Related by context. Frequent words. (Click for all words.) 75 pine beetle 75 bark beetles 74 mountain pine beetle 65 beetle 59 gypsy moth 59 aspen 58 gypsy moths 57 wildfires 57 beetles 56 emerald ash borer 55 noxious weeds 55 noxious weed 55 wildland fires 54 fungal disease 54 insect pests 54 hemlocks 53 invasive species 53 wildland fire 53 conifer 53 forest fires 53 fungus 52 Forest Service 52 conifers 52 Dutch elm disease 51 aphid 51 ash trees 51 insect 51 wildfire 51 infestation 50 pests 49 infestations 49 pest 49 rangeland 49 prescribed burns 49 prairie dog 48 powdery mildew 48 forests 48 spruce trees 48 deer herd 48 prairie dogs 48 poison ivy 48 cottonwood 48 aphids 48 pathogen 48 nematode 48 locust 47 milfoil 47 pine trees 47 mountain lion 47 moth 47 caterpillars 47 mosquito populations 47 elk 46 mountain lions 46 nose syndrome 46 feral hogs 46 bighorns 46 insects 46 vegetation 46 foresters 46 canker 46 lichen 46 wildland 46 bee colonies 46 Douglas fir 45 sagebrush 45 cottonwoods 45 elms 45 honeybees 45 forester 45 grasshoppers 45 nematodes 45 chaparral 45 West Nile virus 44 mule deer 44 hantavirus 44 fir trees 44 honeybee 44 forest 44 weevil 44 prolonged drought 44 Lake Tahoe Basin 44 lupine 44 West Nile Virus 44 ragweed 44 grasses 43 bighorn sheep 43 trees 43 mesquite 43 timber harvest 43 Forests 43 hemlock 43 fungi 43 borer 43 juniper 43 wasp 43 rhododendron 43 hydrilla 43 pine forests 43 beneficial insects 43 rangelands