[Digestion] Pest repellent capability of biogas slurry - information request

Anand Karve adkarve at gmail.com
Wed Dec 24 08:35:59 MST 2014

Dear List,
in continuation with my communication from yesterday I wish to add
that all animals represent live biogas plants and their dung the
slurry . It is a common practice in rural India and also in some parts
of Africa to regularly use cattle dung for plastering the walls and
floors of houses. One would expect such a plaster to attract flies but
actually it does not. This is also most probably due to the fact that
the flies do not find cattle dung appetizing.
Yours A.D.Karve
Dr. A.D. Karve

Chairman, Samuchit Enviro Tech Pvt Ltd (www.samuchit.com)

Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)

On Tue, Dec 23, 2014 at 4:00 AM, Hoysall Chanakya
<chanakya at astra.iisc.ernet.in> wrote:
> Dear Digestion list members
> Merry Christmas and a Happy new year
> I will attempt to examine the pest repellent properties of digester liquid
> from an anaerobic digester and I request list members if they could share
> any such experience- documented, published or simply visually
> authenticated on this subject.
> I am inspired by the fact that between 1992 and 2006 organic farmers of
> the Low external inputs and sustainable agriculture (LEISA) network in
> South India fermented leaves of local weeds and sprayed the filtered
> digestate (25d old) to obtain pest repellent action for periods between
> 3-7d for many sucking pests (aphids and jassids), red hairy caterpillar
> (groundnut), pink boll worm (cotton) and many less described pests of
> paddy, green gram and a few vegetable crops.
> Please share with me any such information if you know of any,.  I am
> attempting to document and experiment the same.  The irony has been that
> for long (over 40 years) we recommended that digestion of cattle dung
> because it removes the property of attraction to flies and only very few
> workers have attempted to determine if it actually repelled insects (and
> pests).
> With best wishes
> And thanking you in advance
> Chanakya
> chanakya at astra.iisc.ernet.in
> hoysull at gmail.com
> --
> Center for Sustainable Technologies
> Assoc. Faculty. Center for Contemporary Studies
> Center for Infrastructure, Sustainable Transport and  Urban Planning
> (CiSTUP),
> Indian Institute of Science, Bangalore
> --
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