[compost_tea] Re: Rust Control

From: Steve Diver <steved_at_ncat.org>
Date: Tue, 04 Jan 2005 17:14:12 -0000

There is a lot more to rust control than
simplistic emails can convey.  Here are a
few points.

There is an ad-hoc network of USDA, researchers,
industry, farmers, and NGO's working on
organic control of soybean rust.

Field research plots are done in South Africa
and South America. Our "winter" season is their
"summer" season. 

Results from screening of conventional fungicides
to compare efficacy are readily available.

There are no results from organic disease
control trials, as yet, because they are
just now getting organized.  

The OMRI List is a key source to identify
organic disease control products and registrants. 

The only research taking place in the U.S. is
in security-control labs and greenhouses. 

Soybean rust is considered a homeland security threat.

Germplasm resistance is nil.

Cultural practices have little effect.

Rust descends in clouds of spores across
the whole countryside.

Compost teas and related foliar microbials
and foliar biostimulants are among the tools
that you hope can provide disease suppression
for soybean rust, but nobody has any data to
suggest what level of control you can expect.

The National Agricultural Library just
published this resource guide.  If you notice,
it contains advanced search strategies that
are unique.

Soybean Rust: A National Agricultural Library Resource Guide
http://www.nal.usda.gov/ref/soyrust.html

ATTRA will produce a guide to understand
organic control options, available soon.

Regards,

Steve Diver
http://www.attra.ncat.org






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Received on Tue Jan 04 2005 - 22:20:27 EST

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