The Neodiprion abietis Gammabaculovirus (Baculoviridae: NeabNPV) is virulent. highly contagious. and infects only midgut epithelial cells of balsam fir sawfly larvae. but infections can carry through to adult sawflies in the midgut. https://pipingrockers.shop/product-category/evening-primrose-oil-gla/