I have noticed these bugs on new and tender branches of my ivy.
What are they, and how can I get rid of them? Neem oil doesn’t seem to be effective.
These are aphids a soft bodied insect that comes in a variety of colors and suck plant juices. They multiply quickly and some can fly. I recommend cutting back the plant and spraying with soap and water. This question is quite similar
For that plant and all aphid problems you can control by spraying dish soap and water at 5 ml/liter. Spray and leave on for a few minutes then rinse with water.
Repeat a total of three times to get the eggs as they hatch.