I often do little trials, but they don't involve extremes, for example I wouldn't trust teb as the primary azole in a program, so would always steer away from a total budget programme.ok will include a (small area im not doing 20ac !) no fungicide plot - I say no fungicide but its had that t0 crafter already so "no more" fungicide plot maybe more accurate
With regards to the rolls Royce programme, a few years ago my spray driver mixed up vivid and bravo pand reversed the rates. He ended up spraying a field with bravo at 0.35 and vivid at a litre/ha. This applied 250g/l of pyracalastrobin or 3 times the recommended rate (hgca at time were advocating about 80g/ha. The greening was tremendous, we had to combine it last and the yields were very good, although it was a high yielding year.
Not something you would do on a farm scale, but it was an interesting exercise
Would it not be in your own interest to have your own trial? Take 10ac and give it a low input spend for three years. It won't go wrong in any disastrous way and could save you a big pile of cash in the future.
If it doesn't work, then no harm done and now you know.