Related by context. Frequent words. (Click for all words.) 63 spotted knapweed 60 invasive weeds 59 leafy spurge 58 saltcedar 58 loosestrife 58 Eurasian milfoil 58 vetch 58 Scotch broom 57 knapweed 57 tamarisk 56 noxious weed 56 woody plants 55 whiteflies 55 noxious weeds 55 spurge 55 lodgepole 55 buffelgrass 55 fireweed 54 salt cedar 54 evening primrose 54 foxtail 54 forbs 54 hemlock woolly adelgid 54 knotweed 54 nonnative plants 54 invasive weed 54 chickweed 54 cheatgrass 53 jack pine 53 aquatic weed 53 hackberry 53 junipers 53 purple loosestrife 52 weeds 52 understory 52 Hydrilla 52 buckthorn 52 hemlock trees 52 biocontrol 52 shrubby 52 adelgids 52 pampas grass 51 barberry 51 aquatic weeds 51 shrub 51 tall fescue 51 cottonwoods 51 horsetail 51 juniper 51 acacias 51 pigweed 51 nematodes 51 cutworms 51 grasses 50 adelgid 50 conifer trees 50 mealybugs 50 sagebrush 50 conifers 50 hickories 50 Crabgrass 50 cottonwood 50 garlic mustard 50 cattail 50 berry bushes 50 privet 50 herbaceous plants 50 Herbicides 50 liriope 50 grassland habitat 50 hemlocks 49 bluestem 49 Aphids 49 spider mites 49 Phytophthora 49 lantana 49 seedpods 49 phragmites 49 Sedum 49 thistles 49 groundcover 49 mesquite trees 49 Japanese knotweed 49 lodgepole pine 49 duckweed 49 invasives 49 Nematodes 49 willows 49 weed 49 Gypsy moths 49 cankers 49 Eurasian watermilfoil 49 invasive species 48 broadleaf weeds 48 Feral hogs 48 Rotenone 48 sedges 48 water hyacinth 48 weevils 48 nematode 48 viburnums