Summary
Ecdysteroid titers were measured in whole-body extracts of pedogenetically reproducing larvae of the dipteran insectHeteropeza pygmaea and in the dietary fungus. The titers are very low in the first 3 days of larval growth, but increase during the last 2 days. The level of 20-hydroxyecdysone is then significantly higher than that of ecdysone. Measurements of the titers in the fungus gave no conclusive results.
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Supported by the Swiss National Science Foundation, grants No. 3.218-0.77 to D.F.W. and 3.714-0.80 to B.L. We thank Xiang-Xiong Zhu for help with the RIA and Mrs G. Rhyner for technical assistance. Gifts of ecdysone antiserum from Dr J. D. O'Connor and of 23,24-[3H2]-ecdysone from Dr J. Koolman are also gratefully acknowledged.
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Went, D.F., Gentinetta, V. & Lanzrein, B. Ecdysteroid titers during larval reproduction of the dipteran insectHeteropeza pygmae . Experientia 40, 998–1000 (1984). https://doi.org/10.1007/BF01946478
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DOI: https://doi.org/10.1007/BF01946478