White lumpy material on Thornless Hawthorn tree - Ask Extension
What is the cause and treatment for this? See three picturesThe leaves of the tree also weep a sappy liquid that covers the ground beneath the tree's ...
Knowledgebase
White lumpy material on Thornless Hawthorn tree #576834
Asked July 04, 2019, 1:01 PM EDT
What is the cause and treatment for this? See three pictures
The leaves of the tree also weep a sappy liquid that covers the ground beneath the tree's canopy. Overall the tree looks healthy. It is probably 15-20 years old.
Douglas County Colorado
Expert Response
These appear to be Hawthorne mealybugs. See the following links:
https://planttalk.colostate.edu/topics/insects-diseases/1457-hawthorn-mealybug/ The honeydew they secrete would be what looks like sap on the leaves and under the tree.
https://planttalk.colostate.edu/topics/insects-diseases/1457-hawthorn-mealybug/ The honeydew they secrete would be what looks like sap on the leaves and under the tree.
Great information. This looks to be exactly the issue.
Would a systemic (drawn up through the roots) kill the mealy bugs. I’ve used a systematic drench product on my Spruce trees for borers and it worked great. Fertilome brand.
Thanks again.
Would a systemic (drawn up through the roots) kill the mealy bugs. I’ve used a systematic drench product on my Spruce trees for borers and it worked great. Fertilome brand.
Thanks again.
http://ipm.ucanr.edu/PMG/PESTNOTES/pn74174.html
Found this link that gives you further information about the mealy bug and possible
ways to combat them with insecticides.
Hope this will help you solve your issue.
regards,
Linda
Found this link that gives you further information about the mealy bug and possible
ways to combat them with insecticides.
Hope this will help you solve your issue.
regards,
Linda
