Honeysuckle vine is a favorite with gardeners because of its sweet-smelling flowers and appeal to hummingbirds and butterflies. The native trumpet honeysuckle is easily contained and pruned. The invasive Japanese honeysuckle will overtake your garden in a season. Both vines, whether native or invasive, are vigorous and hardy, but there are diseases that can affect their growth.
If new growth on your vine appears stunted or unsightly, it is probably infected with the honeysuckle aphid. There may be hundreds of the pest on a single terminal shoot. Pesticides labeled for aphids will take care of the bugs, as will preventive pruning done before May 1. Pruning in the summer will just stimulate new growth, giving the aphids fresh feeding grounds.
Inadequate air circulation or sunlight can cause powdery mildew to appear on your vine. This fungus appears as a gray or white powder on top of leaves. The vines leaves may turn yellow or brown and drop off. A fungicide can control powdery mildew, but fixing the growing conditions will cure it.
Gray mold can kill flower parts, buds, leaves and shoots on the honeysuckle vine. It appears on plants that are growing in too-wet or humid conditions. Gray mold appears as a gray, thin webbing that releases clouds of dust when disturbed. Fungicides are fairly ineffective on gray mold. Remove any infected leaves or twigs and place in the trash. Do not compost.
Fungi or bacteria can cause leaf spots on the honeysuckle vine. The spots may be either ragged or circular, often with yellow edges or a water-soaked appearance. Water your plant from below, clean your garden tools and make sure your plant has good air circulation.
Scale insects infect the honeysuckle vine's stems and branches. What may look like crusty bark is really thousands of these pests in a cluster. Use a horticultural oil spray in the spring to get rid of scale.