Related by context. Frequent words. (Click for all words.) 64 invasive weed 64 cheatgrass 63 tamarisk 62 buckthorn 62 noxious weeds 61 purple loosestrife 61 invasive weeds 59 garlic mustard 58 gypsy moths 57 noxious weed 57 spider mites 57 phragmites 57 aphid 56 pine beetles 56 invasives 56 understory 56 nematodes 56 bark beetle 56 beetle 56 aphids 55 gypsy moth 55 weevils 55 lodgepole pine 54 woody plants 54 weevil 54 invasive species 54 beetles 54 thistle 54 thistles 54 nematode 53 powdery mildew 53 milfoil 53 ryegrass 53 insect pests 53 clover 53 borers 52 ash borer 52 infestations 52 insect infestations 52 beetle infestation 52 insect 51 milkweed 51 conifers 51 fungal disease 51 fungus 51 weeds 51 beneficial insects 51 bark beetles 51 pests 51 junipers 51 sagebrush 51 prairie grasses 50 grasses 50 pine beetle 50 thrips 50 borer 50 mosquito populations 50 aspen 50 grasshoppers 50 cottonwoods 49 lantana 49 lupine 49 fungi 49 overwintering 49 zebra mussels 49 weed seeds 49 wasps 49 stem rust 49 infestation 49 groundcover 49 caterpillars 49 hemlocks 49 ladybugs 49 crabgrass 49 emerald ash borer 49 bumblebees 48 ragweed 48 prairie grass 48 poison ivy 48 stink bug 48 insects 48 root rot 48 phlox 48 Zebra mussels 48 hydrilla 48 boreal forests 48 herbicides 48 wasp 48 mites 48 dandelion 47 fungal diseases 47 wildflowers 47 zebra mussel 47 resistant varieties 47 aspens 47 overwinter 47 lichen 47 dandelions 47 grassland 47 deer ticks 47 native grasses