Re: Grasshoppers

jhaskett@asrr.arsusda.gov
Thu, 27 Jul 1995 11:39:27 -0400 (EDT)

This sure makes sense to me. I'm not an entomologist (and I don't play
one on TV) but I know that insects are very sensitive to aromatic chemicals.
For example the "swarm attack" phenomenonof "killer" bees is brought on
by the release of chemical by one bee when an intruder is encountered,this
causes aggression in that bee and also causes the other bees to release
the chemical causing a cascade of chemical release and aggression (this
is recalled vaguely from memory so if I've got it all wrong I apologize).
So it would seem to be adabptive that a dead, dying, or smashed hopper
would release a chemcial that other hoppers would interpret as
"dead hoppers = bad ju-ju = stay away". A test of the protective aspect
of this hypothesis would seem relatively easy.

Cheers,
Jonathan Haskett

On Wed, 26 Jul 1995, Georgann K. Cunney wrote:

> Hello all,
>
> I was living near Grants Pass, Oregon from 1975 - 80, I had a half acre
> garden. I was learning about biodynamic farming at the time...
> My garden was directly across a little dirt road from a very large
> meadow. It was very dry there (also, it was the beginning of a few
> year long drought) and we could only get half a gallon of water a minute
> from our well. The first year our garden was wonderful til the grass-
> hoppers came and devoured nearly all of it.
>
> We discovered a remedy that seemed to be fairly effective (to make a long
> story short). We had a large bucket of water in the garden to attrack
> birds to bath and drink, in hopes that they might also eat the grass-
> hoppers. This didn't appear to work. But instead many grasshoppers
> landed in the bucket and in the hot sun after about a week, made a very
> dark, smelly brew. We strained it and used it as a spray throughout the
> garden. It worked, they actually refrained from munching. We would
> collect them into bottles of water which we let sit out in the sun for
> a week of so and then strain it to spray. We also tried (I know this
> sounds despicable) puting this in the blender, but it was messy, very
> unpleasant and difficult to strain.
>
> I've wondered though how effective this really was. I don't know much
> about grasshoppers, maybe they eat ferociously up to a certain phase in
> their lifespan and then less? It seemed like they were still eating
> all around the garden. The fact that the garden was the only real green
> vegetation around made it all the more inviting - vulnerable.
>
> I'm sure someone on this list would know more about this topic and
> approach. I'd be curious to hear whatever that may be.
>
> I guess this is just about prime grasshopper season.
> Goodluck,
> Georgann
>