Just a heads up that in some cases where Juniper Evergreen damage occurs it might not be one of the list of culprits first considered such as Drought, Winter damage, Dog Urine, Transplant shock or Damaged branches. It may be Juniper Tip blight. It is a fungus that overwinters in small black fruiting bodies on stems and needles affected the previous year. Spores are released during wet weather (wet spring weather) or via overhead irrigation. Infection occurs in the fall, symptoms appear in spring. Look for black fruiting bodies on stems and prune out affected stems with a bleach cleaned bypass pruning shears. Adjust automatic irrigation heads so away from the plants and consider a good all purpose fungicide.