Fuente: WIPO "tomato" Disclosed herein are methods for producing interfering RNA larvicides for Spotted Wing Drosophila, D. suzukii, such as microbial host organisms engineered to produce interfering RNA (iRNA) molecules which selectively undermine the survival of female D. suzukii larva, to produce a predominantly male population of adult SWD flies. Such iRNA molecules selectively inhibit the expression of a gene in female SWD larvae population by RNA interference. Also disclosed herein are polynucleotides, such as expression cassettes encoding iRNA molecules and facilitating integration, such as stable integration into the genome of a host cell. Further disclosed herein are compositions including the disclosed nucleotide sequences and host organisms, along with methods of using the same to generate a predominately male SWD population.