Humoral Encapsulatinon of the Fungus Erynia Radicans (Entomophthorales) by the Potato Leafhopper Empoasca Fabae (Hemiptera)
Journal of Invertebrate Pathology
The immune response of the potato leafhopper, Empoasca fabae, to fungal infection is humoral encapsulation. Noncellular, melanotic capsules were formed around invading hyphae of Erynia radicans, Metarhizium anisopliae, and Hirsutella guyana. Melanization of E. radicans hyphae was observed in the cuticle, epidermis, and hemolymph of infected leafhoppers, in some cases within 4-6 hr post-inoculation. The encapsulation response was nearly always ineffective in preventing fungal infection. Rarely, hyphae in the hemolymph were completely encased in thick melanotic capsules. Thin sections of melanized hyphae showed the melanin to be a granular, electron-opaque substance. A few hyphae were observed coated with a filamentous, electron-opaque substance which also may be melanin.
Butt, T.M., S.P. Wraight, S. Galaini-Wraight, R.A. Humber, D.W. Roberts and R.S. Soper. 1988. Humoral encapsulatinon of the fungus Erynia radicans (Entomophthorales) by the potato leafhopper Empoasca fabae (Hemiptera). J. Invertebrate Pathology 52: 49-56.