Press "Enter" to skip to content

A biopesticide, made in Africa, for the world | Mojisola Ojebode | TEDxJohannesburgSalon


told me that she felt very unfulfilled
for not taking up a choice career as a
secretary because my father didn’t
wanted to I decided I was going to make
my own choices and create my own path so
unlike other kids who depended on their
parents and advice as for what to study
in the university I thought I was going
to do something that would be
comfortable for me and so the search
began I never want to be on call at
night so becoming a medical doctor was
out of it neither do I want to have to
take you of animals my first choice was
pharmacy pharmacy because growing up I
used to wonder how each hawk-like
material could make people well but when
I couldn’t get into study pharmacy I
figured that the next thing would be
biochemistry because back in high school
I enjoyed that combo biology in
chemistry I was like yeah biochemistry
and I put in for it towards the end of
my final year I began to consider
community service and so I organized
training programs for undergraduate in
skill acquisition of course I had
several skills from baking to knitting
to soar into him because I was all over
the place so we publicized it and people
began to enroll one beautiful Saturday
morning I got this call from a
well-respected woman in my university
who is although a lecturer in our
different departments she said she
wanted me to train her on cardigan
making and I was really excited and
Hornet so not long after she parked the
car right in front of my oyster walked
into my small room inside on my bed
it felt super exciting so at the end of
the training she looked at me and said
so what do you want to do with
biochemistry after you graduate and I
was completely lost
I’d never given it at all so I
I haven’t figured it out yet and she was
like okay so why don’t you think about
doing something in language agriculture
you know was a agriculture had ruled
that out a long time ago I quickly
remembered our back then in high school
we had this cool farm and we would go
very L in the morning to do the wedding
and weeding out the vegetables even in
the afternoon we had to peep through the
classroom window to be sure that there
was nobody still in the vegetable I
don’t want to go through all so she
smiled and looked at me more closely in
was like you see I’m a microbiologist
but I also help women farmers get rid of
mycotoxins in their products you can
give it a second thoughts and I did just
that so what could I possibly do with
biochemistry and then I thought about
developing alternatives to the currently
used pesticides this is so much needed
because in developing countries
including Nigeria where I come from
farmers are mostly uneducated in rural
areas and so they find it very difficult
to follow the instructions of pesticide
labels especially when there’s an
outbreak of a disease or a pest
they end up spraying indiscriminately
and of course this has implications for
both else and the environment so I
decided to do some more research and I
found out that about 40% of copies is
lost as a result of insect pest attack
and storage farmers lose they lose a
huge portion of their profit as a result
so I decided to design a pet project in
this line and so on one occasion working
with my mentor a professor of botany I
saw that in that community
you know people planted hubs and shrubs
around their homes I initially thought
they were just for decorative purposes
until I asked and and I said oh this one
kills malaria this one prevents measles
this takes care of leprosy so I pointed
to the lemon grass and they said oh that
one repels reptiles
makes on the legs I thought really
fascinated Wow if it could actually
repel reptiles it might be able to get
rid of smaller insects like weevils
so I decided to do some work on the
plants in the laboratory when I put in
for my moustache it became a lot clearer
and I found a team of four and we began
to see what we could do with the plants
we tried a number of things including
blending the leaves and then treating
infested beans with it of course that
did not work because instead of the
rivers dying they were actually healthy
and stronger of course it was a
medicinal plant what did we expect okay
so I thought let’s try something else
what about extracting the bioactive
components of the plants and that was
what we did we had the option of using
solvents like it’s a known and exam
which we did the result was good when I
wasn’t so comfortable with the idea of
solvents because it means that the
solvent had some impact on the results
and not just the plant so I thought of
going for distillation process using
water and we did that and obtained the
distillate so we treated infested beans
with different doses of the distillate
and we obtained about a hundred percent
weevil mortality in just one hour of
exposure that was fantastic for us so we
thought about it if it could actually
get rid of the weavers how about the
eggs and so we designed another group
where we didn’t have the weavers but
beings with the eggs on them
so with treated that’s with the
distillate and then incubated for some
days after which we checked and alas the
eggs didn’t add into others so that
means that our distillate had 100% to
weevil and egg mortality within one hour
of exposure so that felt really exciting
for us and then I thought about it how
about strengthening the effect of the
distillate so I thought of incorporating
some other botanicals like a high soap
lime and orange peels you know through
the same process and that really
what so we needed a second opinion and
then we send samples to a public analyst
and to the stored product research
institutes they give us fantastic
resource and they were really excited oh
this works so well we’ve not been having
something like this with not hard
crumples in the past and this is really
good so because we were excited by the
results we decided to do large-scale
testings you know get it across to the
farmers who need them
on one occasion working with the farmers
we located a particular community in
like a local government area where we
have beans tomato rice farmers of course
they had problem with weavers and then
we got the incent hello we scientists we
have a product were like for you to test
give us your feedback you might even
want to purchase from us later on and
you know they were really excited to
associate with us so they brought out
their infested beans and then sprayed
the formulated product for about five
minutes covered it and then allowed it
to air dry for another five minutes they
were really amazed by the results and in
fact it had a sweet lemony smell unlike
the regular pesticides so I realized
that this solution of course is otitis
and alternatives that could work
anywhere in the world when I saw the
smile on their faces and how excited
they were as a solution I realized that
in the end what actually suits me is
what benefits orders with biopesticides
the currently over 1.2 million organic
farmers that we have worldwide can worry
less about insect attacks and even do
away completely with pesticides of
course more organic farmers will be able
to come on board thank you [Applause]
Please follow and like us: