Lemon Tree Fruit
My lemon tree has plenty of fruit and when they start to ripen they get little black spots over the skin. It doesn't penetrate inside but makes them look unsightly to use. Anyone know how to treat this. it has only started to happen in the last year. Tree is 20 years old.
Certified GKH Gardening Expert
This could be the start of a fungal infection. I would advise using wettable sulfur and dolomitic lime around the area. This should take care of the infection.