![Leaves of a river red gum eucalyptus tree covered with redgum lerp psyllids. The white growths are the “lerp” produced by the immature (nymph) stage of the insect. [Credit: Jack Kelly Clark]](https://ucanr.edu/blogs/UCIPMurbanpests/blogfiles/92910small.jpg)
If you have eucalyptus trees, you might have noticed white, crusty growth on the leaves. Or maybe you saw a sticky, blackened mess of fallen leaves under a eucalyptus tree. These are signs of the redgum lerp psyllid, one of the most common psyllid pests that damages eucalyptus trees in California.
The adult psyllid is very small and as nymphs, they are concealed under a waxy cap, or lerp. As they feed, they excrete honeydew which can lead to the growth of black sooty mold, the source of those sticky leaves under the tree.
Although under biological control in coastal areas, this pest is still a problem under some growing conditions and on specific Eucalyptus species. Cultural practices to manage...
- Author: Karey Windbiel-Rojas
If you are battling with ground squirrels or tree squirrels around your home or property, join us on Thursday, May 19 at noon for UC IPM's one-hour seminar on Squirrels! Dr. Niamh Quinn, UC ANR's Human-Wildlife Interaction Advisor in Orange, Los Angeles, and San Diego counties, will share her insights on squirrel identification, biology, and management. There is still time to register and as always, our monthly webinars are free and open to the public!
https://ucanr.edu/sites/ucipm-community-webinars/
![Spotted lanternfly is an invasive insect not yet found in California. [Credit: Lawrence Barringer, Pennsylvania Department of
Agriculture, Bugwood.org]](https://ucanr.edu/blogs/UCIPMurbanpests/blogfiles/90148small.png)
Due to unforeseen circumstances, the webinar scheduled for April 21 has been canceled and will be rescheduled for another date. We apologize for the inconvenience.
---
What are you doing the third Thursday of each month at noon? Joining UC IPM for our monthly webinar, we hope!
This Thursday, come and learn about invasive species in California and what you can do to combat them! In Part 2 of this topic, Karey Windbiel-Rojas from the UC Statewide IPM Program will continue sharing information on new pests of concern or pests we are trying to keep out of California.
Can't make it? That's ok-- all the UC IPM webinars are recorded and later posted on UC IPM's YouTube channel....
- Author: Belinda J. Messenger-Sikes
(Credit: Jack Kelly Clark)
All mistletoes infest and grow as parasites on trees and large shrubs. In some cases, the host plant can be severely damaged. But recent studies have shown that broadleaf mistletoes can shelter and feed wildlife, including birds and small mammals. So, mistletoes are both parasitic plants and bird food!
Because mistletoes can damage trees, you may decide to do something about mistletoes infesting your trees. The first step is to find out whether you're dealing with broadleaf or dwarf mistletoe. Mistletoes differ in their life cycles, the damage they cause and management methods. UC Cooperative Extension Advisors Igor Lacan (San Mateo and San Francisco Counties), Steven Swain (Marin County) and Ed Perry (Stanislaus County,...
UC IPM is excited to continue with our monthly urban and community IPM webinars. Webinars cover pest identification, management, and pesticide use around homes and gardens for California residents.
Spring webinar registration is now open to the public. All webinars are one hour, held on the third Thursday of the month at 12:00pm noon. The webinars are free, but advance registration is required. Please see below for a list of upcoming webinars and check out the webinar website for more information.
Upcoming Webinars
- February 17, 2022: Bed Bug Prevention.
