Effects of age, temperature, and previous infection on the development of Physaloptera maxillaris (Nematoda: Physalopteroidea) in field crickets (Acheta pennsylvanicus)

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Abstract
Larvae of Physaloptera maxillaris developed to the stage infective to skunk in only 9 days in adult crickets held at 30 °C. The growth rate and final length of third-stage larvae of P. maxillaris were greater in adult crickets held at higher temperatures (i.e. 30 °C) than at lower temperatures (i.e. 20.25 °C).Crickets as young as 1 week of age were successfully infected with P. maxillaris. Third-stage larvae that were recovered from older nymphs tended to be shorter than larvae in younger nymphs. There was no correlation between mean larval length at 25 days after infection, and the total number of larvae per cricket in older nymphs. Adult and nymphal crickets were successfully given challenge infections.

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