Related by context. Frequent words. (Click for all words.) 70 mountain pine beetles 68 bark beetle 68 pine beetles 66 beetle infestation 66 bark beetles 64 pine beetle 64 bark beetle infestation 63 pine beetle infestation 63 mountain pine beetle 63 Mountain Pine Beetle 61 lodgepole pine 60 insect infestations 60 oak wilt 59 fungal disease 58 hemlock trees 58 adelgid 57 lodgepole pines 57 Sudden Oak 56 hemlock woolly adelgid 56 hemlocks 55 fungus 55 fireweed 55 gypsy moth 55 Feral hogs 55 beetle 55 insect infestation 55 gypsy moths 54 Phytophthora 54 insect pest 54 invasive weed 54 cheatgrass 54 insect pests 54 whitefly 54 invasive weeds 53 beetles 53 pests 53 leafy spurge 53 armyworms 53 chytrid fungus 53 anthracnose 53 salt cedar 53 catastrophic wildfires 53 ponderosa pines 53 tamarisk 52 knapweed 52 potato blight 52 Asian longhorned beetle 52 wildfires 52 grassland birds 52 fungal diseases 52 aspen trees 52 soybean aphids 51 pine forests 51 feral pigs 51 purple loosestrife 51 stripe rust 51 emerald ash borers 51 invasives 51 defoliation 51 root rot 51 aspen 51 woody plants 51 varroa mite 51 phragmites 51 whiteflies 51 Japanese knotweed 51 veld fires 51 invasive species 51 pest 51 locust plague 51 hardwood trees 50 bollworm 50 noxious weed 50 Canker 50 forest fires 50 downy mildew 50 boll weevil 50 insect 50 Severe drought 50 vegetation 50 infestations 50 insect populations 50 aphid 50 defoliated 50 whitebark pine 50 invasive pests 50 invasive pest 50 Dutch elm disease 50 conifers 50 fungal spores 50 infestation 50 forbs 49 Soybean rust 49 Aphids 49 dieback 49 borers 49 phylloxera 49 Invasive species 49 ash borer 49 rangeland 49 emerald ash borer