1. Is the wilting of the leaves normal, if not how can it be controlled? 2. How can I increase the size of the fruits?

Owuraku Yeboah Pls remove the older leaves and ck if you see any white creatures like Mealybug, that sucks plant sap. As a consequences, plant starts drying out or wilting. Remove also weeds from your field then apply a light irrigation. Third, if you want to increase size of your papaya fruits, you need to thin out some deformed, infected or ill heath fruits. It helps in the process of increasing the sizes of rest of the fruits!! That's it 😁🌾