Observations were carried out in an organic vineyard (cv malvasia di candia), at salemi(sicily), during 2006-2007, in order to verify the influence of grapevine moth lobesia botrana (den. &schif.) on presence of ochratoxin a (ota) in bunches at harvest time. a percentage of 12.98% of buncheswere attacked by grape moth during 2006, while 8.65% of them were infected by grey mould and sourbunch rot (5.77% and 2.88% respectivelly). analyses carried out on 12.98% infested bunches, showeda level of 20 μg/kg of ota, while on intact samples 0.04 μg/kg of toxin was registered.During 2007, infestation of bunches by grape moth was very low (2.05%), due to the particularclimatic conditions, and no infections by grey mould and sour bunch rot were registered at harvesttime. analyses on 2.05% infested bunches by l. botrana showed a presence of 0.055 μg/kg of ota,while no detectable presence of toxin was registered on intact bunches (<0.014 μg/kg). two aspergillusspecies were recorded in 2007: the most representative was aspergillus fumaricus wehm (86%) whichis not considered the producer of ota, while 14% was aspergillus fonsecaeus (thom & raper)considered as the probably producer of the toxin.
|Numero di pagine||6|
|Stato di pubblicazione||Published - 2008|