 Three Amylostereum species are symbionts of wood wasps in the genera Sirex , Urocerus , and <unk> , which infest conifers . The female wood wasps deposit their eggs together with fungal spores and <unk> in trees , and the fungus is eaten by the wasp 's larva as food . The fungus <unk> <unk> through the formation of <unk> spores in newly emerged females that are stored in special structures adapted for the transport of symbiotic fungi . The A. areolatum – Sirex <unk> ( S. noctilio ) symbiont complex has been studied extensively because of its potential to cause substantial economic losses in the forestry industry , particularly in non @-@ native regions . 
