We have a 4' x 8' bed of strawberries and they were doing really well. Looked real healthy and lots of blossoms with lots of little strawberries coming on. All of a sudden, the leaves started curling up and majority of berries dried up and some plants look very dismal and some died and on the bigger ones, the leaves are curled up. Anyone, know what that might be? (My husband waters them daily with drip irrigation with good drainage.)Thanks, Karen