Black Spots On Underside Oregano Leaves

Question

I have found lots of tiny black spots and a sort of white substance on the underside of my oregano leaves. They seem to then dry out and fall off. I’ve picked out the ones that look like they have it but it’s quite wide spread across a couple of plants. When I wipe them with water and a piece of kitchen towel they seem to come off as a smudgy brown/green colour on the kitchen towel. I’m not sure if it’s a fungus or insect and what to do to stop it spreading. Any advice greatly appreciated!

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Answer 1

This looks to be Spider Mites, and its eggs! This can be quite the problem, so immediate treatment is required. These articles will help you:

https://www.gardeningknowhow.com/plant-problems/pests/insects/spider-mite-treatment.htm

https://www.gardeningknowhow.com/plant-problems/pests/insects/spider-mite-control.htm

https://www.gardeningknowhow.com/plant-problems/pests/pesticides