Poplar brown aphid

Systematic position: Chaitophorus populeti belongs to the order Hemiptera and the family Aphididae. It is a specialized pest that maintains a close biological relationship with trees within the Salicaceae family, specifically focusing on the Populus genus.

Host plants: This aphid primarily infests various species of poplar trees, including black poplar, white poplar, and silver poplar. In nursery settings and urban landscapes, infestations can be severe, impacting the health and aesthetic value of the trees significantly.

Biology and lifecycle: The species overwinters as eggs deposited on the bark of twigs. In the spring, stem mothers hatch and initiate several generations of viviparous females. During the summer, winged forms appear, which facilitate migration to other parts of the host tree or nearby trees. As autumn approaches, sexual forms produce the eggs for the next cycle.

Nature of damage: Chaitophorus populeti feeds on plant sap, causing leaves to curl, yellow, and eventually drop prematurely. The accumulation of honeydew secreted by the aphids serves as a substrate for sooty mold, which blocks sunlight and interferes with the tree's photosynthetic processes.

Protection measures: Integrated pest management is key to controlling this aphid. Recommended strategies include:

• Pruning and destroying heavily infested branches.
• Applying systemic insecticides during early spring outbreaks.
• Encouraging natural predators such as lady beetles, lacewings, and hoverfly larvae.
• Monitoring tree vigor to ensure the trees can withstand mild infestations.