To assess the relative importance of fungicide input for Genesis 090 and PBA Monarch under overhead irrigation.

• Monarch was more responsive to fungicide strategies than Genesis 090 and gave significant yield increases of 0.42 t/ha (cheaper programme) and 1.72 t/ha (more expensive programme) which represented a 168 & 508% increase in yield over the untreated.
• Disease levels, principally Ascochyta (Ascochyta rabiei) at pre flower (V19) were low (<1% leaf area infected LAI) but increased later in the season with nearly 70% crop canopy infection in late October.
• The fungicide strategy based on more expensive chemistry containing SDHI (group 7) and QoI (Group 11) chemistry gave significantly better disease control and significantly higher yields than strategies based on chlorothalonil but only with PBA Monarch.
• Genesis 090 gave a yield increase to the more expensive strategy but the advantage over the cheaper chlorothalonil programme was not statistically significant.
• Both fungicide strategies gave significant improvements in control of ascochyta at 13 days after the final application compared to nil control treatment and produced significant improvements in grain yield.