[Stoves] Biochar Projects for Science Students

[Anand Karve]

Dear Crispin,
Azadirachtin, the insecticidal substance in neem oil is chemically not
stable and one finds that older oil samples have very little or no
azadirachtin. It is not an instant killer like the chemical insecticides but
acts as a juvenile hormone analogue on insects and stops their
development. It therefore works best as a prophylectic measure. When eggs
laid by a moth hatch into leaf eating caterpillars,  azadirachtin stops
their further development.
Yours
A.D.Karve

On Mon, Nov 29, 2010 at 8:45 PM, Crispin Pemberton-Pigott <
crispinpigott at gmail.com> wrote:

> Dear Jeff
>
> Did it have insect management marked on the bottle as one of its
> properties?
>
> >...Maybe it doesn't work on the bugs that I had or maybe the neem oil I
> bought had something wrong with it.
>
> I am wondering if it was the 'right sort'.
>
> Regards
> Crispin walking from the lab at -16 C
>
>
>
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-- 
***
Dr. A.D. Karve
President, Appropriate Rural Technology Institute (ARTI)

*Please change my email address in your records to: adkarve at gmail.com *
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