Q.Black Bugs On Basil Stems
Larger than thrips. What are they and how do I treat them?

Certified GKH Gardening Expert
This will be scale! Here are some articles that will help:
https://www.gardeningknowhow.com/plant-problems/pests/insects/control-plant-scale.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/what-is-armored-scale.htm
https://www.gardeningknowhow.com/special/organic/what-are-organic-pesticides.htm
https://www.gardeningknowhow.com/edible/herbs/basil/how-to-grow-basil-plants.htm