May be Thrips
Thrips live on the undersides of leaves. Young thrips are oval, white and wingless. Adult thrips are winged insects, ranging from pale yellow to brown. These insects create holes in the leaves to access the plant's moisture and lay eggs in the holes. Thrips cause an angel's trumpet's leaves to turn shiny silver, interfering with photosynthesis and destroying the plant.
https://homeguides.sfgate.com/...
