This scale infest euonymus including winter creeper, vining, and shrub euonymous.
Euonymus scale females are brown, oystershell-shaped,about 1/8 inch long, and most common on twigs and branches. Males are white, elongate, about 1/8 inch long, and numerous on both leaves and branches. The scale causes the foliage to develop yellowish green spots. Heavy infestation results in early foliage drop and often stems are killed.
Females over winter and lay eggs in the spring. The eggs hatch about early June in Northern Illinois. Crawlers emerge and move onto new growth or can be blown by wind to other plants. There is one generation per year.
Severe pruning can sometimes elinate or severely reduce infestations. Insecticides can also be used. Treat when catalpa trees are in early bloom.