This scientific article presents information on how Sphinx ligustri (Linnaeus, 1758) shows different sizes at different stages of development in relation to feed. Plant species with the highest nutritional value have been identified for Sphinx ligustri (Linnaeus, 1758). When feeding with various feeds (within 21-23 days), the highest rate was in the larvae of the Sphinx ligustri, which were fed with the Syringa plant. The larvae that fed on this plant increased very quickly. The duration of diapause was also shorter than in larvae feeding on other plants.