The effect of seeding date and Ieaf rust (Puccinia coronata Cda.) on oat grain yield at the Arauco Province, Chile

Ricardo Madariaga B.1, Mario Mellado Z.1, Hernán Chamorro G.1, Luis Barrales V.2 y Edmundo Beratto M.3

Trials carried out at the Puyehue Experimental Field, Cañete (Lat. 37º54’ S), showed that: (1) Peragoid, a variety susceptible to leaf rust,reduced severely grain production due to this disease, compared to Nehuén, which is resistant, that was not affected in grain yield, by this rust; (2) early varieties, like Nehuén, must be planted between June and August; and (3) late varieties, Iike Peragold, must be sown during May and June, to obtain high grain yields.

1 Estación Experimental Quilamapu (INIA), Casilla 426, ChiIlán, Chile.
2 Estación Experimental La Platina (INIA), Casilla 5427, Santiago, Chile.
3 Estación Experimental Carillanca (INIA), Casilla 58-D, Temuco, Chile.