ryegrass(redirected from ryegrass staggers)
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highly productive pasture grasses including Wimmera or annual ryegrass (Lolium rigidum), Italian ryegrass (L. multiflorum) and perennial ryegrass (L. perenne).
ruminants and horses grazing pastures dominated by L. perenne (perennial ryegrass) may be affected with a severe incoordination which appears with forced exercise but disappears if the animals are left to their own devices. Caused by tremorgen lolitrems from the endophyte Neotyphodium (Acremonium) lolii which infests the grass.