Effect of fungicides on the black point problem, in spring wheat (Triticum aestivum L.), planted on irrigated soils in the south-·|central area of Chile

Mario Mellado Z. 1 , Andrés France I.1 e Iván Matus T.1

At the Ouilamapu Experiment Station (INIA). Chillán, Chile, four field experiments were carried out, to study the possibility of controling the black point problem, using fungicides applied to the seeds and the plants. The spring wheat variety "Cisne-INIA" was used, because this genotype normally presents th is problem.
The trials were set under irrigated conditions, in a split plot design with three replications. The treatments were two: healthly kernels and kernels affected by black point. The subtreatments were five fungicides plus a check, without fungicide.
The most important conclusions were:
- Seed germination, grain yield and its components, were not affected by black point.
- Fungicides applied to the seed and the plant, did not control black point.
- In kernels with black point, Alternaría sp. was the most frequently isolated microbial genus.

1 Estación Experimental Quilamapu (lNIA), Casilla 426, ChiIián, Chile.