Indeed, Don.
That was the clothing spray thread some weeks back you posted that on...
Back in Korea, they gave guys small cans of DDT to powder their privates on the battle field to rid themselves of body lice, etc!
We've learned much, but have invented even more deadly stuff...which is why I'm not going to play and asked here and got some professional advice on dilution.
Now I'm waiting on some 3ml/cc syringes to draw out the required 2:280ml ratio before mixing!
Sorry for the family tragedy of your Uncle's experience.