Weed Index 2016 - 2023 - Landscape and Nursery IPM Alert (links are set back to 2019)
| WEED | DATE OF REPORT |
|---|---|
| Amaranth, palmer | 17July07 |
| Bamboo (Phyllostachys aurea and P. aureosulcata) | 23Aug04 |
| Bedstraw, catchweed | 20Jun26 19Jun07 |
| Beefsteak plant (Perilla frutescens) | 20Sep11 19Nov01 |
| Bindweed, field | 21Jul16 20Jul24 |
| Bittercress, hairy | |
| Bittersweet, Oriental | 23Aug25, 23Jun16 22Oct21 21Sep10 |
| Bluegrass, annual and roughstalk |
22Jul15 (annual), 22May13 (roughstalk) 18Apr27 |
| Broomsedge | 17Aug25 |
| Burcucumber | 16Oct07 |
| Burnweed, American | 18Sep14 |
| Buttercup, bulbosus (Ranunculus bulbosus) | 22Apr15 21May07 16May20 |
| Buttonweed, Virginia | 20Oct02 |
| Carpetgrass, small (Arthraxon hispidus) | 22Aug12 19Jul12 |
| Carrot, wild | 22Sep09 |
| Chameleon plant | 21Jun18 |
| Chickory (Cichoriium intybus) | 16Oct21 |
| Chickweed, common |
20Apr17 |
| Cow parsnip | 22Apr22 |
| Crabgrass | |
| Crow-dipper (Pinellia ternata) | 17May19 |
| Curly dock | 23Oct06 |
| Deadnettle, purple | 23Nov03 20May15 19Mar29 17Mar31 16Apr22 |
| Deadnettle, white spotted (Lamium maculatum) | 16Apr08 |
| Dodder | 20Aug21 19Jul26 |
| Dogbane, hemp | 22Jul08 |
| Eastern black nightshade | 17Jul21 |
| Fall germinating weeds | 22Aug05 |
| False green kyllinga | 17Jul14 |
| False (also fool's) parsley (Aethusa cynapium) | 16May27 |
| Foxtail, giant | |
| Foxtail, yellow | 23Jun30 17Sep29 |
| Garlic, wild | 20Oct23 |
| Geranium, Carolina |
17Apr28 16Jun10 |
| Goat's beard (Tragopogon dubius) |
16Jul01 |
| Goutweed (Aegopodium podagraria) | |
| Greenbrier, common | 23Oct20 |
| Green kyllinga | 21Sep03 |
| Ground ivy (Glechoma microcarpa) | 23May12 20May22, 20May15 19Jul19 |
| Groundsel, common | 23Oct27 19Jun28 |
| Hemp dogbane | 18Aug24 |
| Henbit | |
| Herbicide, biological for nurseries and greenhouses | 21Oct01 |
| Herbicide damage | 22Jun03 |
| Herbicide drift | 20Sep04 |
| Herbicide efficacy | 21Jul09 (in heat) |
| Herbicide, impact of rain and temperature | 20Oct30 |
| Hog peanut | 16Sep16 |
| Hogweed, giant |
17Aug18, 17Jun09 |
| Horsenettle |
17Jun16 |
| Indian mock strawberry | 23May26 |
| Invasive plants - New MDA Tier 1 and Tier 2 plants | 20Sep04 16Apr29 |
| Iron, for weed control | 21Jul16, 21Jul02, 21Jun25 |
| Ironweed, New York (a native plant) | 18Oct05 |
| Italian arum | 17Mar17 |
| Japanese hops (Humulus japonicas) | 18Jul06 |
| Jewelweed (Impatiens capensis), native, but reseeds well and can be a problem in some situations | 16Jul22 |
| Jimsonweed | 20Jul31 |
| Johnsongrass | 20Sep18 19Oct18 18Aug17 |
| Knotweed, Japanese | 19Aug23 16Jun17 |
| Kyllinga, green | 18Nov02, 18Sep21 |
