Q.Citrus Lemon plants
I have a citrus lemon plant in my conservatory. It has developed sticky deposits on the leaves, and it appears to be on the older leaves. Some buds have just appeared on a new shoot. How can I treat the plant to rid the sticky deposit?

The sticky substance in likely do to an infestation.
Treat the Lemon Tree with Neem Oil.
Neem Oil is organic and safe for people, pets and bees.
Here are some links with more information.
https://www.gardeningknowhow.com/garden-how-to/info/what-is-honeydew.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm