The Curl Grub Larvae has a cream body with a light brown head and they vary in size from 4mm to 40 mm when fully grown.The tail end of the grub may look darker brown which is due to the soil the grub has ingested during feeding. They are often incorrectly referred to as ‘witchetty grubs’. The grubs feed on plant roots in large numbers and curl up when disturbed. Larvae are most active during mid spring to mid summer, and can cause severe damage to lawns, gardens and potted plants.
In affected lawns grass turns yellow then brown and dies, and then the lawn can be lifted and rolled back like a carpet.Is this not the problem that you have? Go back to find the right one...