Dr. Matteo Garbelotto, Forest Pathologist and Mycologist, UC Berkeley
October 20, 2007:
The assumption (in Dr.
Cindy Russell's email ) is that massive spraying will occur, which is not
the case. Treatments are focused on individual trees and the bark
applications are not broadcasted but basically carefully applied on
Fueling a car is a lot more dangerous than an appropriate application of
Pentrabark from an environmental perspective. Because the product sticks on
the target surface, it is extremely difficult for it to get into the
The email I was sent takes the treatments out of context, however we will
dedicate an equal amount of time to injections that do not require
I hope this helps.
First read Dr. Cindy
Russell's letter again..... she might be like someone you know in your area,
that cares about you, your friends and YOUR NEIGHBORHOOD.
Agri-Fos and Pertra-Bark are listed as pesticides and
carry the CAUTION statement on the respective labels.
My personal observation is just this; The Intent of
Dr. Russell's letter is to alert her friends and neighbors regarding the
potential risk hazards and potential toxicity of Pentra-Bark; using
pesticides and just as important to take all the necessary precautions when
making the applications to protect oneself and the environment. Typically in
the fall and spring, spraying the trunk applications gets into full swing
throughout their neighborhood. I would interpret her statement regarding
massive spraying, just as there are a lot of people, homeowners and
commercial applicators in the neighborhood, spraying a lot of individual
trees trunks and not spraying the surroundings of every home or some type of
aerial spraying covering the entire neighborhood. It was a responsible
warning and let face it, it is human nature to take short cuts and rightly
so, ignore to read all the label caution statements or heed to take proper
steps to protect ourselves.
Once the product is applied to the trees; it then
becomes part of the environment and all those trees are part of the habitat
of small animals; squirrels, mice, birds, frogs, lizards, bees, spiders,
other beneficial insects and microorganisms within those small ecosystem of
every back yard. Pesticides which are sprayed can become airborne and
eventually end up in soil or water and can percolate through the soil into
the groundwater, a major source of our drinking water. The degradation
process of pesticides, can sometimes produce more toxic products.
And Dr. Garbelotto's analogy of the gas fill up...
well .. that statement tells me that he is very much aware of the Pentra-Bark
potential toxicity.... so lets change the subject, brush it off and avoid
any scientific explanation, compare oranges to apples and what to heck, lets
go for a little ride; all those gas fumes slowly exposes the atmosphere with
other pollutants, we so commonly know about, but usually ignore..
There is some good news here, Dr. Matteo Garbelotto
is going to dedicate more time to illustrate the injection procedures that
does not require the inclusion of Pentra-Bark. Now, that is a good
The contents of Dr. Russell's letter is to alert
the reader and bring to their attentions, information about the active
ingredient in this products, the potential risks and use of any pesticide,
which are well documented and can be found by any search engine on the web.
Dr. Russell makes verifiable references as her source material and all these
references ready available and verified on the web, as it is public
information and well researched and documented by independent research
With regards to Sudden Oak Death articles
describing treatment protocols; the most often mention of ecological
risk assessment or product safety; Potassium Phosphite is the
one product most often described excluding any mention of Pentra-Bark, that
which is applied with Potassium Phosphite. Is there a justifiable
reason for this deliberate exclusion !
How safe are phosphites?
potential for exposure exists to nontarget insects, fish, and other wildlife
with foliar spray applications. However, test results indicate that the
compound is practically nontoxic to birds and freshwater fish, and, at most,
slightly toxic to aquatic invertebrates. Low toxicity, the proposed rate of
application, and mitigating label language present minimal to nonexistent
risk to wildlife.
" Can We Say The Same Thing For Pentra-Bark .......
and what about all those 'inert" ingredients?"
Of all the articles I
have read in the last year and a half on Sudden Oak Death, I came across
this one very obscure caution statement:
Caution: Potassium Phosphite is relatively benign, but the Pentra-Bark
compound it is typically mixed with, can irritate the lungs and the skin as
well as cause nausea and head aches. Avoid "over spray" and heed the
Manufacturer's Instructions on handling the product and wearing protective
Lets face it: Pesticides should always be
treated with CAUTION as indicated on the Manufacturer's Label
PESTICIDE FACTS and much much more.
Alternatives to Toxins in the Environment) P.O. Box 25188, Halifax,
NS.Canada. Pesticide Facts -
Network of North America -
thought: Chemical companies produce pesticides and the
bi-products are hazardous waste. One would believe that t
hazardous by-products should be properly disposed of in a hazardous waste
dump. Your Environment, Your Home and Surroundings are just that hazardous
waste dump. Hazardous waste is legally recycled back into the pesticides and
This is not something you want to put on your garden, or around your
home, yet that is where pesticide manufacturers intend to put it, It has got
to be dumped somewhere and it is with sanctions and the blessing of state
and federal environmental agencies. These finding are documented and
supported by the US. Federal Government, private agencies, and other
NOW LET'S SEE
BILL STRINGFELLOW'S PERSPECTIVE: Pentra-Bark - Toxicity Go
To Page 2
I must say I got a much different prespective from his e mail than I would
have gotten from a direct personal interview. I could only imagine that the
conversation would be very, very loud !
There is a lot of information available on the web
regarding PESTICIDES, use your search engine or visit our