Selection of Lactic Acid Bacteria Species and Strains for Efficient Trapping of <i>Drosophila suzukii</i>

oleh: Amani Alawamleh, Gordana Ðurović, Giuseppe Maddalena, Raffaele Guzzon, Sonia Ganassi, Maaz Maqsood Hashmi, Felix Wäckers, Gianfranco Anfora, Antonio De Cristofaro

Format: Article
Diterbitkan: MDPI AG 2021-02-01

Deskripsi

(1) Monitoring of <i>Drosophila suzukii</i> is based on the use of effective traps and baits. The current baits are insufficient to provide efficient monitoring. The use of bacteria as bio-catalyzers to produce bioactive volatiles may improve flies’ attraction. Thus, we conducted this work to improve Droskidrink<sup>®</sup> bait’s attractiveness using lactic acid bacteria. (2) Different baits that were based on the use of Droskidrink<sup>®</sup> were assessed for flies’ attraction in a Droso-Trap<sup>®</sup> in a vineyard. <i>Oenococcus oeni</i>, <i>Pediococcus</i> spp., and <i>Lactobacillus</i> spp. were used. The performance of the most attractive species, <i>O. oeni</i>, inoculated into Droskidrink<sup>®</sup> was assessed in laboratory tests. The responses of female flies to volatiles produced by Droskidrink<sup>®</sup> with <i>O. oeni</i> strains were recorded by electroantennography. (3) Preliminary field assessment of baits recorded <i>O. oeni</i> as the most attractive species. Three strain groups showed adaptation to test conditions. Volatiles extracted by the headspace of baits inoculated with <i>O. oeni</i>, elicited electroantennographic responses from fly antennae. (4) Droskidrink<sup>®</sup> inoculated with <i>O. oeni</i> is a highly attractive bait for monitoring. These findings will be useful for improving the attractiveness of <i>D. suzukii</i> commercial baits based on the utilization of LAB volatiles in a strain-dependent manner.