However , it is unclear how the fungus becomes associated with the bark beetles that eventually make their way into the phloem of oak trees .
The beetles may also be responsible for dispersing conidia spores among coast live oak trees .
It is unclear how the fungus becomes associated with the bark beetles that eventually make their way into the phloem of oak trees .
The beetles may also be responsible for dispersing conidia spores among coast live oak trees .