What type of damage results from *Eriosoma lanigerum* feeding on the bark of young apple shoots?
Answer
Localized swellings or galls
When the woolly apple aphid population congregates on the bark of new growth, such as young shoots and twigs of apple trees, their continuous sap extraction activity disrupts localized cellular processes. This concentrated feeding action directly provokes the tree tissue to react by forming abnormal growths. These growths are specifically identified as localized swellings or galls developing directly in the areas where the aphid colonies are actively feeding on the underlying sap.
Related Questions
What is the sole sustenance extracted by all woolly aphids using their specialized mouthparts?What are the primary hosts for the woolly apple aphid, *Eriosoma lanigerum*?What specific reaction is triggered when the woolly elm aphid feeds on developing elm leaves in the spring?Where does the woolly apple aphid (*Eriosoma lanigerum*) conduct more insidious feeding that is often hidden from casual inspection?What is the key distinction in feeding strategy between *Eriosoma lanigerum* and *Eriosoma americanum* concerning location?When do winged forms (alates) of the woolly elm aphid depart the leaf galls to seek root infestation sites?What specialized host plant, commonly known as the Bradford pear, is listed as a secondary host for *Eriosoma lanigerum*?What term describes the tissue from which woolly aphids extract their nutrient-rich fluid?What type of damage results from *Eriosoma lanigerum* feeding on the bark of young apple shoots?Why does the continuous, protected feeding on elm roots likely represent a greater physiological impact than the temporary elm leaf galls?