All NewsSnapshotsStudentsPhD Candidate Drum Discusses Biology Research during Graduate Speaker Series Olivia DrakeOctober 8, 20203minZachary Drum, a PhD candidate in biology, delivered the first 2020–21 Graduate Speaker Series talk on Oct. 2 through Zoom. Drum’s advisor is Joseph Coolon, assistant professor of biology. The Coolon Lab uses genetic and genomic tools to better understand how insects evolve to form a resistance to pesticides, damaging $10 billion in crops annually. Titled “The Forbidden Fruit: How Drosophila sechellia came to Love Morinda citrifolia,” Drum’s research explores how a fruit fly species in Seychelles is able to eat a poisonous fruit (noni) that flies in the rest of the world would find toxic. Ripe noni fruit contains the fatty acid volatiles octanoic acid and hexanoic acid, which are poisonous to other Drosophila species. “The host fruit has these chemicals that they [sechellia] like, and other flies don’t. They’re attracted and resistant to the fatty acid volatiles in the noni fruit,” Drum explained. “So we’re trying to build this puzzle. How does it resist these volatiles?” (Slide show photo by Charlotte Freeland) Drum explained the two types of Drosophila sensory organs used for smelling, based on past research. Graduate Speaker Series events are open to the entire Wesleyan community. graduate students Related Articles All NewsCampus News & Events March 27, 2024 Mike Mavredakis Hugo L. Black Lecturers Establish What’s at Stake When Free Expression on Campus is Imperiled All NewsArts & HumanitiesStudents March 25, 2024 Andrew Chatfield Art Comes to Life through Student Partnership with the Center for the Arts All NewsAlumni March 25, 2024 Steve Scarpa True ‘Blue’: James Kaplan ’73 Documents a Key Collaboration in Jazz History