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Pediobius foveolatus

Pediobius foveolatus is a small chalcid wasp, one of many commercially available, beneficial parasitic wasps. This tiny predator - about 3 mm or 1/8 inch in length - is effective against Mexican bean beetles and squash beetles.

Pediobius foveolatus does not do as well against large-scale, established infestations. Instead, introduce these predators just as beetle larvae emerge, early in the season, so that as beetles multiply, so do the wasps - the so-called inoculative release. Large-scale growers will often plant snap beans very early on the season to attract Mexican beetles, then release Pediobius wasps soon after, so that the parasite is well established at the time of the main crop.

This wasp does not overwinter, and will need to be reintroduced annually; two or three releases may be required. They are shipped as Mexican bean 'mummies', that is, infected larvae. Each contains about 20 wasps. Follow the supplier's instructions.

See Also

Chalcid wasps
Parasitic wasps

Related Topics

Mexican bean beetles

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