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Acanthoscelides pallidipennis

Bruchid beetle Acanthoscelides pallidipennis

Description

Acanthoscelides pallidipennis is a species native to North America that has expanded its range to Europe and Asia. In Europe, it was first recorded in Bulgaria and later in Hungary and other countries. The beetle has a bivoltine life cycle, with adults emerging in mid-summer and again in early autumn. Females lay eggs on the pods of trees in the genus Amorpha, such as Amorpha fruticosa (main host), Amorpha californica, and Amorpha canescens. Larvae feed inside the seeds, consuming a significant portion of them. Heavy infestations can significantly reduce the plant’s reproductive success.

Symptom

Affected seeds exhibit internal cavities caused by larval feeding. Distinct exit holes on the seeds. Pods may appear normal externally but are light due to hollowed seeds. Severe infestations result in reduced seed production and viability and visible frass within pods, distinguishing it from similar species.

Tree Species: False Indigo Bush

Part of a plant- attacked: Fruit / Seed

Pest significance: Harmful

Pest Category: Insects

Invasive Species: Yes

Present in EU: Yes