These chemicals also kill beneficial insects, increase the amount of pesticide in the environment and cost growers dearly in both time and money. They have a dark patch with metallic bronze markings at the end of each wing. You will rarely see any eggs. Grubs are less than two mm long when hatched, but reach up to two cm long when fully grown. You can tell if fruit contain codling moth grubs by the abundant frass seen on the outside of the fruit.
Cocoons are tough, white and stick firmly to the bark of the fruit tree.
Pupae are dark orange-brown and about one cm long. Codling moth would have three generations every year in Western Australia. The grubs over-winter cocooned in cracks and under bark of infested trees. The grubs hatch out and burrow into the fruit to reach the core where they eat the seeds. As the fruit develops so do the grubs.