The days of beetles and roses

Help, I have Japanese beetles on my roses. . . I went on line and found that you can spray them with soapy Dawn dish detergent water and pick them off, dropping them into a bucket of soapy water. . . well, thus far I have several floating face down in the bucket.  that was this evening  - the article said that morning is the best time to do this, for they are still sleepy ~  sleepy???  Well, in the morning I will spray again and brush them off into the bucket - perhaps, just perhaps I can win this war...   If not, I'm going after the real stuff that kills everything in sight!!!!  This is war!  paulette