---
title: "My philodendron developed these black and yellow patches almost…"
description: "My philodendron developed these black and yellow patches almost overnight. Any ideas what it is and what I should do to treat it? I watered it three days ago…"
url: "https://getplanta.com/community/lKxUkhzRR_aIJD7o1QvtwQ/r-nbeI0VQYWt-GgHf3fpLg?language=ko"
community: "Pests, diseases and problems"
author: "Mark D"
published: "2024-04-30T22:45:07.471247Z"
language: "en"
image: "https://images.getplanta.com/v1/resize/OYCclxd3ZdoBo82kolqAeiqpVwlWMGFGARUt8kud8xc/BYuJXIR5TUi5fh1YdYSO3A.webp?size=large"
---

[커뮤니티](https://getplanta.com/community.md?language=ko) / [Pests, diseases and problems](https://getplanta.com/community/lKxUkhzRR_aIJD7o1QvtwQ.md?language=ko)

# My philodendron developed these black and yellow patches almost…

_Mark D님이 2024-04-30에 게시함_

My philodendron developed these black and yellow patches almost overnight. Any ideas what it is and what I should do to treat it? I watered it three days ago and misted the leaves today.

![3개 중 1번째 첨부 파일](https://images.getplanta.com/v1/resize/OYCclxd3ZdoBo82kolqAeiqpVwlWMGFGARUt8kud8xc/BYuJXIR5TUi5fh1YdYSO3A.webp?size=large)

![3개 중 2번째 첨부 파일](https://images.getplanta.com/v1/resize/OYCclxd3ZdoBo82kolqAeiqpVwlWMGFGARUt8kud8xc/XztuwKxFS9GTuR-wPH1dVw.webp?size=large)

![3개 중 3번째 첨부 파일](https://images.getplanta.com/v1/resize/OYCclxd3ZdoBo82kolqAeiqpVwlWMGFGARUt8kud8xc/fuY5dACbRoiVPyP3_yuAww.webp?size=large)

## 5개의 댓글

### Sunny님이 2024-05-01에 댓글을 남겼어요.

Looks like Bacterial (or fungal) leaf spot infection which creates yellow circles with black centers that spread. Both can grow with too high humidity, low air circulation and misting. All three keeps water on the leaves too long. Misting and high humidity environments promote bacterial/fungal growth.

I recommend:  
\- Stop misting. Use a humidifier when the plant needs more moisture.  
\- isolate the plant  
\- cut off the infected leaves (use gloves)  
\- disinfect hands/tools🍀🪴

#### Mark D님이 2024-05-01에 답변했습니다.

Thank you! I was probably a bit aggressive is the amount of misting I did more recently.

#### Sunny님이 2024-05-01에 답변했습니다.

I never mist unless I’m trying to mist seedlings or propagate succulent leaves. My average relative humidity this time of year is 85 percent. It’s about 65 percent inside. So, I run a ceiling fan 24 hours a day in the rooms with my plants.

#### Mark D님이 2024-05-01에 답변했습니다.

I live in Southern California and the humidity is low.

#### Sunny님이 2024-05-01에 답변했습니다.

Then, it’s probably just misting and not high humidity causing the bacterial/fungal growth.

---

_Planta 커뮤니티 (https://getplanta.com). 누구나 읽을 수 있습니다. 게시물을 올리고, 댓글을 달고, 좋아요를 누르려면 Planta 앱을 다운로드하세요: https://getplanta.com/download_