Japanese maple tree

Question

The plant started to have white spider-web-like material on the leaves. The underleave has the typical spiral shape that make me diagnose it as whitefly.
How do I treat it.

Answer 1

This article should tell you everything you need to know about controlling whiteflies:
https://www.gardeningknowhow.com/plant-problems/pests/insects/whitefly-control.htm