Adult beetle forms (male and female) are trapped before flowering which helps to reduce infestation levels. The main culprits are grubs causing serious damage to all cane fruits but mainly raspberries and blackberries. Damaged ripe berries have greyish-brown dried up patches at the stalk end. A brownish-white grub, up to 8mm (about1/4in) long, may be found inside the fruits. Contains one trap and one lure.