Il metodo della confusione nel controllo di Cydia molesta (Busck) e Anarsia lineatella Zell. in un pescheto della Toscana

The mating disruption technique in the control of Cydia molesta (Busck) and Anarsia lineatella Zell. in a peach orchard in Tuscany. Trials to control the tortricid Cydia molesta and the gelechiid Anarsia lineatella by mating disruption using sex pheromones were carried out in a peach orchard in Tuscany, Italy, in 1989. Dispensers were distributed in the field at the end of March, at the rate of one per tree, except on the perimeter of the orchard where trees received 2 dispensers each, to give a total of about 800 dispensers per hectare. Three pheromone traps for C. molesta and 3 for A. lineatella were placed in the peach orchard to monitor the presence of males. The same number were also placed in a nearby peach orchard which served as a control. In addition, observations of the shoots and fruits were made periodically. Trap catches in the experimental orchard were notably less than those in the control orchard. However, the distribution of sex pheromone did not result in effective protection of the shoots and fruits from attack by the moths, despite the fact that the rate of infestation of fruit harvested in the first half of September was lower in the experimental orchard (1.70-3.03%) than in the control (4.5%).