Related by context. Frequent words. (Click for all words.) 70 mountain pine beetle 67 pine beetle 63 beetle 62 beetles 60 aspen 57 conifers 56 insect pests 56 hemlocks 55 fungus 54 gypsy moth 53 insects 53 gypsy moths 53 fungal disease 51 pests 51 fungi 51 insect 50 aspens 50 caterpillars 50 emerald ash borer 50 ash trees 49 wildfires 49 noxious weeds 49 nematodes 48 mosquito populations 48 forest fires 48 noxious weed 48 rangeland 47 grasshoppers 47 vegetation 47 invasive species 47 aphids 47 Douglas fir 47 tinder dry 47 spruce trees 46 conifer 46 weevils 46 cottonwoods 46 bighorns 46 aphid 46 grasses 46 pathogen 46 mites 46 chaparral 45 wildland fires 45 prairie dogs 45 sagebrush 45 nematode 45 honeybees 45 mosquitos 45 mosquitoes 45 spores 45 lichen 45 prescribed burns 45 pathogens 44 forests 44 pine trees 44 wildfire 44 wildland fire 44 infestations 44 bee colonies 44 Dutch elm disease 44 moths 44 prairie dog 44 moth 44 milfoil 43 hemlock 43 elk 43 wasps 43 fir trees 43 infestation 43 microbes 43 honey bees 43 pine forests 43 deciduous trees 43 bees 43 beneficial insects 43 prolonged drought 42 mosquito larvae 42 deer herd 42 voles 42 rangelands 42 bighorn sheep 42 trees 42 Forest Service 42 termites 42 cottonwood 42 citrus trees 42 pest 42 mesquite 41 micro organisms 41 grizzly bears 41 cacti 41 woodpeckers 41 nose syndrome 41 rodents 41 cattle grazing 41 powdery mildew 41 vernal pools 41 ants 41 wasp 41 sage grouse