Effect of residue management on wetness duration and ascocarp production by Pyrenophora tritici-repentis in wheat residue.

No-till, mowed, and disked residue treatments were applied to wheat residue infested with Pyrenophora tritici-repentis in fields near Manhattan, KS, in 1988 and 1989. Ascocarp production by P. tritici-repentis and straw-wetness duration were studied in relation to these treatments and four straw positions relative to the soil surface (above-soil and near-soil; upper part and lower part of standing stubble). Ascocarp production, estimated by counting ascocarps on sampled straw, was significantly affected by straw position and tillage treatment []