I also took a closer look at the spider web and saw a small black spider with one white spot on each side of it. The sap-feeding scale insect Unaspis euonymi is particularly attracted to Euonymus japonica, although it will feast on other evergreen euonymus too. They don't move and have a protective outer coating. You may see signs of the mature female insects on the stems. The white males congregate on the leaves, but the brownish-black females live on the bark, making them hard to spot. In autumn, its leaves turn a rich red and black berries are produced. They appear as brown or black patches on the stems. Aug 13, 2019 - Explore The Tree Center's board "Euonymus", followed by 13672 people on Pinterest. Euonymus scale. 9 Viburnum opulus. The white males are oval shaped, measure 1-2mm long and are generally to be found hanging around on the undersides of leaves. Euonymus scale are big enough to see with the naked eye. The leaves also attract aphids and their predators, including hoverflies, ladybirds and lacewings, as well as the house sparrow and other species of bird. The leaves are eaten by caterpillars of moths, including the magpie, spindle ermine and scorched, as well as the holly blue butterfly. Gathering and destroying fallen leaves usually controls this disease. These will appear as brown / black scales on the stems. See the picture below. However, I did notice black spots on the underside of affected leaves. Females look like brownish scales and they’re actually fixed to the spot - usually on tree bark or leaf stems. Plants that are under attack from euonymus scale will often have weak growth. The spider is so tiny, I can't get a good photo of it. Often these spots come together to form larger patches of dead tissue. See more ideas about Shrubs, Garden shrubs, Plants. Leaves Spotted, Turn Brown, Drop Prematurely due to Leaf Spot Leaf spot diseases caused by various fungi occasionally attack euonymus, causing yellow, brown or black dead blotches on their leaves. Tegula? Courtesy of reader Tamara S. Plants attacked by Euonymus Scale will generally grow poorly and leaves on the inner stems and lower down the plant will fall off. They may also lose leaves on the inner stems and lower branches. Wing membrane a trifle dusky because rather thickly fur nished with very minute scale-like objects. The euonymus could be having 2 problems--whatever is causing the black spots, and then also the spider, or it could be the same problem. Large numbers cause yellowing of the leaves, die-back and loss of vigour. Leave them for the birds, or use them to make wine or crumbles. Grow in a sunny spot and cut plants back to ground level every year in early spring. Antenna} black, third joint lon gest, a little longer than iv plus v; joints iv, v and basal part of vi subequal; apical part of vi a little longer than its basal portion, and only about half as long as third joint.