[compost_tea] Re: Plant Defense Responce Pathways.

From: hi_yield1 <hi_yield1_at_yahoo.com>
Date: Sun, 23 Nov 2003 05:26:39 -0000

Ted,
 I don't know what those possible triggers are? I'm just wondering
are we inoculating or immunizing the plants when we spray them down
with CT? It seems everybody has their own witches brew. With widely
varying test numbers and field results? Even folks that stick to a
particular recipe say it's hard to duplicate results. Is it the seed
source of the humus-compost, is it the age, too new, too old (shelf
life), when it's processed is it exposed to extreme temperature
fluxes, dried out, UV deterioration, has all of the good stuff been
leached out due to heavy rainfall? OMG printed an article 06-14-1999
stating, "COMPOST SURVEY RAISES QUESTIONS ON COMPOST QUALITY." Woods
End Lab rated the compost from "good" to over aged having little
organic matter and microbial activity left. The product labels
compared to test results showed no apparent correlation between
quality and use listed on the label.
Has anyone grown anything in a closed system growth chamber to measure
the effects of photosynthetic activity on CT treated plants? Is the
kitchen sink approach working?
Is it a specific batercia or antigen missing that is causing varied
results? Are these somtimes missing links responsible for activating
the SAR response? There by increasing plant bio mass, yield and
disease resistance. Where is this kind of scientific research? The
actual brewing of compost tea is not rocket science! So why can't
consistant test results be gotten each and every time? I don't know!
 Take care Hi-yield1.

--- In compost_tea_at_yahoogroups.com, "Ted Peterson" <ted.peterson_at_t...>
wrote:
> Hi Yield1:
>
> I am curious about which plant pathogens you are referring to. I
have used AACT to suppress powdery mildew on grapes and areas where I
have foliar applied it show resistance (the sprayed plants do not get
certain fungal outbreaks usually associated with weather conditions)
in the limited time I have used it. I have not done an extensive
multi-year experiment and am involved with one now so I will see how
it works over a long period of time.
>
> The plant pathogens -- I assume you mean extracts used for medicine
-- would seem to be anti-fungals and bacterials in nature so they
would be incompatible with the growth of bacteria and fungi if applied
during or at the end of the brewing process.
>
> There may be a middle ground because correct brewing does create a
great deal of aerobic bacteria. Our numbers from SFI on an early
design mechanical brewer showed high bacterial counts but low fungal
counts. We have since refined the brewing process.
>
> So let's say that we up our bacterial caount 10 times to be
conservative. A plant extract added to this mix and applied
immediately (within an hour) might keep the extract active for what it
does and not kill off so many bacteria that it renders the tea
useless. I don't know if any tests have really been done on this
level.
>
> Compost made from certain primary plants might favor certain
bacteria if indeed, the plant has some kind of antibacterial agent
that is a byproduct of the plant. The bacteria that exist on that
plant would be immune from the agent and would be available for growth
in the brewing process. I don't know if these bacteria carry any
special property, other than resistance to the extract, that would
make them more or less favorable when used, in a foliar application,
to resist the spread of harmful bacteria and fungi. But they would be
alive in the tea and presumably enough would be alive when applied to
outcompete certain bacterial/fungal diseases. Outcompete the disease
and the disease has a far less chance to spread. Slowing the spread
or confining it to a small area that can then be treated
conventionally, saves the overall crop from massive applications of
chemicals and adds to the overall crop health. Eventually, it should
be possible to reduce antibacterial/fungal inputs to zero.
>
> Ted Peterson
> Earth-Wise/Spirit of the Earth
> ----- Original Message -----
> From: hi_yield1
> To: compost_tea_at_yahoogroups.com
> Sent: Thursday, November 20, 2003 9:59 PM
> Subject: [compost_tea] Plant Defense Responce Pathways.
>
>
> So just exactly how does some CT brews suppress plant pathogens?
It
> has been suggested many times in this forum that it is simply
numbers.
> The fungi and bacteria when sprayed on the leaves overwhelm and
out
> compete most plant pathogens. Or could it be a more specific mode
of
> action that is responsible? Or has something activated the
multiple
> defense signal transduction pathways? 1 bacterial resistance
pathway,
> 2 salicylic acid dependent pathway and 3 jasmonate/ethylene
dependent
> pathway? Causing an incompatible interaction, hypersensitive
responce?
> Have any real control studies been done? Has RNA been isolated and
> analyzed to determine expression levels of these pathways or
level of
> gene expression? That is the sort of data I would be glad to
embrace.
> Direct undeniable plant specific response to product being used.
Take
> care hi_yield.
>
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Received on Sun Nov 23 2003 - 01:18:22 EST

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