The Austronesian Comparative Dictionary

Loans: beetle: coconut beetle, coconut blight

Apparently a loanword from language__Tagalog into language__Ilokano, although the word is phonologically irregular in both language__Tagalog (where *-d- > r), and language__Cebuano (where *-d- > l).

WMP
Ilokano kadaŋ-kadaŋ coconut beetle
Tagalog kadáŋ-kadáŋ a fatal disease of coconut trees
Cebuano kadaŋ-kadaŋ blight affecting coconut trees; have coconut blight