Iris yellow spot of onion and garlic
Iris yellow spot virus
Symptoms of iris yellow spot on onion include yellow- to straw-colored lesions on leaves and scapes. Dry, elongated lesions or flecks may resemble thrips injury. Lesions may be diamond shaped (this occurs rarely on leaves, more commonly on scapes). Late in the season, infected seed stalks and leaves may lodge. Plant vigor and bulb size are reduced.