Prevention of Ozone Injury to Plants by a New Protectant Chemical

Abstract

The new chemical N-[2-(2-oxo-1-imidazolidinyl) ethyl]-N''-phenylurea (EDU) protects plants against ozone injury. It was effective by foliage and root applications. Dose-response measurements on ''Pinto'' beans [Phaseolus vulgaris] treated by foliage spray showed that the ozone dose required to cause 50% leaf area injury (ED50) increased linearly with the quantity of this protectant applied. A 500 .mu.g/ml foliage spray to runoff increased the ozone resistance (ED50) of ''Pinto'' bean about 30-fold relative to unprotected controls.