Bridal wreath spirea, or Vanhoutte spirea (Spiraea x vanhouttei), is blooming in northern Illinois, and professional horticulturists should be watchful for the following being susceptible to control activities. Full bloom: Birch leafminer young larvae; elm leaf beetle young larvae; European pine sawfly feeding larvae; gypsy moth feeding larvae; pine needle scale crawlers (first generation), black turfgrass ataenius (first generation). Full to late bloom: Lilac (ash) borer newly hatched larvae; oystershell scale (brown) crawlers. Finishing bloom: Bronze birch borer newly hatched larvae. Most blossoms brown, still a few white: Flatheaded appletree borer larval hatch; peachtree borer newly hatched larvae; viburnum borer newly hatched larvae. Bloom finished: Oystershell scale (gray) crawlers.