Resources

The macadamia nut borer (Cryptophlebia ombrodelta) lays its eggs on the husk and the larvae burrow through the nut shell to eat the kernel. Macadamia nut borer (MNB) will cause premature nut fall, particularly during the oil accumulation stage (around December to February in Northern NSW). MNB also attacks mangroves, so pressure can be greater on farms adjoining mangroves.

This NSW DPI fact sheet discusses identification, damage and management of macadamia nut borer.