What Is This Disease Please?

Question

Hi, I am a novice grower, in my 3rd year of growing a variety of different flowers and veg. Just this morning I have noticed these markings on my plants. It doesn’t rub off and I can’t see that it’s a mite. A slug has over the past week managed to get into my green house And do some damage but besides that the only other change i can think of is that I hadn’t zipped up my greenhouse before a windy hail and rain storm the other day. The last picture is everything that looks like it has these markings from my little green house, even if only slight, so a variety of different plants, not just veg, I have placed separate from my healthy seedlings in case it’s a disease and I need to dispose of them. If it is though please can you let me know if it’s safe to use the same pots again and if so any measures I should take as I am in desperate need and have more things to try growing. Thank you.

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Answer 1

It is leafminer damage. Simple leafminer control methods will suffice.

Here is an article that will help:

https://www.gardeningknowhow.com/plant-problems/pests/insects/leaf-miner-control.htm