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Hello Urban Forestry
Friends,
Here's what's happening in
urban and community forestry:
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New disease
threatens citrus trees:
Huanglongbing Disease
A new bug from Florida is
a risk to Californian citrus trees.
It showed up for the first time in Southern California in January of
this year and now we need to be on the lookout state-wide.
The insect responsible is the Asian citrus psyllid (ACP) with active
bacterium. A toxin may be released in saliva transfer process
when the bug sucks on sap.
The prognosis:
Infected trees will all stop producing fruit within five years of
being infected and will die early.
Signs
include:
- Small, yellow-orange,
almond-shaped eggs, which are laid at the tips of shoots or
among as-yet-unfolded leaves
- Leaves with yellow
blotches with the yellowing crosses leaf veins
- Asymmetrically
developed fruit- one side smaller than the other
- Fruit that ripens
poorly; remains greenish; not juicy, and what little juice it
has tastes bitter
If you think you have an infected tree, call the
CDFA Exotic Pest Hotline, (800) 491-1899. A county official will then
come to collect the specimen and inspect the tree.
Click
here for more details on the disease including photos, species at
risk and what you can do.
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Urban Forests & Climate
Change
In the Wake of Hurricane Sandy, there was a lot of news about damage
that trees caused, but we should also consider that urban forests can
provide much benefits to the community in terms of mitigating the
effects of climate change impacts and especially in storm management—
Trees help by:
- Improving water
quality by minimizing erosion;
- Slowing the flow of
precipitation;
- Minimizing flooding
during heavy rain events;
- Cleaning polluted
water;
- Click
here to read more.
Plus, such events remind us of the importance
proper tree maintenance can play. Click here
to read an article on how tree pruning may have helped mitigate some
damage from destructive Superstorm Sandy
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How does nature make you feel?
Probably a bit
Bi-oh-feel-ee-ya!
You know how you just feel good when you’re out in nature?
Well, there is an actual term for this feeling:
Biophilia
(pronounced Bi-oh-feel-ee-ya).
And its not just a funny word –it means love of living
cycles, or, nature.
If fact the “biophilia
hypothesis” (introduced in the 80's by respected scientist E.O
Wilson) suggests that there is an innate affiliation of human
beings to other living organisms, both flora and fauna, and perhaps
even an innate bond with nature more generally.
People want and
need nature.
That’s why our work as urban forestry professionals is so important
in creating and maintaining spaces where people can get away from
technology and spend more time in natural places - urban parks,
greenways, farms, river trails.
Click
here for a three part series on Biophilia
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Call out for Tree
& Signage Imagery
Do you have a great photo of trees and business signage co-existing
and doing a good job? Or a before and after where the tree was
causing a problem and now it works?
We would love to include it in an upcoming blog for the Invest From
the Ground Up campaign. We will of course provide proper photo
attribution.
Please email it to InvestInTrees@caufc.org
We'd really appreciate it!
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Thanks for all you do in
support of urban forests!
Sonali Shah
Communications and Outreach Manager
California Urban Forest Council
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