Comparison of Radiographic and Classical Techniques to Determine the Condition of Gypsy Moth Pupae1

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Abstract
Radiographic, dissection, and laboratory-rearing techniques were compared for accuracy, time, and cost for differentiating healthy, parasitized, and other dead pupae of Lymantria dispar (L.). All techniques distinguished healthy pupae, parasitism by Blepharipa scutellata (Robineau-Desvoidy) and Brachymeria intermedia (Nees), and other dead pupae. Time and cost of classical techniques were related to sample size and were most efficient for samples < 100. The efficiency of the radiographic technique increased with sample size and was economically feasible for larger samples.

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