What Causes Brown Spots on Lemons

A: Brown spots or lesions on citrus usually mean one thing: brown rot. … Brown rot is a disease that affects all parts of the tree, but is most often observed on the fruit. It is transmitted via various forms of the pathogen, Phytophthora, which resides in the soil.

How do you treat brown spots on lemons?

To treat it, Jerry prepares an antifungal spray mix of copper hydroxide and thoroughly sprays both sides of the leaves and the bark. This has to be repeated as new leaves and lowers appear, as the airborne fungal spores will attack them too.

Are limes bad if they have brown spots?

Avoid limes with bruised or mushy parts as well as ones that are turning brown or have brown spots. Once you get home with limes, it’s time to decide how do you store them. … The tight seal keeps the moisture in the limes, so they last even longer without drying out. The same trick works for lemons.