High populations of alfalfa weevils have been found in alfalfa throughout the Nebraska Panhandle; lower populations were reported this week in central and eastern Nebraska. The economics would warrant continued scouting through June to provide for timely treatment, if necessary, and yield protection.
If high quality hay is your goal, don't delay harvest. However, if you're looking to rebuild your hay supply, letting it grow almost until bloom will provide more feed while using water resources more efficiently.
No-till seeding alfalfa can help preserve crop residue on the soil surface, reduce soil erosion, limit weed seeds on the soil surface, and perhaps most importantly this year, help conserve soil moisture.