Actually your tree looks quite healthy. The insects along the mid rib look to be scale. You can kill them with a horticulture oil spray, soapy water spray, or neem oil spray. The large spot is caused by birds picking on the fruit.

😅 Thanks! Any guess why the leaves are turning white?

I agree about scale. Did you gradually put your tree outside or just straight into direct sunlight? I would also advise against the spikes. Jobes granular works just fine and it's cheaper too. The spikes just don't seem to do as well.

I may be wrong, but I am slightly dubious that the green bumps along the leaf veins are scale. Do they come off very easily with a finger nail? If not I suspect oedema.

Thank you all.

@bonsai_citrus_and_indoor_gardening, I did just move the tree outside so instead of 2 hours of afternoon sun it's now getting about 6 hours of morning sun and midday heat. Does that shock the plant? Having done that a few days ago, should I just leave it be for now?

I think @floral_uk z.8/9 SW UK might be right about the non-scale. They don't wipe off easily, and there is none on the underside. I'll make sure to drain its saucer when I water and see if it improves.

floral_uk may be right about the oedema, looking at it again on my tablet it looks a little less like scale. As for putting the tree outside, just like you'll get a sunburn if you're indoors all winter and then go spend all day outside in 90 degrees, trees can get sunburned if you don't acclimate them to outside gradually. I suspect that may be some of the lightening you're seeing on your leaves. Once the damage is done, it's done, so now I'd just water as usual. If the plant is outdoors, I wouldn't place it on a saucer, I'd just let it freely drain over the ground. Maybe elevate it a bit so that it can drain more freely. Elevating the pot can also keep the populations of undesirables from the ground down a bit. I've dealt with sunburn even on my own trees this summer just with how intense the sun has been this year when it's been around. Not much you can do other than just let the tree grow.

oedema in citrus normally shows up on the back of a citrus leaf, not the front. Further the swelling spots of oedema are much larger, than the spots shown in Chirs's photo. Whatever, Chris has nothing to worry much about her tree. It looks healthy. As to the question Chris asked, the answer is Yes, Chris you are loving your tree to death.

If they don’t wipe off they’re not scale.

First thing, don't use fertilizer spikes. Dig out the old gunk, and switch to a liquid fertilizer and a slow release supplement such as Osmocote Plus.

Josh

I agree with Josh! I was thinking the same thing.

Photo 1, 2, 4 - this is from the sun.

Photos 3, 5 - other, describe what you did in more detail. What and when you sprayed?

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