How to get rid of ants under rosemary bush in the ground?

Question

I have a large rosemary bush planted in the ground. The past few months I have noticed it is not as full and green as it has always been; some sections are turning brown and dying off. I noticed today there is an ant hill in the roots. Are the ants the cause of my rosemary plant’s declining?

Answer 1

Normally ants are after honeydew, which is secreted by pests such as aphids. Here is more information and how to control them, as well as diseases of rosemary.

https://www.gardeningknowhow.com/plant-problems/pests/insects/controlling-aphids-and-ants.htm

https://plantvillage.psu.edu/topics/rosemary/infos