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Layer of larvae (thickness + 8 cm) of Tomostethus nigritus near the base of the stem of Fraxinus angustifolia, Ghent (BE), 30.IV.2019 Fons Verheyde. |
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| Part of: Verheyde F, Sioen G (2019) Outbreaks of Tomostethus nigritus (Fabricius, 1804) (Hymenoptera, Tenthredinidae) on Fraxinus angustifolia ‘Raywood’ in Belgium. Journal of Hymenoptera Research 72: 67-81. https://doi.org/10.3897/jhr.72.38284 |