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Ry
 Post subject: Wasps are useful
PostPosted: Thu Jul 21, 2011 1:10 pm 
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Jap Crew
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Just had one in the office :lol: Drummed up the conversation. Yes they are useful and should not be killed - Here's why:

Most wasp species are predators. Their function is in the control of many other insect species. They are actually very effective parasitoids, and because of this efficiency they have been used for decades as biological control agents. Many crop pests including hornworms and scale insects which cost millions of dollars in loss annulally are controled by wasps.

Without these predators, tomatoes, oranges, tobacco, and many other important crops would be so scarce that the price of them would skyrocket.
Their method of efficiency is that they will lay one egg on the back of a caterpillar, and throught the process of polyembrony, the egg multiplies itself, producing hundreds of larvae. These larvae hatch, kill the caterpillar, and pupate. Once development is compltete, the newly formed wasps will emerge and go out in search of their own caterpillar to deposit eggs on.

After a year, there are millions of these wasps and they are naturally able to control the number of potentially devastating pest species.
In nature, most moths and beetles have some species of wasp that is their specific parasitoid. Without these parasitoids, longhorn beetles would reduce the forest to sawdust and caterpillars would strip every leaf off of every plant they can find. Wasps act to control theri numbers, and keep a balance between the pests and the hosts.
Certain wasps, like yellow jackets (the ones by the picnic table) are actually pollinators and ensure the survival of many plant species, just like their very close relatives, the bees.

:)

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Percy
 Post subject: Re: Wasps are useful
PostPosted: Thu Jul 21, 2011 1:26 pm 
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Like all species on this planet (except 1) they live in balance with the world around them.

The except one refers to humans, the parasite without a predator.

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EvilDes
 Post subject: Re: Wasps are useful
PostPosted: Fri Jul 22, 2011 8:40 am 
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Yeah, everything does indeed have it's use. It might not be apparant, but it does.

Unfortunately, the "use" of wasps to control pests is still a method of us controlling one species with another where it may not normally have occurred. So it's for our benefit, but what effects does it have elsewhere that we have no yet discovered? Obviously wasps are everywhere, but you introduce millions of them to one area to control pests on crops, and they have to go somewhere - they're not going to stay within the fields they're put into :lol:

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