My 10 year old Greengage Plum is covered with frass on the top side of leaves and the bottom sides are covered with young non-flying crawling insects ...
Knowledgebase
Insect infestation on Plum leaf #876338
Asked July 08, 2024, 1:39 PM EDT
My 10 year old Greengage Plum is covered with frass on the top side of leaves and the bottom sides are covered with young non-flying crawling insects and a few adult winged insects, pale green color. Ladybug beetles are numerous on the top sides of the leaves. I understand this is not particularly harmful to the tree but I'd like to know what the insect is.
Linn CountyOregon
Expert Response
Hi Don,
That's quite a picture you have. They are aphids. I found some microscopic pictures of them and they look just the same. A hard, forceful watering will get rid of most of them. They are prolific this year.
I sprayed my rose bush with water and the number of aphids turned the house wall gray there were so many. You can also use insecticidal soap without damaging the plant.
I am attaching the video with the microscopic images for your review. If you have further questions, please contact us again.
