For applications like spraying fungicide for fusarium head blight (FHB) suppression, using a wye adapter can provide excellent results in coverage.

Studies show using two spray tips, one spraying forward, one spraying back at 30° angles provides excellent coverage on some applications like FHB suppression.

Effectively, using a slightly coarser tip spraying forward provides good coverage on the front (and back) of a head of wheat, as given the extra angle and distance to crop, the spray pattern shears in the wind and sprayer speed nearby where the wheat heads are. This sheared spray pattern can then distribute successfully on the head.

For the spray tip going backward, it is marginally less effective than the spray tip going foward, but can produce excellent fill-in coverage on both the front and especially the back of the head of wheat.

So, in short, consider spraying with higher water volumes, with slightly coarser droplet sizes both forward and backward with a wye adapter to get better all around coverage for applications like Fusarium Head Blight.

Notably, for applications that require similar coverage levels but require penetration into a thick canopy, using two spray tips straight down typically provides better coverage.