What are the small black bugs on my nasturtiums?


A small black bug has taken over my nasturtiums! I’ve never seen an infestation likes this before on any of my plants. What are they and how do I manage them? 

aphids on nasturtiums
Photo used with permission from client.


Caragh B. Fitzgerald, Associate Extension Professor

Those insects are aphids.  Often aphids are not very problematic, but sometimes they can be severe enough to affect the plant.  A strong stream of water can dislodge them and is a good first line of management.  Insecticidal soap can also be very effective.  More details can be found in the UMaine Extension Pest Management Fact Sheet #5039, Sucking Insects That Affect Vegetable Plants.