Volatile profile of quince varieties (Cydonia oblonga Mill.) by damage of codling moth (Cydia pomonella L.)

MARÍA PÍA GÓMEZ; FLAVIA JOFRE BARUD; LIZA LÓPEZ

Congreso; 5th Congress of the Latin American Association of Chemical Ecology; 2018

Latin American Association of Chemical Ecology (ALAEQ)

Quince (Cydonia oblonga Mill.) is one of the main fruit crops in San Juan province,Argentina. Codling moth (Cydia pomonella L.), a worlwide oligophagous pest generatesa great discard of quinces production. The host finding is mediated by volatilecompounds released by plants. The fruit profile compounds changes in response todamage by codling moth. The aim of this study was to determine the volatile profilecompounds of fruits and leaves at ripening stage, in 6 varieties of quince (Champion,Portugal, Smyrna, INTA 37, INTANDINO 117 and INTA 147). Experiments wereconducted at the experimental field of INTA-Pocito (San Juan, Argentina). After the fruitset, branches of the different varieties were protected with fabric bags, to prevent the pestentry. At ripening stage, fruits and leaves of branches exposed and protected of the pestwere sampled. Volatile profiles were determined by SPME-GC/MS analyses. Twochemicals groups were observed for the fruits: sesquiterpenes and esters, with 86% and7% of the average relative area, respectively. In all fruits alpha-farnesene was the maincompound, and its content increased in fruits affected by codling moth damage in certainvarieties. In leaf samples, the profile was dominated by aldehydes and alcohols, with 54%and 34% of the average relative area, respectively. These results, in a preliminary nature,fill out absent information for quince cultivation and its interaction with codling moth.