--- title: "hi! wondering if i should be concerned about these black spots on a…" description: "hi! wondering if i should be concerned about these black spots on a leaf of my monstera. i can’t remember if this on the sun facing side but no other leaves…" url: "https://getplanta.com/community/lKxUkhzRR_aIJD7o1QvtwQ/s_-bdsdkQP-jXx06Tkvqkw?language=ko" community: "Pests, diseases and problems" author: "fireside" published: "2024-02-20T01:33:02.964447Z" language: "en" image: "https://images.getplanta.com/v1/resize/rug_CP-OnWf_u-K3Q63vc5tzMVbuXQWb-mCV97LG8yA/U3e79qaUT2W-iGgdMHGuGQ.webp?size=large" --- [커뮤니티](https://getplanta.com/community.md?language=ko) / [Pests, diseases and problems](https://getplanta.com/community/lKxUkhzRR_aIJD7o1QvtwQ.md?language=ko) # hi! wondering if i should be concerned about these black spots on a… _fireside님이 2024-02-20에 게시함_ hi! wondering if i should be concerned about these black spots on a leaf of my monstera. i can’t remember if this on the sun facing side but no other leaves are affected so far. thanks! ![1개 중 1번째 첨부 파일](https://images.getplanta.com/v1/resize/rug_CP-OnWf_u-K3Q63vc5tzMVbuXQWb-mCV97LG8yA/U3e79qaUT2W-iGgdMHGuGQ.webp?size=large) ## 11개의 댓글 ### nosugartonight님이 2024-02-20에 댓글을 남겼어요. Are there other little white bugs on that leaf? I’m wondering if you may have thrips #### fireside님이 2024-02-20에 답변했습니다. i just checked and yes i do. i have some on both sides. should i cut off the leaf or the entire stem. my biggest worry is that i recently polished my leaves and used the same towel. do thrips spread easily? #### fireside님이 2024-02-20에 답변했습니다. and where would they have come from? the rest of my plants are fine ### fireside님이 2024-02-20에 댓글을 남겼어요. shoot. i actually see multiple on other leaves already. ### nosugartonight님이 2024-02-20에 댓글을 남겼어요. I’m not sure where thrips come from or a lot of pests. They just kind of “magically” have always appeared on my houseplants. (It’s not magical). I think they just exist everywhere or there in soil mix or something. I would cut off the diseased leaf and rinse the plant foliage including the stems or buy an insecticidal soap. If you’re just rinsing with water you should do that maybe twice a week. And monitor of course. Also quarantine that plant away from your others. Last thing you want is for them to spread. If you shared a towel cleaning leaves there is a possibility they were spread. I would examine the leaves of your other plants #### fireside님이 2024-02-20에 답변했습니다. should i repot in case of any in the soil? or just turn the pot on it’s side to rinse the leaves? and water the soil on its regular schedule ### Sunny님이 2024-02-20에 댓글을 남겼어요. That’s definitely thrips. They spread very quickly! Isolate that plant. It’s likely all the plants you wiped down will be infected. So, treat all of them with neem oil or simply spray down with insecticidal soap. You can use soapy Dawn dishwater to make your own insecticidal soap. It’s gentle on plants. The soapy water suffocates the thrips. Repeat the application a couple of times a week until they are gone. Thrips lay their eggs inside leaves. The eggs won’t be affected. So, they must be sprayed after the eggs hatch. It’s important to disinfect your hands before touching each plant since thrips are not easy to see. Of course, using one towel to wipe all the plants can spread more insects than just thrips. You should isolate the plant. But, assume thrips are already on all of your plants. Treat all the plants for thrips. Good luck!🍀🪴 #### fireside님이 2024-02-20에 답변했습니다. thank you!! #### Sunny님이 2024-02-21에 답변했습니다. You’re welcome! I use coffee filters to clean the leaves of hard water deposits. They are lint free and don’t leave paper fibers on my fuzzy leaf hoyas. You can get a lot of them for a low price at a dollar store. #### fireside님이 2024-02-21에 답변했습니다. oh that’s a really good idea! do you put any water or soap on the filters? i’ve just been using water and the plants were all fine. the monsters started to get affected about a month ago and i thought it was a single leaf burning up in the sun. was otherwise totally healthy and growing beautifully. wondering if using soap would be a better preventative measure. #### Sunny님이 2024-02-21에 답변했습니다. I use a 1/2 vinegar and 1/2 water solution to remove hard water deposits and fertilizer salts off the leaves. I add a little more vinegar if needed. Dawn dishwater can remove oils and dirt. The leaves can get translucent if they take in too much water. Monstera will release water droplets from their leaves to remove excess. --- _Planta 커뮤니티 (https://getplanta.com). 누구나 읽을 수 있습니다. 게시물을 올리고, 댓글을 달고, 좋아요를 누르려면 Planta 앱을 다운로드하세요: https://getplanta.com/download_