What Is Attacking My Agapanthus?

Question

I have about 8 agapanthus that have thrived for many years but this year they are not flowering and are covered in a white powder. I think it may be powdery mildew but I’m not sure. To only remove the infected parts means removing everything as they are riddled with it. Any advice would be appreciated. Thank you

• 
• 

Answer 1

I suspect it is an insect such as aphids or mealybugs. Treat the plants with Neem oil to combat either of those. It also acts as a fungicide and will help with powdery mildew, if that is going on, too. You can pull off the dead leaves, that will get rid of some of them, too.

Here is more:

https://www.gardeningknowhow.com/plant-problems/pests/insects/outdoor-mealybug-control.htm

https://www.gardeningknowhow.com/top-of-the-crop/top-5-pests-attack-garden-plants

https://www.gardeningknowhow.com/ornamental/bulbs/agapanthus/diseases-agapanthus-plants.htm

https://www.gardeningknowhow.com/ornamental/bulbs/agapanthus/agapanthus-plant-care.htm

https://hort.extension.wisc.edu/articles/agapanthus/