WEBVTT

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So the short-term
shutoff in response to PA

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is that it protects the insects
from over ingestion of them.

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Now, they're toxic,
and these insects

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are adapted to deal with them.

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But we thought that it could be
that they get too much of it,

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and too much of a good thing
can also be toxic to them.

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In fact, we've reared them
on diet with these PAs in,

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and it's not true.

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They can take any amount.

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So this is not an issue.

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But it does ensure
that the insects retain

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their normal food-mixing
habit, and that's

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needed to prevent over-ingestion
of all the other toxins.

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Now, even these PA plants--

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they have the
chemical they need,

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but they've got other stuff
in them too which is bad.

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So here's your problem.

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You've got to get
the PAs, but you

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don't want to eat too
much of that plant,

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because there's all kinds
of other bad stuff there.

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And so, what we believe is
that shutting off the PA cell

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means that they stop eating
that PA plant for a while.

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Not because of the
PAs, but because

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of all this other
stuff in there.

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