Any idea what these spots might be & how I can eradicate them?

 

@Grafting Ken

 

@drtreelove

could be a fungus, you 'll need spray from the gardening shop.

I'm pretty sure it's a fungus.

On 6/19/2020 at 8:30 AM, faraday said:

Any idea what these spots might be & how I can eradicate them?

 

 

Very good photos, faraday.

 

If you have a Thai partner, I would suggest placing them in a sealed plastic bag and sending  some of the leaves  to the botany department of a university in Thailand.     You could, of course,  call them first to ask if they would take a look at what you'd like to send.

 

Yes you could just spray for the unknown but this could  do more damage than benefit.

 

Good luck.

11 hours ago, cooked said:

I'm pretty sure it's a fungus.

Not.  Appears to be edema.

 

https://www.gardeningknowhow.com/plant-problems/environmental/treating-edema-in-plants.htm

4 minutes ago, drtreelove said:

Not.  Appears to be edema.

 

https://www.gardeningknowhow.com/plant-problems/environmental/treating-edema-in-plants.htm

The leaves shown appear to be chlorotic (yellowed), indicating nutrient deficiencies and/or water uptake issues. (Always show photos of entire tree and site is more informative for assessment, and describe soil and water conditions).

 

I would say work on soil fertility plant nutrition, and water management.  This is the organic subforum, Disregard irresponsible suggestions to guess at fungal disease and rush to buy chemical sprays.