How To Eliminate Aphids From Our Willow Trees

Question

They are so bad that we sometimes cannot sit outside near these giant trees because of amount of sap or honeydew. Our car windows and doors are stuck closed! Help! If we do buy lady bugs how do you disperse them?

Answer 1

If the trees are full of aphids, the ladybugs would not be able to clear them out very quickly. These articles should help:

https://www.gardeningknowhow.com/plant-problems/pests/insects/aphids-tree-disease.htm

https://www.gardeningknowhow.com/garden-how-to/beneficial/purchasing-beneficial-insects-for-garden.htm