We've conducted testing of a variety of entomopathogenic fungi.  Some are
heat sensitive, which in at least one case seemed to be way the fungi had
little or no effect on honey bees, but had devastating effects on
greenshouse bumblebees.

Not sure of the temperature range tolerated by M. anisopliae.

Interesting side note.  General consensus is that these pathogens are
relatively host specific (one or a small number of target hosts, maybe an
insect group with some common features -- soft integument, alkaline guts,
etc.).   As such, they present little risk to higher animals.  But, one of
my colleagues who worked overseas found a Metarhizium that unexpectedly
killed rats!!

Needless to say, that report got some attention.  Rare case, but it can
happen.

Jerry

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