Kabatiella Diseases (Kabatiella spp.)
Kangaroo Rat (Dipodomys spp.)
Kangaroo Rat, Banner-Tailed (Dipodomys spectabilis)
Kangaroo Rat, Merriam's (Dipodomys merriami)
Kangaroo Rat, Ord's (Dipodomys ordii)
Kangkong (Ipomoea aquatica)
Karnal Bunt (Tilletia indica Mitra)
Katydid (Tettigoniidae)
Katydid, Angularwinged (Microcentrum retinerve)
Katydid, Forktailed bush (Scudderia furcata)
Ked, Sheep (Melophagus ovinus)
Kermes, Oak (Kermes pubescens)
Kernel Blight (Alternaria spp.)
Kernel Rot (Fusarium spp.)
Kernel Rot (Gloeosporium spp.)
Kernel Smut (Neovossia barclayana)
Kernel Smut (Tilletia barclayana)
Khakiweed (Alternanthera caracasana)
Khakiweed (Alternanthera pungens)
Kidneywood, Texas (Eysenhardtia texana)
Kikuyugrass (Pennisetum clandestinum)
Klamathweed (Hypericum perforatum L.)