Preference/performance of Drosophila Suzukii females in 6 berry cultivars in southern Patagonia

MARTINEZ, AS; GERMANO MONICA; CARDOZO ANDREA; MASCIOCCHI, MAITÉ

Conferencia; Animal Behavior Live; 2021

The Spotted Wing Drosophila (SWD, Drosophila suzukii is a highlypolyphagous fruit pest native to Asia, which in the last decade had widelyexpanded its range and become a serious pest in America and Europe. SWD isknown to affect berries and other economically important fruits. Economiclosses can range up to 90% of the total yield. In order to improve current pestmanagement tools, the behavior of the fly under local conditions needs to bestudied thoroughly. In this context, our aim was to compare, through fieldtrials,  female SWDpreference/performance in 3 berry cultivars (2 raspberry and 1 blackberry) inPatagonia, Argentina where the fly has recently been detected and isproblematic. The study was conducted during the austral spring and summer of2019 in the Patagonian Andean Valleys of Argentina where fine fruits have beencultivated for more than 60 years. In order to achieve this, we deployedvinegar-baited traps in the field (18 traps in 2 farms) and also surveyed adultemergence from infected berries, thus quantifying SWD in flight and adultsemerging from fruits. This was done for each cultivar through part of theflight season. With this data, we calculated a preference indexes for eachcultivar, taking into account the number of females captured in vinegar trapsand flies (male and female) that emerged from fruit collected in the field andincubated in the laboratory in relation to the number of flies captured onaverage on each date/farm. Additionally, sugar concentration (BRIX) wasmeasured from collected fruit. Our results suggest that there is no effectonfemale  flight preference towardstrawberry varieties or blackberrys. Nevertheless, fruit emergence is higher onraspberries than strawberries. Results are discussed in an applied contextwhere environmentally-sound tools are necessary.  Keywords@font-face{font-family:"Cambria Math";panose-1:2 4 5 3 5 4 6 3 2 4;mso-font-charset:1;mso-generic-font-family:roman;mso-font-pitch:variable;mso-font-signature:0 0 0 0 0 0;}@font-face{font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;mso-font-charset:0;mso-generic-font-family:swiss;mso-font-pitch:variable;mso-font-signature:-536859905 -1073697537 9 0 511 0;}p.MsoNormal, li.MsoNormal, div.MsoNormal{mso-style-unhide:no;mso-style-qformat:yes;mso-style-parent:"";margin-top:0cm;margin-right:0cm;margin-bottom:8.0pt;margin-left:0cm;line-height:107%;mso-pagination:widow-orphan;font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-font-family:Calibri;mso-ansi-language:EN-US;}.MsoChpDefault{mso-style-type:export-only;mso-default-props:yes;font-size:11.0pt;mso-ansi-font-size:11.0pt;mso-bidi-font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ascii-font-family:Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN-US;}.MsoPapDefault{mso-style-type:export-only;margin-bottom:8.0pt;line-height:107%;}div.WordSection1{page:WordSection1;}