How did meg help defeat the nosoi in the orchard the hidden oracle?

In "The Hidden Oracle," Meg McCaffrey helps defeat the Nosoi, the spirit of disease, by using her powers as a demigod and her connection to nature. She channels the energy of the orchard, calling upon the plants and their healing properties to combat the Nosoi's effects. Additionally, her determination and bravery inspire others to fight back, ultimately leading to their victory against the disease-inflicting spirits. Meg's unique abilities and strong will play a crucial role in overcoming this supernatural threat.