Spraying for leafhoppers

I have been planting a leafhopper resistant variety of alfalfa so I have never had to spray for leafhoppers before. This year I did not plant a resistant variety. This alfalfa was planted in late April and is about 10" tall and I'm now starting to see some symptoms of leafhopper damage. I really did not anticipate I would see any signs of leafhoppers until after the first cutting from what I had read. I'm now wondering if I need to spray now or is the damage already done? If I spray now will the alfalfa outgrow the symptoms? It's not big enough to even think about cutting.

Hayden

Spraying for leafhoppers