To examine nine elite lines under both untreated and HYC High input fungicide management based on a full foliar fungicide program preceded with a SDHI seed treatment (3 foliar fungicides – GS31, GS39, GS59-61 and Systiva seed treatment) and PGR management – split application Moddus 0.1 + Errex 0.65 – GS30 & GS32). 184kg N/ha was applied as a three split of nitrogen fertiliser application

• There was significant interaction between cultivar and fungicide programme with yield response to fungicide ranging from 0.1 t/ha (AGFWH004818) to 3.52 t/ha (Beaufort).
• Grain yields ranged from 4.70 t/ha (untreated Beaufort) to 12.37 t/ha (Reflection treated).
• The highest yielding white wheat was the new cultivar long season winter wheat RGT Waugh which gave a 2.39 t/ha yield response to the fungicide programme.
• The other white wheat seen as a longer season replacement for Trojan was Stockade which gave a 1.64 t/ha response with Septoria tritici blotch (STB) and stripe rust intermediate susceptibility.
• AGFWH004818 and AGTW0005 have been in HYC trials for three seasons and showed no significant yield response to fungicide application in a very high pressure disease season.
• Both are stiffer strawed and are more disease resistant than Big Red but until the very high disease pressure of 2022 has been slightly lower yielding than Big Red.
• All varieties gave an economic response to the four-unit fungicide application with the exception of the red wheat AGT00005 and AGFWH4818 with yield increases ranging from 1.21 t/ha with the UK wheat Reflection to 3.52 t/ha with Beaufort.
• When fungicide treated there was no statistical difference amongst the six highest yielding cultivars with RGT Accroc, Beaufort and GS-18-105W being significantly lower yielding.
• The principal diseases in the trial were STB and stripe rust with the latter disease more severe than in 2020 and 2021 due to a new pathotype (239).
• Beaufort STB infection was so severe that a full fungicide programme did not control the disease. To a lesser extent the fungicide programme was not fully effective with RGT Accroc and GS-18-105W.
• Test weights reflected fungicide response with large increases in test weights where there were greater yield responses to fungicide.

Trial design: Factorial (Variety x Management)
Rotation position: Following Carrots in 2021
Soil type: Chromosol
Colwell P (ppm) 0-10 cm: 302.0
pH (CaCl2) 0-10 cm: 6.66
Organic Carbon (%) 0-10 cm: 2.03