Even though the Lady Bugs are eating the aphids, there are not enough of them and they can not eat them fast enough. So, out comes the kitchen mix. (water, vegetable oil, hot sauce and organic soap.
The water is a carrier, the soap breaks up the oil into small particles, helping the mixture stick, and drying the insects natural fluids, the oils blocks the insect's breathing and the hot sauce irritates any area that it can. It should also make the plant less tasty for the insects that survive.
Our cats don't like it either. They ran out to see what I was doing and turned around about a foot away.
Yes, it washes away, but rain seems to be getting scarce so maybe it will stay longer. Actually though, I would prefer it rains and I have to re-apply.
The results are encouraging. Most of the aphids died. Those that remain will be Lady Bug food if the Lady Bugs can stand the hot sauce smell. Their larvae don't have a choice so they will stay and eat.