Research by the Institute for Agricultural, Fisheries and Food Research (ILVO) in Belgium has shown that new varieties of Italian ryegrass are outperforming older ones in terms of yield, persistence, rust resistance, and digestibility. The trial, which involved growing all grass varieties registered in Belgium, along with some popular ones from abroad, found that the newer varieties also performed better in dry conditions, yielding 1.5 to 2 tonnes more dry matter per hectare annually. They were more persistent, formed fewer stems, and were more rust tolerant. However, two varieties from Italy and Poland performed less well than Belgian varieties. The research emphasizes the importance of grass breeding for dairy farmers and highlights the need for choosing the right variety to ensure sufficient and nutritious grass, especially with the challenges of extreme weather and stricter fertilization standards.