Biodiverzitet i značaj parazitoida scolytus mgulosus

Abstract

Parazitoidni kompleks Scolytus rugulosus Müller (Coleoptera, Scolytidae) obuhvata 11 vrsta iz šest familija reda Hymenoptera: Doryctes pomarius Reinhard, Dendrosoterprotuberans Ness., Spathhts brevicaudis Ratzeburg Ecphylus silesiacus Ratzeburg (Braconidae), Eurytoma morio Boheman (Eurytomidae), Cheiropachiis quadrum F., Rhaphitelus maculatus Walker (Pteromalidae), Calo-sota aestivalis Curtis (Eupelmidae), Tetrastichus ulmi Erdös, Entedon ergias Walker (Eulophidae), Scleroderma domesticus Klug (Bethylidae). Među konstatovanim parazitoidima, vrsta Rhaphitelus maculatus ima najveći uticaj na brojnost S.rugulosus. Ona je konstatovana u 73,7 % ispitivanih uzoraka, njena dominantnost bila je 53,7 % a procenat parazitiranosti S.rugulosus 23,9 %. Pored nje, veći uticaj na brojnost S.rugulosus imaju i vrste Ecphylus silesiacus, Cheiropachiis quadrum Entedon ergias and Eurytoma morio. Značaj ostalih parazitoida je mali. Parazitoidi imaju veliki uticaj na brojnost S.rugulosus, pošto redukuju brojnost svog domaćina u prošeku za 44,5 %.

The parasitoid complex of Scolytus ruguloxux Müller includes 11 species of six families of Hymenoptera: Doryctex pomarius Reinhard, Dendrosoter protuberans Ness., Spathius brevicaudis Ratzeburg, Ecphylus silexiacux Ratzeburg (Braconidae), Euryloma morio Boheman (Eurytomidae), Cheiropachux quadrum F., Rhuphitelus maculatux Walker (Pteromali-dae), Calosota aextivalix Curtis (Eupelmidae), Tetrastichus ulmi Erdös, Entedon ergias Walker (Eulophidae), Scleroderma domesticus Klug (Bethylidae). Among the abovementioned parasitoids, the species Rhuphitelus maculatux had the greatest influence on S.rugulosus abundance. It was identified in 73.7 % of examined samples, its average domination was 53.7 %, and average percent of S.rugulosus parasitism was 23.9 %. Besides, the species Ecphylus xilexiacux Cheiropachus quudrum, Entedon ergias and Eurytoma morio had a strong effect on S.rugulosus abundance. The significance of other parasitoids was low. Parasitoids have a great influence on the abundance of S.rugulosux because they reduce the abundance of their host 44.5 % on average.