regulates regulation of anatomical structure morphogenesis modulation of formation of structure involved in a symbiotic process regulation of feeding behavior biological regulation formation of arbuscule for nutrient acquisition regulation of arbuscule formation for nutrient acquisition from host GO:0075329 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. Any process that modulates the frequency, rate or extent of symbiont arbuscule formation for nutrient acquisition from host. The host is defined as the larger of the organisms involved in a symbiotic interaction. biological_process