Related by context. Frequent words. (Click for all words.) 69 knapweed 68 leafy spurge 67 invasive weed 66 noxious weed 65 noxious weeds 64 purple loosestrife 64 salt cedar 64 cheatgrass 64 tamarisk 64 whiteflies 64 invasive weeds 63 forbs 62 whitefly 62 knotweed 62 invasives 61 Japanese knotweed 61 beetles 61 adelgid 61 weevils 61 gypsy moths 61 insect pest 60 phragmites 60 spider mites 60 fireweed 60 ragwort 59 pests 59 Invasive species 59 nematodes 59 weevil 59 hemlock woolly adelgid 59 invasive pest 59 garlic mustard 59 insect 59 gypsy moth 59 woody plants 59 bark beetle 59 invasive species 58 insect pests 58 biocontrol 58 psyllids 58 anthracnose 58 hemlock trees 58 Aphids 58 beetle 58 junipers 58 invasive pests 58 cutworms 58 buckthorn 57 chickweed 57 nematode 57 borers 57 aphids 57 garter snakes 57 infestations 57 insect infestations 57 soybean aphids 57 herbicides 56 giant hogweed 56 pigweed 56 aquatic weeds 56 nonnative species 56 sedge 56 grasses 56 insects 56 pest 56 conifers 56 weeds 56 Herbicides 56 tall fescue 55 broadleaf weeds 55 manzanita 55 lodgepole pine 55 aphid 55 bindweed 55 fungi 55 Poison ivy 55 fungus 55 glassy winged sharpshooter 55 beetle infestation 55 feral pigs 55 fungal disease 55 walnut trees 55 Zebra mussels 54 thistles 54 downy mildew 54 Bacillus thuringiensis 54 thrips 54 hardwood trees 54 infestation 54 bark beetles 54 milfoil 54 emerald ash borers 54 psyllid 54 insect populations 54 thistle 54 mountain pine beetles 54 species 54 grasshoppers 54 ryegrass 54 pyrethroids 54 lady beetles