Weed Index 2019 - 2025 - Landscape and Nursery IPM Alert (links are set back to 2019)
| WEED | DATE OF REPORT |
|---|---|
| Arum, Italian (Arum italicum) | 24Mar22 |
| Bamboo (Phyllostachys aurea and P. aureosulcata) | 23Aug04 |
| Bedstraw, catchweed | 25May16 20Jun26 19Jun07 |
| Beefsteak plant (Perilla frutescens) | 25Jul18 20Sep11 19Nov01 |
| Bindweed, field | 24Oct04 21Jul16 20Jul24 |
| Bittercress, hairy | 25Mar28 24May10 21Mar12 20Apr03 19Apr05 18Apr20 |
| Bittersweet, Oriental | 23Aug25, 23Jun16 22Oct21 21Sep10 |
| Black medic | 24Jul26 |
| Bluegrass, annual and roughstalk | 25May02 24May03 (roughstalk) 22Jul15 (annual), 22May13 (roughstalk) 21Aug27 (annual), 21Apr30 (roughstalk) 20Apr24 19May10 18Apr27 |
| Burnweed, American | 25Oct10 18Sep14 |
| Buttercup, bulbosus (Ranunculus bulbosus) | 22Apr15 21May07 |
| Buttonweed, Virginia | 20Oct02 |
| Carpetgrass, small (Arthraxon hispidus) | 25Aug22 24Sep27 22Aug12 19Jul12 |
| Carrot, wild | 22Sep09 |
| Chameleon plant | 21Jun18 |
| Chickweed, common | 25Oct31 23Mar31 20Apr17 |
| Cocklebur, common | 24Oct25 |
| Cogongrass | 24May17 |
| Cow parsnip | 22Apr22 |
| Crabgrass | 25May30 23Apr21 22Apr29 20Apr10 (control) |
| Curly dock | 23Oct06 |
| Dayflower, Asiatic | 24Aug09 |
| Deadnettle, purple | 24Mar29 23Nov03 20May15 |
| Dodder | 25Aug29 20Aug21 19Jul26 |
| Dogbane, hemp | 25Jun06 22Jul08 |
| Fall germinating weeds | 24Aug16 22Aug05 |
| Foxtail, giant | 25Sep19 21Oct08 19Sep26 |
| Foxtail, yellow | 25Aug15 23Jun30 |
| Fumewort, incised | 24Mar22 |
| Garlic, wild | 20Oct23 |
| Goat's beard (Tragopogon dubius) | 25Jun27 18Jul13 |
| Goosegrass | 25Jun20 24Aug02 |
| Goutweed (Aegopodium podagraria) | 24May24 21Apr23 18May11 |
| Greenbrier, common | 23Oct20 |
| Green kyllinga | 21Sep03 |
| Ground ivy (Glechoma microcarpa) | 23May12 20May22, 20May15 19Jul19 |
| Groundsel, common | 23Oct27 19Jun28 |
| Hemp dogbane | 18Aug24 |
| Henbit (Lamium amplexicaule) | 24Apr05 23Mar24 20May29, 20May15 |
| 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 |
| Hogweed, giant | 18Jun22 |
| Horsenettle | 24May31 23Jul14 19Jun14 |
| Indian mock strawberry | 23May26 |
| Invasive plants - New MDA Tier 1 and Tier 2 plants | 24Jun21 (changes to law) 20Sep04 |
| Iron, for weed control | 21Jul16, 21Jul02, 21Jun25 |
| Ironweed, New York (a native plant) | 18Oct05 |
| Japanese hops (Humulus japonicas) | 18Jul06 |
| Jimsonweed | 20Jul31 |
| Johnsongrass | 24Jun28 20Sep18 19Oct18 18Aug17 |
| Knotweed, Japanese | 24Oct11 19Aug23 |
| Knotweed, prostrate | 25Jul25 |
| Kyllinga, green | 18Nov02, 18Sep21 |
| Lady's thumb | 23Jun23 22Oct14 18Jun15 |
| Lespedeza, annual | 24Aug30 |
| Lespedeza, common (Kummerowia striata (syn. Lespedeza striata) | 19Aug30 |
