Spring sown wheat and barley

To look at the potential yield of commonly grown varieties of barley and wheat sown in September, whilst comparing some different management strategies that might be adopted when sowing this late in the season:Look at the influence of adding Imidacloprid to a standard seed treatment for controlling a possible BYDV infection,To determine if sowing rate should be increased to compensate for less tillering,Could we optimise the amount spent on fungicides by going on at just one key timing?- GS32 or waiting until GS49 in barley- GS32 or waiting until GS39 in wheat