I picked up this account late last year and I think I put down one application of 123 and a fertilizer. The client had new sod installed last summer. (tiny lawn) which looks mostly KBG and is still somewhat dormant. There are some spots of powdery mildew mostly along the house and near some arborvitaes. I went there this morning and there are dandelions everywhere. i am assuming they were in the soil before the sod went down. The soil test indicates OM at 4.9% pH 6.4, buffer ph 7.0, Ca 79.3%, CEC 6.9 What can I do to get rid of them?