Jacket Rot (Botrytis cinerea)
Jacket Rot (Monilinia spp.)
Jacket Rot (Sclerotinia spp.)
Jacket Rot (various)
Jacob's-ladder (Polemonium spp.)
Jacob's-ladder/Charity (Polemonium caeruleum)
Jassid (Cicadellidae)
Jewelweed (Impatiens spp.)
Jewgrass, Annual (Microstegium vimineum)
Jimsonweed (Datura stramonium)
Job's-tears (Coix Lacryma-Jobi)
Joe-pye weed (Eupatorium spp.)
Johnsongrass (Sorghum halepense)
Johnsongrass, Rhizome (Sorghum halepense)
Johnsongrass, Rhizome (Sorghum vulgare)
Johnsongrass, Seedling (Sorghum halepense)
Johnsongrass, Seedling (Sorghum vulgare)
Jointgrass, Blue (Calamagrostis canadensis)
Jointvetch (Aeschynomene spp.)
Jointvetch, Indian (Aeschynomene indica)
Jointvetch, Northern (Aeschynomene virginica)