WALNUT HUSK FLY (RHAGOLETIS COMPLETA CRESSON) IN SLOVENIA - SEASONAL DYNAMICS AS FOLLOWED IN MARIBOR (NE)
In Slovenia, walnut husk fly (WHF) was first recorded in 1997, in the SW part of the country. Nowadays, it is active all over the country except in the area close to the Slovenian - Hungarian border. Observations, performed during the year 2003, showed that in the Maribor area (NE), losses due to WHF damage exceeded 50%. Over the last three years, substantial efforts have been made to improve our knowledge of the WHF, and to find an efficient method of control. During the years 2007 and 2008, the seasonal dynamics of the WHF were followed at two locations. In 2007, flies were present from 16 July to 12 September. Using yellow sticky plates, three peaks of adult emergence (27 July, 7 August and 12 September) were recorded in Maribor, while in Razvanje, only one peak (21 August) was noted. In 2008, the adults appeared twelve days later than in the previous year, and were caught until 23 September on both locations. Two peaks of emergence have been observed in Maribor (31 July and 8 September), as well as in Razvanje (31 July and 14 August). The WHF was monitored using three types of yellow sticky plates. Considering their surface and the number of the caught flies, the plate Rebell® amarillo (Andermatt Biocontrol AG) was the most efficient. It seems that topography of the walnut orchard (flat or slope), as well as weather conditions (presence or absence of wind) may influence the seasonal dynamics of the WHF. Long-term observations should be conducted in order to formulate efficient control measures.
Miklavc,, J., Matko, B., Mel, M., tampar, F. and Solar, A. (2010). WALNUT HUSK FLY (RHAGOLETIS COMPLETA CRESSON) IN SLOVENIA - SEASONAL DYNAMICS AS FOLLOWED IN MARIBOR (NE). Acta Hortic. 861, 389-394
Rhagoletis completa Cresson, yellow sticky plates, peaks of emergence