- Author: Kathy Keatley Garvey
Native to Southeast Asia, Drosophila suzukii infests soft-skinned fruits such as strawberries, raspberries, cherries, blueberries, blackberries, peaches and grapes. The insect was first detected in the United States in 2008 when scientists identified it in the central coastal region of California. It can cause an estimated $300 million in damage annually to California crops.
Enter Kent Daane, Cooperative Extension specialist at UC Berkeley. He'll present a UC Davis seminar, hosted by the UC Davis Department of Entomology and Nematology, on "Classical Bio-Control of the Spotted Wing Drosophila: Collecting and Processing Parasitoids Through the Quarantine Process" from 4:10 to 5 p.m., Wednesday, April 18 in 122 Briggs Hall, located off Kleiber Hall Drive.
"A classical bio-control program has been undertaken against the olive fly using parasitoids imported from Africa and the spotted wing drosophila, both newly invasive species in California," Daane says. "Drs. Xingeng Wang and Antonio Biondi have been cooperating with other researchers in California, Oregon, Delaware, Hawaii, Italy, China, South Africa, South Korea and France by quarantine screening imported parasitoid species to determine their potential to control these invasive pests without causing any harm to non-target insects. The quarantine work is like the gatekeeper that screens imported material to allow only those natural enemies that will be beneficial into California."
The spotted-wing drosophila was first observed in Japan as early as 1916. The females lay their eggs in ripe and ripening fruit, unlike other Drosophila species known to infest overripe and blemished fruit. The larvae feed on the fruit. The adult is the only stage that can be targeted for control by conventional pesticides, according to integrated pest management specialist Frank Zalom, distinguished professor of entomology at UC Davis. The most commonly used insecticides are organophosphates, pyrethroids and spinosyns.
Daane, who received his doctorate in entomology from UC Berkeley, focuses his research on the development of ecologically-based insect pest management systems. His research studies include classical biological control, augmentation programs, insect-plant interactions, use of least-disruptive insecticides and the biology of natural enemies."
Coordinators of the department's seminars are Rachel Vannette, assistant professor, and Brendon Boudinot, Ph.D candidate, Phil Ward lab.