貯穀 ちょこく害虫 がいちゅうではありませんでした
chokokugaichūdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 貯穀害虫

1. Was not a grain pest.; Was not a stored-grain pest.

Past/Perfective
Negative
Polite
Formal Register