CELASTRUS INSECTS
CELASTRUS INSECTS
Euonymus scale cause leaf yellowing followed by plant death. The insects are not readily seen and so can build up to large numbers before they are noticed. Dormant oil controls scale and is less harmful to predators. Apply Sevin or malathion when crawlers are active. The preferred method of control involves regular inspection for early detection of the infestation then spraying with dormant oil.
Oystershell and San Jose scale may also infest bittersweet. Control with dormant oil applied in spring before growth starts. Oystershell scale crawlers are controlled by sprays of malathion or Sevin. Other scale crawlers are controlled by sprays of Sevin. The preferred method of control involves regular inspection for early detection of the infestation then spraying with dormant oil.
Aphids suck plant juices, and heavy infestations distort new growth and cover the leaves with sticky honeydew. Use sprays of rotenone and malathion. The insects can be dislodged with a high pressure water spray from the garden hose.
