用bark beetle造句子，“bark beetle”造句

As with the mountain bark beetle, it is not entirely clear why this is happening.

Spruce bark beetles have boomed in Alaska thanks to 20 years of warm summers.

genus of small bark beetles destructive especially to mature conifers.

Conifer bark beetles are able not only to recognize, but also to avoid non-host habitats, non-host species and unsuitable hosts by semiochemicals.

One hypothesis is that the yellow cedar decline may be caused by insect parasites, specifically the cedar bark beetle.