Related by context. Frequent words. (Click for all words.) 60 mealybugs 60 ragwort 58 Japanese knotweed 58 Phytophthora 58 fireweed 57 whitefly 56 invasive weed 56 spider mites 56 pests 56 Scotch broom 55 downy mildew 55 knotweed 55 whiteflies 54 bollworm 54 spotted knapweed 54 insect pest 54 knapweed 54 aphids 53 fungus 53 bindweed 53 anthracnose 53 vetch 53 Eurasian milfoil 52 loosestrife 52 weevils 52 purple loosestrife 52 nematodes 52 Aphids 52 insect pests 52 leafy spurge 52 giant hogweed 52 nematode 52 bracken 51 varroa 51 invasive weeds 51 aphid 51 chickweed 51 weevil 51 powdery mildew 51 fungal disease 51 borers 51 insect 51 cutworms 50 noxious weed 50 horsetail 50 Fungicides 50 fireblight 50 Fungal 50 spp 50 water hyacinth 50 beetle 50 Argentine ants 50 rootworm 50 hyacinth 50 chinch bugs 50 barberry 49 thistles 49 boll weevils 49 Cane toads 49 pest 49 thistle 49 eucalypts 49 brassicas 49 invasive pests 49 Bacillus thuringiensis 49 aquatic weeds 49 insecticidal 49 weeds 49 root rot 49 fungal 49 broadleaf weeds 49 potato blight 48 beetles 48 pampas grass 48 infestations 48 invasives 48 insect infestations 48 tamarisk 48 varroa mite 48 Herbicides 48 psyllids 48 infestation 48 tussock 48 invasive pest 48 European corn borer 47 Hydrilla 47 Asian longhorned beetle 47 shrubby 47 insects 47 parasitic wasps 47 agapanthus 47 lantana 47 Brassica 47 phylloxera 47 dieback 47 leaf rust 47 invasive species 47 biocontrol 47 crabgrass 47 resistant varieties 47 borer