RESEARCH CONCERNING THE ATTACK BY CYDIA POMONELLA L. ON APPLE IN THE TIMIŞOARA AREA IN 2008 PUBLISHEDDoru Ion Petanec, Lavinia Mădălina Micu
In Romania, the attack of Cydia pomonella on apple trees results in a high percentage of wormy fruit that can reach up to 70% in certain years, which diminishes yield with the same percentage. Fruit attacked are damaged qualitatively, fall earlier than normal and rot because of the infection by Monilia fructigena. Research aimed at establishing the intensity of Cydia pomonella butterfly flight in the Timişoara area in 2008. The biological threshold in Cydia pomonella was established at 9ºC. To determine flight curve in butterflies, we set pheromone ATRA POM traps starting with May 1 st , 2008, 2-3 weeks before the supposed appearance of the butterflies, taking into account that the first generation appears around May-June, and the second one about July-August. We recorded captures 3 times a week to develop flight curve. After each monitoring, the butterflies were removed from gluey the traps. When temperature went below 15 0 C and precipitations were above 10 mm, we made no observations and recorded no data. Results of observations will be supplied to the farmers, if required. In 2008, on May 20, we collected the largest number of Cydia pomonella from the pheromone traps set in the orchard. The lowest number of captures was in the first days of May. We lanced the warning three days after recording the maximum number of 28 individuals. For second generation, maximum captures recorded in 2008 on July 17, and the lowest number of captures was in the first days of July. The warning for second generation we lanced in 2008 on July 20, after recording the maximum number of 99 individuals.
apples; atack; Cydia pomonella; flight curve