Related by context. Frequent words. (Click for all words.) 65 Didymo 60 Hydrilla 60 tunicates 60 ragwort 59 Japanese knotweed 59 hogweed 58 Invasive plants 58 aquatic weeds 57 didymo 57 rock snot 57 tent caterpillars 57 knotweed 56 salvinia 56 Phragmites 56 Milfoil 56 giant hogweed 55 Eurasian milfoil 55 water hyacinth 55 Eurasian watermilfoil 55 invasive weed 55 mealybug 54 cassowary 54 purple loosestrife 54 hyacinth 54 invasive aquatic 54 aquatic nuisance 53 invasive alien 53 platypuses 53 Phytophthora 53 aquatic weed 53 stoat 53 hemlock woolly adelgid 52 invasive weeds 52 flea beetles 52 mealybugs 52 parasitic worm 52 spartina 52 Scotch broom 52 leaf beetle 52 sea lampreys 52 Invasive species 52 hyacinths 52 salination 52 invasive insect 52 giant salvinia 51 invasive species 51 lorikeets 51 bagworms 51 echidnas 51 saltmarsh 50 fireweed 50 filter feeders 50 Varroa 50 varroa mite 50 stoats 50 Repellents 50 Cane toads 50 feral pig 50 loosestrife 50 Emerald ash borer 50 Stink bugs 50 oxalis 50 snakehead fish 50 gastropods 50 pest insects 50 Aphids 49 reed beds 49 invasive pest 49 ladybirds 49 agapanthus 49 zebra mussels 49 Quagga mussels 49 moth larvae 49 bees butterflies 49 Nematodes 49 freshwater mussels 49 phragmites 49 sooty mold 49 Zebra mussels 49 Soil erosion 49 feral animals 49 waterbirds 49 Natural Heritage SNH 49 melaleuca 49 whiteflies 49 Poison ivy 49 invasives 49 pests 49 adelgids 48 whitefly 48 mozzies 48 Flesh eating 48 leafhoppers 48 Otago Peninsula 48 insect larvae 48 Lionfish 48 chickweed 48 noxious weed 48 feral pigs 48 vetch 48 Invasive