Until very recent years insects and their allies have been considered as
of economic importance merely in so far as they are an annoyance or
direct menace to man, or his flocks and herds, or are injurious to his
crops.
of economic importance merely in so far as they are an annoyance or
direct menace to man, or his flocks and herds, or are injurious to his
crops.
Beiträge und Kommentare