Related by context. Frequent words. (Click for all words.) 74 bark beetles 70 pine beetle 70 mountain pine beetle 65 beetle 63 gypsy moth 61 ash borer 61 insect infestation 61 gypsy moths 60 beetles 59 fungus 58 infestation 58 emerald ash borer 58 aspen 58 fungal disease 57 hemlocks 57 defoliation 57 wildfires 56 forest fires 56 Emerald Ash Borer 56 ash trees 55 wildfire 55 cheatgrass 55 infestations 54 invasives 54 noxious weeds 53 root rot 53 noxious weed 53 invasive weeds 53 conifers 53 junipers 53 wildland fires 52 Dutch elm disease 52 mosquito populations 52 tinder dry 51 vegetation 51 insect 51 insect pests 51 aspens 51 wildland fire 51 conifer 50 Forest Service 50 brown apple moth 50 woody plants 50 prescribed burns 50 elm trees 50 invasive species 50 spruce trees 49 ponderosa pine 49 prolonged drought 49 pests 49 Douglas fir 49 hardwood trees 48 lichen 48 nose syndrome 48 pine trees 48 pine forests 48 pest 48 feral pigs 48 caterpillars 48 elms 47 forests 47 powdery mildew 47 wildland 47 poison ivy 47 fungi 47 aphid 47 Colony Collapse Disorder 47 deer herd 47 pathogen 46 chaparral 46 stink bugs 46 citrus canker 46 nematodes 46 prairie dog 46 moth 46 Forestry 46 hantavirus 46 nematode 46 trees 46 disease 46 insects 46 aphids 46 timber harvest 45 forest 45 borer 45 canker 45 juniper 45 woodlands 45 maples 45 brush fires 45 fires 45 herbicide 45 rangeland 45 West Nile virus 45 locust 45 defensible space 45 overgrazing 45 grasses 44 milfoil 44 foresters 44 pesticide