Yield reduction due to diseases and lodging and impact of input intensity on yield in variety trials in five cereal crops

Abstract Breeding of multi-resistant varieties to reduce yield loss due disease damage and lodging, reduction input intensity are high importance for a more sustainable cereal production. The aim this study was evaluate (i) caused by diseases lodging (ii) impact soil fertility in variety trials grown under two intensities. Intensity 2 treated with 1 without fungicides growth regulators. We applied multiple regression approaches based on mixed linear models. First, we estimated relative compared as function severity scores lodging. High reductions occurred winter wheat triticale, moderate rye barley low spring barley. potential highest yellow rust, followed brown Septoria tritici blotch. Medium identified dwarf leaf rust powdery mildew, nodorum blotch, Rhynchosporium well stem ear buckling. Second, differences did not affect across the range nitrogen fungicide application rates while higher at regulator fertility. Growth strongly related barley, however negative relation found. Soil showed strongest all crops.