Related by context. Frequent words. (Click for all words.) 59 pest infestations 58 soil compaction 56 insect infestations 56 buffelgrass 56 invasive weeds 55 fireweed 55 ragwort 54 leafy spurge 54 noxious weeds 54 invasive pests 54 mealy bug 53 infestations 53 Fertilizing 53 chinch bugs 52 spotted knapweed 52 Phytophthora 52 soil erosion 52 pests 52 forbs 52 weeds 52 oak wilt 51 forage crops 51 invasive weed 51 whitefly 51 winterkill 51 vegetation 51 beetle infestation 51 pine beetle infestation 51 purple loosestrife 51 vetch 51 flystrike 51 pollinating insects 51 root rot 50 mosquito populations 50 insect populations 50 nonpoint source pollution 50 nutrient deficiency 50 Scotch broom 50 noxious weed 50 soybean aphid 50 pest infestation 50 nutrient deficiencies 50 spider mites 50 fungal diseases 50 corn borer 50 mosquito menace 50 sown crops 50 locust swarms 50 pesticide spraying 50 insect pest 50 lodgepole 49 insect pests 49 aquatic weeds 49 anthracnose 49 nematode 49 overwatering 49 beaver dams 49 leaf rust 49 Eurasian milfoil 49 larvicides 49 horticultural crops 49 nutrient runoff 49 bindweed 49 rodenticides 49 aquatic weed 49 crops 49 nonnative plants 49 areca 49 bracken 49 dieback 49 bark beetle 49 soybean aphids 49 feral pig 49 seed germination 49 spurge 49 weed seeds 49 knotweed 49 water hyacinth 49 Japanese knotweed 49 croplands 48 feral animals 48 conifer trees 48 overgrown vegetation 48 irrigated crops 48 pest 48 melting snowpack 48 grasshoppers 48 saturated soils 48 phragmites 48 defoliation 48 veld fires 48 downy mildew 48 herbicides 48 Sudden Oak 48 prunings 48 grassland birds 48 Aphids 48 grasses 48 pampas grass 48 powdery mildew 48 revegetate