Štetočina jasena Tomostethus nigritus F. (Hymenoptera: Tenthredinidae)

Abstract

Proučavanje životnog ciklusa i dinamike populacija jasenove crne lisne ose sprovodi se od 2009. godine na području Beograda. Maršrutnom metodom su pregledana stabla belog jasena (Fraxinus excelsior L). Proučavanja su obavljena na zelenim prostorima i urbanim šumama Beograda u Košutnjaku i aluvijalnim šumama u priobalju reke Save. Sakupljani su razvojni stadijumi T. nigritus i donošeni u laboratoriju Šumarskog fakulteta Univerziteta u Beogradu radi daljeg proučavanja. Crna jasenova lisna osa je dobila ime po boji tela odraslog insekta, koji je potpuno crn, sa izuzetkom žućkastih butova. Krila su siva sa crnim prednjim delom. Potencijalna plodnost jedne ženke je 320 jaja. Jasenova crna lisna osa ima jednogodišnji životni ciklus. Deo populacije može da stupi u dijapauzu, što u toku istraživanja nije prelazilo 7% populacije. Do sada su sprovedena istraživanja na belom jasenu i njegovim kultivarima, ali bi trebalo ispitati spektar drugih vrsta jasena kao potencijalnih domaćina crne jasenove lisne ose. .

The research on life cycle and population dynamics od T. nigritus has been conducted since 2009. Common ash (Fraxinus excelsior L.) trees were inspected using itinerary method. Investigation of white ash pests was done in parks and urban forests of Belgrade - Košutnjak, and in alluvial forests near Sava River. Various development stages of T. nigritus were collected in urban forests and brought to the laboratory of the Faculty of Forestry University of Belgrade for further research. This species got its name to the color of grown insect, which is black with the exception of yellow femur. Wings are gray with black front part. Potential fertility of one female is app. 320 eggs. Tomostethus nigritus has annual life cycle. It can enter diapauses and during the research it was not more then 7% of the population that stood in diapauses. There is need to continue the research of other ash trees as potential host plants of T. nigritus. .