Related by context. Frequent words. (Click for all words.) 67 adelgid 66 hemlock woolly adelgid 64 hemlock trees 62 gypsy moth caterpillars 60 beetle infestation 60 beetles 59 hemlocks 58 ash borer 58 gypsy moths 57 Asian longhorned beetle 57 mountain pine beetles 56 bark beetles 56 Infestations 56 purple loosestrife 55 fungus 55 beetle 55 bark beetle 55 Feral hogs 54 phragmites 54 oak wilt 54 invasives 54 invasive pests 54 pine beetles 54 defoliate 54 emerald ash borers 54 gypsy moth 54 borers 54 leafy spurge 53 hardwood forests 53 defoliated 53 Sudden Oak 53 invasive weed 53 Emerald Ash Borer 52 woody plants 52 red cockaded woodpecker 52 insect pests 52 insects 52 carpenter ants 52 insect infestations 52 insect pest 52 fungal disease 52 hardwood trees 52 spider mites 52 invasive weeds 52 Eurasian milfoil 52 invasive species 52 knotweed 51 armyworms 51 whiteflies 51 grassland birds 51 invasive pest 51 chiggers 51 pests 51 emerald ash borer 51 garlic mustard 51 freshwater mussels 51 stink bugs 51 whitefly 51 knapweed 50 Herbicides 50 Aphids 50 anthracnose 50 forbs 50 Phytophthora 50 caterpillars 50 feral pigs 50 cutworms 50 infestations 50 giant hogweed 50 aquatic weeds 50 tamarisk 50 federally endangered 50 insect populations 50 pine plantations 50 ash trees 50 noxious weed 50 psyllids 49 soybean aphid 49 Invasive species 49 salt cedar 49 Japanese knotweed 49 borer 49 fireweed 49 kudzu 49 gray squirrels 49 psyllid 49 copperheads 49 understory 49 insect 49 parasitic wasps 49 cheatgrass 49 Argentine ants 49 walnut trees 48 Soybean rust 48 Poison ivy 48 wild hogs 48 fungal spores 48 root rot 48 chytrid fungus 48 species 48 pine beetle