What is "beetle bank"

n. (context agriculture English) A strip of land within a crop field or garden that is planted with grasses or perennial plants in order to provide a habitat for beneficial insects, birds, and other fauna.

A beetle bank, in agriculture and horticulture, is a form of biological pest control. It is a strip planted with grasses ( bunch grasses) and/or perennial plants, within a crop field or a garden, that fosters and provides habitat for beneficial insects, birds, and other fauna that prey on pests.