Final diagnosis


Taro Shot Hole Disease (Phoma spp.)

Taro
Several necrotic spots dot an area of ​​the leaf blade of this taro leaf. Note the yellowing of the latter around the lesions. <b><i>Phoma</i> spp.</b> (taro shot hole disease)
Appearance of necrotic lesions caused by <b><i>Phoma</i> spp.</b> on the underside of taro leaves.
The more or less extensive lesions are necrotic, surrounded by a yellow halo, and show circular and concentric patterns. Note the decomposition of tissue giving way to holes. <b><i>Phoma</i> spp.</b>
Detail of a necrotic lesion on a taro leaf. <b><i>Phoma</i> spp.</b>
Microscopie1.jpg
Observation under the microscope of pycnidia of a <i><b>Phoma</i> sp.</b> present on a necrotic area of ​​a taro leaf affected with pitting.
Spores emerging from a pycnidia of a <i><b>Phoma</i> sp.</b> responsible for the sifting of taro.
Cluster of pycnidiospores emerging from a pycnidia of a <i><b>Phoma</i> sp.</b> responsible for the sifting of taro.