What virus is believed to have caused the destruction of hundreds of thousands of honey bee colonies across north american and europe in 2007? (not deformed wing virus)

The right answer is Israeli acute paralysis virus, or IAPV.

The Israeli virus of acute paralysis, or IPVV, is a species of virus of the family Dicistroviridae that infects bees.

In 2007, a large study of dead beehives during the severe US bee mortality episode identified it as strongly correlated with mortality. Other works show that it affects the behavior of bees and disrupts homeostasis.