White “stuff” On My Indoor Lemon Plant

Question

I have an indoor lemon plant and there are white spots on the leaves and limbs. It can be removed with a shower and by my fingers. What is it and how is it removed?

Answer 1

It could be powdery mildew or a scale insect. Powdery mildew looks like talcum on the leaves. It is a fungal disease, usually from too much shade. Since yours is indoors, it may not be getting enough light.

There is a cushiony scale insect that leaves white spots. Here is info on both problems that should help:

https://www.gardeningknowhow.com/edible/fruits/citrus/controlling-citrus-scale.htm

https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm

https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm