinyl)ethyl]-N'-phenylurea] often protects plants from visible foliar injury due to the air pollutant O , and it has been used to demonstrate yield losses from O under field conditions. A few studies, however, have indicated that EDU can suppress plant growth and yield. Because of the potential value of EDU as a research and assessment tool, controlled field experiments with snap bean (Phaseolus vulgaris L.

Adaptation of a white clover population to ozone stress.

White clover (Trifolium repens L.) 'Regal' and tall fescue (Festuca arundinacea Schreb.) 'Kentucky 31' were grown together in a field and exposed for two seasons in open-top chambers to six ozone (O ) regimes ranging from 0.