Physiologic leaf spot of wheat. Sleepy wheat syndrome causes small grain plants to exihit prostrate growth herbicide application. Initial symptoms generally appear within 3 to 5 days of application. Sleepy wheat is not uncommon, but even long time users may have never seen symptoms. Under normal conditions, the plants resume upright posture 5 to 14 days after the symptoms are noted.
Small grains are most susceptible when they are growing rapidly.
Surfactant can increase the severity of sleepy wheat syndrome. It is also observed with sulfonylureas, phenoxy, and bromoxynil products. Banvel and Banvel SGF are powerful plant growth regulators. Inc. Western Region, May 1993. Hot days, cold nights blamed for burnt wheat.