![Fig. 1 (a) Dying and dead Diplacus aurantiacus (orange bush monkeyflower) with advanced above ground symptoms, typical of Phytophthora disease. The infected plant has chlorotic (yellowing and browning) foliage. [L. Sims]](https://ucanr.edu/blogs/UCIPMurbanpests/blogfiles/40702small.jpg)
[From the December 2016 issue of the UC IPM Green Bulletin]
A new plant pathogen in the genus Phytophthora (pronounced Fie-TOF-ther-uh) has recently been found in several California native plant nurseries and habitat restoration sites. The pathogen, Phytophthora tentaculata, poses a risk of disease in wildlands, gardens and landscapes that use susceptible California native and non-native plants. Once introduced in these areas, the pathogen can generate disease for years to come, potentially causing lasting environmental and economic...
![Retail nursery employee and customer. [C. Reynolds]](https://ucanr.edu/blogs/UCIPMurbanpests/blogfiles/40384small.jpg)
Attend one of two Northern California Retail Nursery and Garden Center IPM Workshops this January!
UC IPM is offering two hands-on, train-the-trainer workshops designed especially for retail nursery and garden center employees, managers, owners, and affiliates. Topics will include invasive pests, Asian citrus psyllid and huanglongbing disease, household pests, as well as how to serve your customers' IPM and pesticides needs. Participants will receive materials and resources to bring back and train others in your store and to help you better serve your customers' pest needs.
Tuesday, January 24, 2017
Oakland Center, CSU East Bay -- Oakland, CA
8:30 AM - 3:30 PM
...
![Adult, nymphs, and white wax of Asian citrus psyllids. [M. E. Rogers, University of Florida]](https://ucanr.edu/blogs/UCIPMurbanpests/blogfiles/39548small.jpg)
The following press release was distributed on October 17, 2016 by the California Department of Food and Agriculture.
Insect that carries disease deadly to citrus trees found in Placer County.
A portion of Placer County has been placed under quarantine for Asian citrus psyllid (ACP) following the detection of multiple life stages on citrus trees within the City of Lincoln.
The quarantine zone in Placer County measures 118 square miles, bordered on the north by Riosa Road; on the south by the Roseville City Limit; on the west by Brewer Road; and on the east by Fowler Road. The quarantine map for Placer County is available online at:
If you plan to camp this summer, remember to wait until you arrive at your destination before you purchase firewood. Why?
If you bring your own firewood to a campground, you could unknowingly spread invasive pests and diseases that can harm local trees. New infestations of tree-killing insects and diseases are often found in campgrounds and parks as a result of campers moving firewood.
Once you arrive at your destination, pests can emerge from the firewood and spread to the trees and forests where you camp. Invasive and hard-to-control pests kill several million native trees every year, causing environmental and economic problems.
Ways You Can Help
- Buy it where you burn it! Purchase firewood...
![Adult (top) and mature nymph of the brown marmorated stink bug. [S. Ausmus]](https://ucanr.edu/blogs/UCIPMurbanpests/blogfiles/34755small.jpg)
The brown marmorated stink bug (Halyomorpha halys) or BMSB is a new invasive pest of urban and suburban homes and landscapes in California.
A native of Asia, the brown marmorated stink bug immigrated into the United States in the 1990s but has only recently been reported in California. The bug prefers to feed on seeds and fruits, so is most damaging to fruit crops; however, it is a polyphagous feeder that may feed on fruit, leaves, or seeds of many ornamental plants as well.
Landscape managers may become most aware of this new pest in the fall when it aggregates in very large numbers on trees or within dwellings, often becoming a nuisance pest.
For more information about the brown marmorated stink bug, read the...