| Lesser celandine | 22Apr08 21Mar12 19Apr26 18Apr06 |
| Lettuce, prickly (Latuca scariola) | 19May24 18Aug31 |
| Marestail (horseweed) | 24Sep13 (vs ID of goldenrod) 22May27 |
| Mile-a-minute weed | 25Jul11 20Aug21 |
| Mistletoe | 22Oct21 |
| Morning glory, ivyleaf | 23Sep01 18Sep07 |
| Morning glory, tall | 24Jul19 19Sep20 |
| Mugwort | 21Jul02, 21Jun25 |
| Mulberry weed (aka hairy crabweed) | 19Aug09 |
| Mullein, common | 20Jul10 |
| Mustard, garlic | 25Apr25 24Apr26 23Apr14 21May14 19May03 18May18 |
| Mustard, hedge | 23Jun02 22Jul22 |
| Nettle, European stinging | 18May04 |
| Nightshade, bittersweet (Solanum dulcamara) | 23Jul28 18Jun01 |
| Nimblewill | 23Jul21 22Jul29 21Sep17 |
| Nutsedge, yellow | 24Aug23 23May19 22May20 21Oct01 18May25 |
| Panicum, fall | 19Oct25 18Aug17 |
| Pear, callery (aka Bradford) | 21Oct08 19Apr12 |
| Pennisetum spreading in turf | 25Sep12 |
| Pineapple weed | 24Jun21 21May21 |
| Plantain, broadleaf and buckhorn Plantain (Plantago sp.) | 25May23 22Oct28 |
| Pokeweed | 25Jun13 24Jul12 22May06 20Oct16 |
| Poison hemlock | 25Apr18 23Apr07 18Jun22 |
| Poison ivy | 22Aug26 |
| Porcelain berry | 23Oct13, 23Oct06, 23Sep29 |
| Purslane, common | 23Aug11 |
| Queen Anne's Lace (Daucus carota) | 25Sep26 18Jun22 |
| Ragweed, common | 25Aug08 23Sep22 |
| Rose, multiflora | 18Oct26 |
| Seedheads (Canada thistle, giant foxtail, common ragweed, velvetleaf, dandelion, common purslane, redroot ragweed, large crabgrass, common mullein) | 25Sep12 |
| Shepherd's purse (Capsella bursa-pastoris) | 23Sep08 21Apr16 19May17 |
| Smartweed, Pennsylvania | 20Jul17 |
| Sowthistle, perennial (Sonchus arvensis) | 23Oct13 |
| Spurge, Japanese | 19Apr12 |
| Spurge, spotted | 23Aug25 21Jul02 |
| Star-of-Bethlehem (Ornithogalum umbellatum) | 23May05 20May08 18Apr13 |
| Stiltgrass, Japanese | 24Sep06, 24Apr19 23Mar17 22Apr15 (germination) 21Apr16 20Aug07, 20Jun05 19Aug02 |
| Stork's bill, common (Erodium cicutarium) | 20May01 |
| Teasel, common | 23Sep15 |
| Thistle, Canada | 25May09 24Jun14 22Jun24 21May28 |
| Thistle, musk | 22Jun17 |
| Tree of heaven (Ailanthus altissima) | 25Oct03 20Sep04 18Jul27 |
| Velvetleaf | 23Aug04 20Aug14 |
| Vernonia novaboracensis (New York ironweed), a native plant that can be a problem in some sites. | 22Sep30 |
| Virginia creeper | 25Sep05 23Sep29 22Sep02 18Jul20 |
| Weeds, in spring | 22Apr01 |
| Weed control challenges: timing, soil temperature | 25Apr04 |
| Weed control: management practices | 19Sep06 (in turf) |
| Wild carrot | 23Jun09 21Jul23 |
| Wineberry (Rubus phoenicolasius) | 20Oct09 19Jun21 |
| Winter, weed growth | 24Feb21 |
| Woodsorrel, yellow | 25Oct24 22Jun03 21Oct22 19Oct04 |
| Yarrow, common | 20Jun19 |
| Yellowrocket (Barbarea vulgaris) | 25Apr11 24Apr12 |