Which trap crop used for red hairy caterpillar in Groundnut?

Correct option is A

Cowpea (Vigna unguiculata) is employed as a trap crop to manage red hairy caterpillar infestations in groundnut (peanut) fields.
· The red hairy caterpillar, scientifically known as  Spodoptera mauritia, is a significant pest that damages groundnut crops. By planting cowpea, which attracts the red hairy caterpillar, farmers can monitor and control the pest more effectively.
· The larvae of the caterpillar are drawn to the cowpea plants, allowing for early detection and management before they can spread to the main crop, thus reducing overall pest damage.