Related by context. Frequent words. (Click for all words.) 67 purple loosestrife 65 gypsy moth 64 gypsy moths 64 Emerald Ash Borer 64 emerald ash borer 63 ash borer 63 noxious weed 62 spider mites 61 invasive weed 60 noxious weeds 60 invasives 60 poison ivy 59 ash trees 59 stink bug 59 infestation 59 pests 58 garlic mustard 58 infestations 58 aphids 58 root rot 58 invasive species 57 fungus 57 aphid 57 didymo 57 pest 57 beetle infestation 56 invasive weeds 56 stink bugs 56 beetle 56 caterpillars 55 buckthorn 55 hydrilla 55 powdery mildew 55 poison oak 55 insect 55 borers 55 dieback 55 milfoil 54 fungal disease 54 hemlocks 54 nematodes 54 weevils 54 insect pests 54 nematode 54 walnut trees 54 deer ticks 54 elm trees 53 beetles 53 pine beetle 53 elms 53 mites 53 feral pigs 53 bark beetle 53 woody plants 52 dandelions 52 fungi 52 insects 52 pine beetles 52 borer 52 Dutch elm disease 52 fungal diseases 52 mosquito populations 51 Invasive species 51 rhododendrons 51 weeds 51 zebra mussels 51 rhododendron 51 thistles 51 Chronic Wasting Disease 51 Invasive Species 51 defoliation 51 soybean rust 51 ornamental trees 51 insect infestations 51 camellias 51 conifers 50 crabgrass 50 weevil 50 wasp 50 overwintering 50 ragweed 50 EAB 50 weed seeds 50 wasps 50 crape myrtle 50 zebra mussel 50 biting insects 50 gray squirrels 50 trees 50 mosquito larvae 49 maples 49 junipers 49 bed bugs 49 shrubs 49 clematis 49 crocus 49 mosquitos 49 dandelion 49 defoliated 49 Zebra mussels 49 algal bloom