The bug buries inside the trunk and the the trunk within a year becomes swiss cheese!
Read about the morus nigra on:
http://www.agric.gov.mt/Documents/Biedj ... r%2005.pdf
and about the b"""""tard bug on the following:
http://www.agric.gov.mt/Documents/Biedj ... ju%2004.pd
One should really take care of his morus nigra and if you have one be sure to check out how to control these bugs. (not very effective in my opinion).
If maybe one has the picture of the larva or the bug. What really befuddles me is that this bug managed to kill 3 morus nigra and i never got to see the bug.
And finally sorry if the mags are in maltese and sorry if i have no pics but (you could at least look how it likes by downloading the mags).
Take care of your morus.
Tchuss, goodbye and aufwiedersehen!