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Posts Tagged: invasive pest

New pest of olive trees found in Riverside

An arborist reported an unusual pest found on an olive tree in Riverside CA late 2016. CDFA identified it as an Olive Bark Beetle (OBB) Phloeotribus scarabaeoides (http://blogs.cdfa.ca.gov/Section3162/?tag=olive-bark-beetle)

Currently, the pest status is Q (quarantined) but it is recommended to be changed to B.

The report states the OBB has been found at olive trees at grape vineyard as well as a residence and 3 nurseries, all in Riverside County.  Surveys of olive trees at nurseries in other counties have not found any OBB.

The beetle is very small (2mm) and brownish-gray so it is difficult to detect. See https://www.forestryimages.org/browse/subthumb.cfm?sub=4146 for photos. 

Current hosts are olive, Fraxinus spp., privet (Ligustrum sp.), lilac (Syringa), Phyllirea sp.

Damage is caused by larval feeding and then by adults on weakened stems and branches of causing decline and sometimes death 
Damage can also be caused by adults creating feeding incisions on small, healthy branches causing the tips to dry out and die, or by adults damaging axillary buds when trying to initiate small galleries or holes where they can hibernate.

http://www7.inra.fr/hyppz/IMAGES/7030440.jpg

Good information about its biology and life cycle can be found on http://www7.inra.fr/hyppz/RAVAGEUR/6phlsca.htm

 

 

Posted on Tuesday, March 7, 2017 at 5:14 PM
Tags: bark beetle (1), invasive pest (4), olive (1)

Protect California’s landscape this camping season, don’t move firewood!

image 22439

Memorial Day weekend, traditionally considered the beginning of California's camping season, is right around the corner. If you are preparing for an upcoming trip, keep in mind that you can help...

Posted on Wednesday, May 21, 2014 at 7:03 PM
  • webmaster: jggonzales@ucanr.edu(Jan Gonzales)

Protect California’s landscape this camping season, don’t move firewood!

Memorial Day weekend, traditionally considered the beginning of California's camping season, is right around the corner. If you are preparing for an upcoming trip, keep in mind that you can help protect California's forests by buying firewood from a local source near the campsite rather than bringing it with you. When people move wood from place to place, they may also be moving invasive insects and diseases that threaten California's landscape and wildland trees. The goldspotted oak borer,...
Posted on Wednesday, May 21, 2014 at 7:03 PM
  • Author: jggonzales@ucanr.edu(Jan Gonzales)

Protect California’s landscape this camping season, don’t move firewood!

Memorial Day weekend, traditionally considered the beginning of California's camping season, is right around the corner. If you are preparing for an upcoming trip, keep in mind that you can help protect California's forests by buying firewood from a local source near the campsite rather than bringing it with you.  

When people move wood from place to place, they may also be moving invasive insects and diseases that threaten California's landscape and wildland trees. The goldspotted oak borer, which is devastating native oaks in San Diego, was likely brought there from Arizona in firewood. The polyphagous shothole borer, walnut twig beetle and thousand cankers disease, and the pathogen causing sudden oak disease, all continue to spread to new areas on infested wood chips, plant debris, or wood moved for woodworking or firewood.

Over the past year, the California Firewood Task Force has asked the public to "buy it where you burn it"—that is, don't bring wood from home when you camp, do use wood from local sources, and leave leftover wood at the campsite for the next camper. Even if wood does not appear to have borer holes or other evidence of pests, don't assume that the wood is pest free. Be on the safe side and don't move it.

The California Forest Pest Council established the Task Force in 2011 to educate Californians about what they can do to prevent movement of invasive pests in wood. The Task Force developed a Web site, put up billboards across California, sponsored children's activities at parks and fairs, encouraged campgrounds to sell only local firewood, gave presentations across the state, and developed best management practices, posters, and other information to engage the public.

For more information visit www.firewood.ca.gov/.

Posted on Wednesday, May 21, 2014 at 11:03 AM
 
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