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Steinernema feltiae for phorid flies


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What do you want to use them for?

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I think that anything that affects such a wide range of insect groups would also be harmful to roaches. The product description even states that it can be used against termites, which are essentially cockroaches.

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Hmm.. yeah. What if it just so happens that they prefer a cockroach host over a fly host when given both options, because the cockroach is larger and offers more food or has a higher fat content or something like that. Then they might end up parasitizing more roaches than flies! It could be an interesting experiment though.

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The only thing is how they kill a host. It seems they must do this to keep the life cycle going. I would think to a large roach it might be similar to a spider bite for us, especially the species I mentioned, as their target host seems to not be roaches. But it still sounds like a sketchy test.

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