Yankeeweed (Eupatorium compositifolium)
Yardgrass (Eleusine indica)
Yarrow (Achillea spp.)
Yarrow, Common (Achillea millefolium)
Yaupon (Ilex vomitoria)
Yaupon, Desert (Schaefferia cuneifolia)
Yellow Leaf Blight (Phyllosticta maydis)
Yellow Leaf Blister (Taphrina aesculi)
Yellow Leaf Blister (Taphrina populina)
Yellow Leaf Blotch, Alfalfa (Leptotrochila medicaginus)
Yellow Leaf Spot (Pyrenophora spp)
Yellow Leaf Spot (Pyrenophora trichostoma)
Yellow leaf Spot (Pyrenophora tritici-repentis)
Yellow Patch (Rhizoctonia cerealis)
Yellow Rust (Phragmidium spp.)
Yellow Rust (various)
Yellow Rust, Canes (Keuhneola uredinia)