Question

Since the 1990s, ________ have killed an estimated 30 billion conifers in the western United States.a) ladybird beetles b) forestersbark beetles c) invasive fungipine d) shoot beetles.

Answer 1

b) foresters bark beetles

Step-by-step explanation:

Tree mortality caused by bark beetles has increased in lodgepole, spruce and ponderosa forests. This increase is correlated with shifts in temperature, this causes extensive tree mortality due to the action of the bark beetles, there are more than 600 species of bark beetles and US agencies are trying to understand and mitigate the effect of this insect in the conifer population