What is wrong with citrus plant

Brother Navdeep how are you,as per your image its seem like Powdery Mildew and Potassium Deficiency

Tufail Abbas

Not like Powdery Mildew infestation dear also have a look on Citrus Greening Disease dear Navdeep

I will suggest you the leaves are already damaged so do the pruning Spray coppor or bordeaux mixture on stem and wounds When new leaves start spray acetamiprid In flowering stage spray boron 20% After 2 days spray planofix And put old manure+12-08-36+50 gm zinc

For disease and pest attack visit our community plantix dear Navdeep and Fida Muhammadkhan 👍👍

Tufail Abbas ok sir thank u