Efficacia delle reti protettive, del rotenone e dello spinosad nel controllo di Ceratitis capitata (Wiedemann) su pesco biologico

Abstract

In the organic farming the control of Ceratitis capitata (Wiedemann) is problematic for late ripening peach cultivars. In 2007 and 2008 we tested a protective net, rotenone and spinosad in a biodynamic peach orchard in Castrofilippo (AG). Traps baited with Trimedlure were placed in July and observed weekly. In 2007 there were 3 plots: rotenone, net cover and untreated. In 2008 a thesis with spinosad was added. Since the beginning of August four rotenone and spinosad treatments were done weekly. The net plot was covered since the end of July. At the commercial harvesting sampling on peaches were done collecting and analysing 50 peaches for each thesis, recording infested fruits. First male captures were recorded at the end of July, with an average, at the commercial harvesting, of 5 adults/trap/week in the first and 11 in the second year. Statistic analyses performed on the different theses at each sampling date, show that infestation was almost absent and significantly lower in both years under the net (0-2%). In 2007 infestation in rotenone thesis reached 78% in the third sampling, showing statistically differences with the net thesis but not with the untreated one. In 2008, infestation in rotenone, spinosad and untreated plots (74-90%) did not show statistically significant differences.