Question
I live in Southern CA, in the Coachella Valley lower desert. My meyer lemon tree was VERY HAPPY and prolific for years. I had it pruned a few months ago for the bottom branches only, right around blossom time. This is the only change to its environment.

The leaves now have brown spots on them, are curling inward and deformed. (sure wish I could upload a pic/pdf). On the newly deformed leaves that haven't dried up and prematurely fallen off, there are bizarre spores like a micro-minature dandelion when it goes to seed and you make a wish on it.

I hope this is enough information and thank you for this site!

Answer
Hi Chris,   I use a product called Atomic Grow which is an organic product made from food.  It raises the sugar level in the plant called raising the brix.  The more brix bugs do not want to eat sweet leaves so the go somewhere else.  It kills nothing.  Atomic Grow is sprayed on the leaves once a week for 3 weeks sick plants 6 weeks then once a month there after to keep the plant healthy.  I is mixed 2 tablespoon per gallon and do not go bad.  I use it on all my plants. It is made from food.  Also check with your nurseries to see if they sell Keyplex for Citrus which is minor nutrients and organic.  You can mix the two together lowering the amount of the Keyplex for citrus to 2 tablespoons per gallon.  Plants are just like people if you feed them good food they prosper use poison the will eventually die.  kathy