White particles on trees - Ask Extension
What are the white particles I am getting on my trees in the pictures attached.
Knowledgebase
White particles on trees #857124
Asked January 08, 2024, 9:36 AM EST
What are the white particles I am getting on my trees in the pictures attached.
Ottawa County Michigan
Expert Response
Hello,
From this single image, I identified this tree as a Eastern red cedar. Based on what I see in your single image this appears to be a fungus or scale problem. This was based on what I read in the below links.
Insects, Diseases, and Other Plant Problems of an Eastern Red Cedar: This tree is susceptible to twig blight and scale. Bagworms are also a problem. Mites may occur. It shares with apple trees the susceptibility to a rust fungus called Gymnosporangium juniperi-virginianae. This fungus causes "cedar apples" on red cedar twigs and dark leaf spots on apple leaves. Check out this link:
https://plants.ces.ncsu.edu/plants/juniperus-virginiana/
The Clemson Cooperative Extension Home and Garden Information Center has a factsheet on common juniper diseases and insect pests. Check out this link:
https://hgic.clemson.edu/factsheet/juniper-diseases-insect-pests/
You should get a confirmed diagnosis from the MSU Diagnostic Plant & Pest Lab - Please email your digital image prior to bringing or sending physical samples. It can be sent to <personal data hidden>.
MAKE SURE IN THAT E-MAIL YOU INCLUDE YOUR NAME, ADDRESS, AND PHONE NUMBER!!
Be prepared. The lab may ask for more images - THE LAB WILL LET YOU KNOW IF A SAMPLE NEEDS TO BE SENT - There is a $20-25 dollar fee (if they need a sample sent).
Lab email: <personal data hidden>
Lab phone:<personal data hidden>
Hours of operation: Monday through Friday, from 8:00 AM to 5:00 PM.
PLEASE READ BELOW ON PREPARING YOUR SAMPLE (if the lab needs a sample)
From the lab: Please do not ship samples on Fridays. They thank you for your patience and understanding.
Every sample must be accompanied by a completed submission form. Please place the form in a separate resealable bag to prevent it from getting damp or soiled. The form is at this link: https://www.canr.msu.edu/pestid/uploads/files/General_Sample_Submission_Form_May2022.pdf.
Complete details of submitting a sample are at this link: https://www.canr.msu.edu/pestid/submit-samples/
I hope this helps!
From this single image, I identified this tree as a Eastern red cedar. Based on what I see in your single image this appears to be a fungus or scale problem. This was based on what I read in the below links.
Insects, Diseases, and Other Plant Problems of an Eastern Red Cedar: This tree is susceptible to twig blight and scale. Bagworms are also a problem. Mites may occur. It shares with apple trees the susceptibility to a rust fungus called Gymnosporangium juniperi-virginianae. This fungus causes "cedar apples" on red cedar twigs and dark leaf spots on apple leaves. Check out this link:
https://plants.ces.ncsu.edu/plants/juniperus-virginiana/
The Clemson Cooperative Extension Home and Garden Information Center has a factsheet on common juniper diseases and insect pests. Check out this link:
https://hgic.clemson.edu/factsheet/juniper-diseases-insect-pests/
You should get a confirmed diagnosis from the MSU Diagnostic Plant & Pest Lab - Please email your digital image prior to bringing or sending physical samples. It can be sent to <personal data hidden>.
MAKE SURE IN THAT E-MAIL YOU INCLUDE YOUR NAME, ADDRESS, AND PHONE NUMBER!!
Be prepared. The lab may ask for more images - THE LAB WILL LET YOU KNOW IF A SAMPLE NEEDS TO BE SENT - There is a $20-25 dollar fee (if they need a sample sent).
Lab email: <personal data hidden>
Lab phone:<personal data hidden>
Hours of operation: Monday through Friday, from 8:00 AM to 5:00 PM.
PLEASE READ BELOW ON PREPARING YOUR SAMPLE (if the lab needs a sample)
From the lab: Please do not ship samples on Fridays. They thank you for your patience and understanding.
Every sample must be accompanied by a completed submission form. Please place the form in a separate resealable bag to prevent it from getting damp or soiled. The form is at this link: https://www.canr.msu.edu/pestid/uploads/files/General_Sample_Submission_Form_May2022.pdf.
Complete details of submitting a sample are at this link: https://www.canr.msu.edu/pestid/submit-samples/
I hope this helps!