| Lady's thumb |
17May26 |
| Lespedeza, common (Kummerowia striata (syn. Lespedeza striata) | 19Aug30 16Oct28 |
| Lesser celandine |
19Apr26 |
| Lettuce, prickly (Latuca scariola) | 19May24 18Aug31 |
| Marestail (horseweed) | 22May27 17Jun30 |
| Mile-a-minute weed | 20Aug21 16Aug12 |
| Mistletoe | 22Oct21 |
| Morning glory, ivyleaf | |
| Morning glory, tall | 19Sep20 |
| Mugwort | 21Jul02, 21Jun25 17Jul28 |
| Mulberry weed (aka hairy crabweed) | 19Aug09 |
| Mullein, common | 20Jul10 |
| Mustard, garlic | |
| Mustard, hedge | 23Jun02 22Jul22 |
| Nettle, European stinging | 18May04 |
| Nightshade, bittersweet (Solanum dulcamara) |
16Jul15 |
| Nimblewill | 23Jul21 22Jul29 21Sep17 |
| Nutsedge, yellow |
23May19 16Sep23 (photo of nutlets) |
| Panicum, fall |
18Aug17 |
| Pear, callery (aka Bradford) | 21Oct08 19Apr12 |
| Pineapple weed | 21May21 |
| Plantain (Plantago sp.) | 22Oct28 |
| Pokeweed | 22May06 20Oct16 17Aug04 |
| Poison hemlock | |
| Poison ivy | 22Aug26 |
| Porcelain berry | 23Oct13, 23Oct06, 23Sep29 |
| Purslane, common | 23Aug11 |
| Queen Anne's Lace (Daucus carota) | 18Jun22 |
| Ragweed, common | 23Sep22 17Oct13 |
| Rose, multiflora | 18Oct26 |
| Shepherd's purse (Capsella bursa-pastoris) |
19May17 |
| Smartweed, Pennsylvania | 20Jul17 |
| Sowthistle, perennial (Sonchus arvensis) | 23Oct13 |
| Speedwell, common (Veronica officinalis) | 17Apr14 |
| Speedwell, Persian (Veronica persica) | 17Apr21 |
| Spurge, prostrate | 17Sep15 |
| Spurge, Japanese | 19Apr12 |
| Spurge, spotted | 23Aug25 21Jul02 16Aug19 |
| Star-of-Bethlehem (Ornithogalum umbellatum) | 23May05 20May08 18Apr13 |
| Stiltgrass, Japanese |
22Apr15 (germination) |
| Stork's bill, common (Erodium cicutarium) | 20May01 |
| Teasel, common | 23Sep15 |
| Thistle, Canada |
16Sep30 (infected by bacteria) |
| Thistle, musk | 22Jun17 |
| Thistle, tall (Cirsium altissimum) | 16Jun03 |
| Thoroughwort pennycress | 17Jun23 |
| Timothy (Phleum pretense) | 16May13 |
| Tree of heaven (Ailanthus altissima) | 20Sep04 18Jul27 |
| Velvetleaf | 23Aug04 20Aug14 |
| Vernonia novaboracensis (New York ironweed), a native plant that can be a problem in some sites. | 22Sep30 |
| Violets, wild | 16May06 |
| Virginia creeper | 23Sep29 22Sep02 18Jul20 |
| Weeds, in spring | 22Apr01 |
| Weed control challenges: timing, soil moisture | 16Sep02 |
| Weed control: management practices | 19Sep06 (in turf) |
| Weed control: soil temperatures | 16Mar25 |
| Wild carrot | 23Jun09 21Jul23 |
| Wineberry (Rubus phoenicolasius) | 20Oct09 19Jun21 16Nov04 |
| Witchgrass (Panicum capillare) | 16Jul29 |
| Woodsorrel, yellow | 22Jun03 21Oct22 19Oct04 |
| Yarrow, common | 20Jun19 17Aug11 |