formation of infection structure haustorium neck formation https://github.com/geneontology/go-ontology/issues/18557 GO:0075197 formation of symbiont haustorium neck for entry into host The assembly by the symbiont of a neck-like structure for the purpose of penetration into its host organism. The neck-like structure connects haustorium mother cell and haustorium. The host is defined as the larger of the organisms involved in a symbiotic interaction. Note that this term should not be used to annotate gene products of the host. It should only be used to annotate those gene products from the symbiont involved in this process. symbiont haustorium neck formation for entry into host biological_process