My Nellie Kelly Passionfruit Have Large Sunken Brown Spots And The Leaves Are Yellowing In The Affected Area Of The Plant. Can You

Question

tell me what it is and how to treat it please.

Answer 1

Unfortunately your photos did not come through. This does sound a bit like Alternaria spot from your description, though. That or Xanthomonas bacterial spotting.

Alternaria Can be treated with a fungicide and cleanup of debris. While Xanthomonas will only be treated by proper cleanup.

https://www.gardeningknowhow.com/plant-problems/disease/alternaria-leaf-spot.htm

https://www.gardeningknowhow.com/plant-problems/disease/bacterial-leaf-spot.htm

https://www.gardeningknowhow.com/ornamental/vines/passion-flower/passion-flower-care.htm