Black cherry aphid

The black cherry aphid (Myzus cerasi) is a common sucking pest belonging to the Aphididae family. It is a highly specialized insect that targets stone fruits, causing significant damage to young vegetative growth and potentially compromising the overall health of the tree.

This pest primarily attacks cherry and sweet cherry trees. The aphids congregate on the undersides of leaves and on tender new shoots, rapidly multiplying and causing severe stress to the host plant through constant sap extraction during the growing season.

The lifecycle begins with overwintering eggs located near buds. As spring arrives, the eggs hatch into fundatrices. Through a series of generations, the aphid population peaks, involving both wingless and winged forms that allow the infestation to spread throughout the orchard.

Typical symptoms of infestation include tightly curled, blackened, and necrotic leaves. The aphids excrete honeydew, which encourages the growth of sooty mold, blocking light and further impairing the tree's ability to photosynthesize and develop healthy fruit.

• Pruning suckers and water sprouts where aphids first establish.
• Applying systemic insecticides during the pre-bloom stage.
• Encouraging natural predators such as ladybirds and lacewings.
• Using sticky bands on tree trunks to stop ant-mediated aphid transport.
• Regular orchard scouting to detect early infestations before leaf curling.

Effective management requires proactive monitoring and timely intervention. Once leaves have curled, contact insecticides become largely ineffective, making early application strategies essential for maintaining tree vigor and fruit quality throughout the harvest period.