edit this paragraph symptoms leaves in leaf lesion round to nearly round , sizes 2 -6mm , central light brown around the edges of color depth , sometimes students a small amount of brown small dots on the lesion , that pathogen conidia .
edit of this paragraph the pathogen Phyl10sticta ligustri Sacc . Said privet Phyllosticta , is a semi- known bacteria Amon fungi . Conidia born in foliage , early buried Health , scattered or Poly Health , after a breakthrough in the epidermis exposed , convex mirror-like , the size of 72 - 88 μm . Conidia nearly oblong, Aeromonas colorless, within oily ball 2 , the size of 5-7 × 2.5-3 (μm).
edit the route of transmission and incidence conditions bacteria summering or wintering conidia in diseased leaves next spring conditions are suitable for to produce conidia primary infection and re- infection . The rainy or humidity Italy its onset .