Thrips
Thrips are very small, slender insects that feed by damaging plant cells and sucking out their contents.
They can be difficult to see without looking closely.
Signs of Thrips
Look for silvery or pale patches on leaves, distorted new growth, tiny dark marks, damaged flowers, or small slender insects moving across leaves.
What to Do
Isolate affected plants and remove heavily damaged foliage where appropriate.
Persistent infestations may require an insecticide suitable for controlling thrips.
Because thrips can reproduce quickly, continue checking the tree after treatment.