Abstract
The response of 2 populations of B. sterilis L. seed to light at 15.degree. C was studied over 12 mo. when seeds were stored at different temperatures. White and red light inhibited the germination of both collections of seed, inhibition persisting for longer periods at low (4.degree. C) than at high (23.degree. C) temperatures. The 2 populationss of seed behaved similarly in their response to all light treatments.