Related by context. Frequent words. (Click for all words.) 69 giant hogweed 62 Japanese knotweed 59 ragwort 58 Infestations 58 Poison ivy 57 purple loosestrife 57 Emerald Ash Borer 57 knotweed 57 Hydrilla 56 invasive pest 56 loosestrife 56 invasive weed 56 Didymo 56 emerald ash borers 55 hemlock woolly adelgid 55 Asian longhorned beetle 55 poison ivy 54 Gypsy Moth 54 emerald ash borer 54 Fungal 54 hemlock trees 54 gypsy moths 54 noxious weed 54 Fungus 54 Scotch broom 54 spider mites 54 Scabies 54 anthracnose 53 ash borer 53 Superbugs 53 whiteflies 53 downy mildew 53 fungus 53 mealybugs 53 rock snot 53 Canker 52 Phytophthora 52 gypsy moth 52 Dandelions 52 Aphids 52 fireweed 52 Infested 52 E Coli 52 Pests 52 spotted knapweed 51 Bed Bugs 51 pests 51 adelgid 51 burdock 51 pampas grass 51 insect pest 51 didymo 51 whitefly 51 Sudden Oak 51 beetle 51 garlic mustard 51 Botanists 51 Infestation 51 Invasive Species 50 Eurasian milfoil 50 insect 50 vetch 50 phragmites 50 fungal disease 50 invasive weeds 50 Eurasian watermilfoil 50 Invasive 50 deciduous tree 50 buckthorn 50 bluebell 50 infestation 50 infestations 50 stink bug 50 invasive species 50 duckweed 50 invasives 49 Euphorbia 49 Ragweed 49 rhododendron 49 Mildew 49 privet 49 berry bushes 49 Mountain Pine Beetle 49 E.Coli 49 Sedum 49 fungi 49 borer 49 barberry 49 Soybean rust 49 fiddleheads 48 poison oak 48 beetles 48 psyllids 48 allium 48 psyllid 48 weevil 48 tiger mosquito 48 woody plants 48 horsetail 48 knapweed 48 invasive pests