THE DYNAMICS OF RHAGOLETIS CERASI POPULATIONS IN CLIMATIC CONDITIONS OF WESTERN ROMANIA PUBLISHEDDaniela Minca, Ana-Maria Vîrteiu, Doru Petanec
This study proposed investigation the way in which weather conditions had influenced the cherries fly activity Rhagoletis cerasi, which represented the most important pest of sour cherry and bird sour cherry crops. It was known that the attack produced by that pest diminished in great measure the fruits production. Dynamics of Rhagoletis cerasi populations was investigated in sour cherry crop, in weather conditions of Dumbravita region, Timis district. To establish populations dynamics of sour cherry fly were used different types of adhesive traps. In every tree were placed adhesive traps of type RAG and SZs. Investigation concerning the establishement of populations dynamics of sour cherry fly had been realized beginning with the year 2007 to 2009, during 20-23 days. The first adults captured in year 2007 were registered in 20 th of May, in the year 2008- in 18th of May and in the year 2009- in 23th of May. In the year 2007 the most intense period of flight was registered in 06.06. characterised by a temperature of 21,7 degree C and a humidity of 65%. In the year 2008 the maximum level concerning the activity of Rhagoletis cerasi species, was touched in 07.06. characterised by a temperature of 26,1 degree C and an atmosphere humidity of 46%. In the year 2009 the most intense period of the flies was in 07.06. characterised by a temperature of 26,1 degree C and an atmosphere humidity of 46%. In the three experimental years was observed that the traps of types SZs gave the best results in monitoring Rhagoletis cerasi species. The populations dynamics of Rhagoletis cerasi in the three experimental years had presented a similar evolution with some variations, the first adults appeared between the second and third decade of May month, and afterwards will follow a decrease period, generally thanks to very low temperatures for that month of May, and followed by an increase when was also touched the maximum level.
Rhagoletis cerasi, dynamics, traps