Macadamia nut borer
shell hardening is caused by the larvae which bore into the fruit. In small nuts the entire kernel is eaten, whereas in large fruit, part of the kernel may [...] dark spots on the body and the head capsule is brown. The pupa is dark brown and (if pupation takes place in the soil) encased in a cocoon of soil particles [...] moving from one fruit to another. This type of damage is small, and trees are able to compensate for damage because of the large volume of flowers and