Observation 286379: Peronospora belbahrii

When: 2017-08-14

Collection location: Montgomery Co., Maryland, USA [Click for map]

Who: Martin Livezey (MLivezey)

No specimen available

Notes:
Basil downy mildew is destroying my pesto! Oomycota!

Images

Lemon shaped sporangia on branch-like sporangiaphore
Lemon shaped sporangia on branch-like sporangiaphore
Lemon shaped sporangia on branch-like sporangiaphore
broken sporangia?
Lemon shaped sporangia on branch-like sporangiaphore
Lemon shaped sporangia on branch-like sporangiaphore
Stroma on bottom of basil leaf
Sporangia
Stereo microscope
Basil plant with rapidly yellowing leaves and some dark spots
Basil plants with rapidly yellowing leaves and some dark spots
Underside of basil leaf showing dark sporangia and webby sporangiophores
Underside of basil leaf showing dark sporangia and webby sporangiophores; top of leaf is turning yellow from infection

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