Related by context. Frequent words. (Click for all words.) 59 Spider mites 57 waterhemp 57 reed canary grass 57 deciduous forests 57 Invasive plants 56 pasture grasses 56 leafhoppers 55 nitrogen deposition 55 forbs 55 sweet clover 54 Garlic mustard 54 aphid populations 54 alkaline soils 53 wheat stubble 53 coniferous forests 53 teosinte 53 fescues 53 glyphosate resistant weeds 53 Ryegrass 53 vetch 53 spruce fir 53 tall fescue 53 glyphosate resistance 52 winter hardiness 52 shelterbelt 52 perennial grasses 52 foliar diseases 52 Palmer amaranth 52 conifer forests 52 sweetgum 52 perennial ryegrass 52 acidic soils 51 nutrient uptake 51 tillering 51 defoliating 51 pinyon 51 Gypsy moth 51 Gypsy moths 51 herbicide resistant crops 51 mealy bugs 51 Armyworms 51 mullein 51 hackberry 51 inoculants 50 anthracnose 50 leaf beetles 50 tree pollens 50 woody plants 50 glyphosate resistant 50 creeping bentgrass 50 corn borers 50 oak hickory 50 herbivory 50 brome 50 shade tolerant 50 adelgids 50 piñon 50 hickories 50 ocotillo 50 horseweed 50 saltbush 50 mycorrhizal fungi 50 milkweeds 50 woody vegetation 49 pine pollen 49 sawfly 49 cucurbits 49 temperate forests 49 endophytes 49 canadensis 49 tasseling 49 Phytophthora 49 native prairie grasses 49 plant physiologist 49 periodic droughts 49 corn earworm 49 mixed conifer 49 parasitic mites 49 temperate zones 49 leopard frogs 49 grasses 49 pink bollworm 49 herbaceous plants 49 bioenergy crops 49 nutrient runoff 49 Powdery mildew 49 marestail 49 rootworm 49 riparian forest 49 serviceberry 49 red maples 48 Aphid 48 alfalfa fields 48 Soil erosion 48 bollworms 48 sicken humans 48 unfertilized 48 hickory trees 48 unsprayed 48 Bermudagrass 48 Sclerotinia