Crayfish Control

I have a farm pond plagued with crawdads that undermine the banks, causing them to collapse. The resulting shallow water warms up enough to permit algae to grow and allow cattails to take over.

The county conservation people advised me to pour a mixture of fuel oil and mothballs down the crawdad holes, but I felt that action would contaminate the pond (besides, there are hundreds of holes!).

Can you suggest a nonpolluting way to eradicate the creatures?

Do you really want to eradicate the crayfish (or crawdads), or do you just want to control them? It sounds to me as though your problem isn’t crayfish, but rather too many crayfish.

To improve the situation, you’ll first need to see whether your water level is stable. Crayfish reproduction is favored by a fluctuating water level (which in itself can undermine pond banks). If there are measures you can take to stabilize the water level, do so. This won’t eradicate the crustaceans, but it will reduce the population.

  • Published on Jan 28, 2011
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