On Friday biotechnology experts, local agriculture officers and students witnessed the 15th harvesting of the genetically modified Bt eggplant, showing similar high consistency as in three other tests elsewhere in the country in warding off attacks by the main damaging pest, the fruit-and-shoot borer. The field test inside the University of Southern Mindanao campus would conduct three more harvests until July 10 to wrap up the first round of transplanting of the hybrid-eggplant variety, said Dr. Concepcion Bravo, the co-project leader and the former chairman of the USM Department of Entomology.