To examine the influence of two nitrogen timings: 40kg N/ha applied at tillering (GS22) or first node (GS31) or third node (GS 33) and four fungicide strategies on levels of yellow leaf spot (YLS).

The level of yellow leaf spot (YLS — Pyrenophoratritici repentis) control achieved with fungicides applied at either first node (GS31) or third node (GS33) in a susceptible wheat-on-wheat situation (cv EGA Gregory) was between 25–50% in most assessments.
• This relatively poor level of disease control has been consistent across the four years of research.
• There was no significant yield response to fungicide application during 2016, but there was a trend for small yield gains where fungicide was applied at first node (GS31), or third node (GS33) or applied twice at first node (GS31) and third node (GS33).
• These small (0.15–0.25t/ha) yield increases have been common across the four years of trials, either from a single later spray at third node (GS33) or from two sprays where a third node (GS33) application was preceded with a tillering (GS23) or first node (GS31) spray.
• A single YLS fungicide application at tillering (GS23), carried out as part of a weed control spray, did not generally prove to be economical.
• Nitrogen (N) applied at tillering (GS23) or first node (GS31) has not produced statistical yield differences, but delaying the main nitrogen dose until third node (GS33) reduced yield by an average of 0.5t/ha compared with the first node
(GS31) timing during 2016.
• There were no significant differences in YLS severity due to fungicide product — Tilt® (propiconazole) and Prosaro® (prothioconazole and tebuconazole) — or nitrogen timing.