Sudan grass aphid problems

[MagnoliaCattle18]

From north Mississippi. Need some suggestions on aphid control. Planted around 80 acres of Sudan grass last year for hay and had a bad outbreak of aphids. Long story short I should have cut it as soon as the aphids got bad but the weather never cooperated for me and was kind of a disaster. Between the black mold and the juice the aphids make the plant produce it wasn't real pretty. So got about 20 acres planted this year and curious about some suggestions as to control. Insecticide? Or is there really no goodway beyond cutting it when it get about so many aphids per square inch :???:

 

[ERNIBIGB]

Hard to control them. Spraying might be an option. I'm a little north of you in Tn and most have given up on the sudan hybrids. Can get one cutting before they hit and thats about it.