Uherkovich Ákos: A Villányi-hegység botanikai és zoológiai alapfelmérése (Dunántúli Dolgozatok Természettudományi Sorozat 10., 2000)

Nagy, Antal & Nagy, Barnabás : The Orthoptera of the Villány Hilss (South Hungary) - A Villányi-hegység egyenesszárnyú (Orthoptera) faunája

152 DUNÁNTÚLI DOLGOZATOK (A) TERMÉSZETTUDOMÁNYI SOROZAT 10. (2000) The main threats for most of the Orthoptera species are the parcelling of the fields by agriculture (especially vineyards) and the occasional burning down of the grasslands and shrubs (e.g. the Szársomlyó was partly burned twice in 2000). Grasshoppers (and other insects) laying their eggs in plant stem are mainly destroyed by these fires. Until now there have not been exact data on the effect of large-scale using of insecticides in the vineyards. The cultivated areas are often make mosaic with natural and/or seminatural habitats (grasslands, shrubforests) and accidental insecticid pollutions can diminish and even destroy insect populations. Acknowledgements The authors thank to J. Majer for loaning his collected material (Szársomlyó 1988, 1991), which was not treated till now. The first author of this paper would like to thank I. Rácz and Z. Varga for giving useful hints and for their helpfulness, to K. M. Orci for his help in the identification, to A. Dénes for his help in the field trips, to Á. Uherkovich giving advises in the bibliography, to P. Sólymos and J. Mezei for their help in sampling, the Duna-Dráva National Park for permissions and to L. Bachmann for lodging. The research was made with the financial aid of "Students for Science" section of the Pro Renovanda Cultura Hungáriáé Foundation. The second author's grant ( OTKA T 025355) was also supporting this work.