Related by context. Frequent words. (Click for all words.) 62 Dutch elm disease 60 elm trees 59 beetle infestation 58 elms 58 fungal disease 56 insect pest 55 bark beetle 54 beetle 54 gypsy moth 54 gypsy moths 54 knotweed 53 mountain pine beetles 53 ash borer 52 beetles 52 Hantavirus 52 Japanese knotweed 52 infestation 52 infestations 52 fungus 51 pine beetles 51 Emerald Ash Borer 51 Pests 51 ash trees 51 pests 51 elm 51 disease 51 emerald ash borer 51 varroa mite 50 invasive weed 50 insect infestation 50 noxious weed 50 Asian longhorned beetle 50 root rot 49 beech trees 49 Aphids 49 insect 49 invasives 49 Disease 49 purple loosestrife 49 buckthorn 48 horse chestnut 48 dieback 48 lodgepole pines 48 aphid 48 invasive species 48 psyllid 47 Invasive species 47 defoliated 47 tick borne diseases 47 insect infestations 47 salt cedar 47 Soybean rust 47 defoliation 46 poplars 46 pest 46 spider mites 46 trees 46 walnut trees 46 weevil 46 insect pests 46 bark beetles 46 knapweed 46 chestnut trees 46 bee populations 46 armyworms 46 phragmites 46 hemlocks 46 viburnum 46 stem rust 46 junipers 46 citrus greening 46 invasive weeds 46 conifer 46 noxious weeds 45 mosquito borne 45 mosquito borne virus 45 citrus canker 45 chestnut tree 45 blight 45 feral pigs 45 canker 45 pine beetle 45 mosquito populations 45 conifers 45 Whooping Cough 45 stink bug 45 mites 45 Encephalitis 45 arborvitae 44 aphids 44 hardwood trees 44 powdery mildew 44 Lyme disease 44 woody plants 44 parasitic disease 44 mosquito borne illness 44 elm tree 44 birches 44 Reforestation 44 West Nile encephalitis 44 crape myrtle