regulates regulation of anatomical structure morphogenesis modulation of formation of structure involved in a symbiotic process modulation by symbiont of entry into host biological regulation penetration hypha formation regulation of penetration hypha formation https://github.com/geneontology/go-ontology/issues/21121 biological_process 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. modulation of symbiont penetration hypha formation for entry into host Any process that modulates the frequency, rate or extent of symbiont penetration hypha formation for entry into host. The host is defined as the larger of the organisms involved in a symbiotic interaction. GO:0075202