Spilocaea oleaginea

About

Venturia oleaginea is a fungal plant pathogen, the cause of the disease peacock leaf spot, also known as olive peacock spot, olive leaf spot and bird's eye spot. This plant disease commonly affects the leaves of olive trees worldwide. The disease affects trees throughout the growing season and can cause significant losses in yield. The disease causes blemishes on the fruit, delays ripening, and reduces the yield of oil. Defoliation and in severe cases, twig death, can occur, and the disease can have long-term health effects on the trees.

Summary from Wikipedia