poison oak, chiggers, poison sumac, urushiol, jewelweed, weeds, hogweed, stinging nettle, henbit, crabgrass, cow parsnip, foxtails, wild parsnip, ragweed, horsetail, fungus, pokeweed, webworms, powdery mildew, pachysandra, chickweed, dandelions, sumacs, brambles, buckthorn, knotweed, nutgrass, briars, purple loosestrife, pennyroyal, oxalis, witch hazel, phragmites, fleas, leaf scorch, mullein, reed canary grass, anthracnose, tansy ragwort, nutsedge, musk thistle, bush honeysuckle, root rot, creeping charlie, tansy, insect repellant, nettles, windburn, rocky mountain spotted fever, hay fever, photinia, leafminer, stinkweed, spider mite, briers, sunburn, toadflax, kudzu vine, garlic mustard, greenfly, pyracantha, liriope, loosestrife, teasel, lyme disease, cholla, honeysuckles, burdock, bearberry, thistles, tomato hornworm, creosote, fungal infection, aucuba, oleander, shrubs, silky dogwood, fungal, blackberry bush, comfrey, juglone, pinworms, pigweed, parthenium, ragwort, myrtle spurge, nightshades, colds, poison hemlock, quack grass, fleabane, crown vetch, hackberry, sunscald, gooseneck loosestrife, insect repellent, vitex, nut sedge, cocklebur, bindweed, skeeters, skunk cabbage

poisonous plant

markweed, poison mercury, rhus radicans, toxicodendron radicans