Related by context. Frequent words. (Click for all words.) 59 woody plants 59 mullein 58 reed canary grass 58 endophytes 58 sapwood 57 mycorrhizal fungi 57 Poison ivy 56 Spider mites 56 pinyon 56 alkaline soils 56 pyrethrins 55 oak hickory 55 Phragmites 55 Spinosad 55 inoculants 55 endophyte 55 pondweed 55 mealy bugs 55 carbaryl 55 Giant Hogweed 55 Powdery mildew 55 spinosad 55 coniferous trees 55 Thrips 54 perennial herb 54 Milfoil 54 cambium 54 hemlock trees 54 P. ramorum 54 cucurbits 54 phloem 54 Phytophthora 54 nonchemical 54 Garlic mustard 54 cankers 54 bagworms 54 sooty mold 54 Invasive plants 54 Emerald ash borer 54 cabbage palms 54 heartwood 53 Gypsy moth 53 milky sap 53 spruce fir 53 mycelium 53 foliar diseases 53 tannic acid 53 biting midges 53 coniferous forests 53 hackberry 53 forbs 53 sweet clover 53 cogongrass 53 deciduous shrubs 53 wild parsnip 53 Mulches 53 urushiol 53 anthracnose 53 melaleuca 53 fungal spores 52 tansy 52 creeping bentgrass 52 hogweed 52 spider mite 52 bay laurel 52 manzanita 52 spotted knapweed 52 Imidacloprid 52 aquatic weed 52 flea beetles 52 mold fungi 52 shade tolerant 52 xylem 52 Nematodes 52 serviceberry 52 noninfectious 52 Bacillus thuringiensis 52 Hydrilla 52 frass 52 Japanese Knotweed 52 causative agents 51 adelgids 51 upland habitat 51 tall fescue 51 trichloroethene 51 barberry 51 poison ivy 51 unsprayed 51 herbicides insecticides 51 leaf beetle 51 ponderosa pine trees 51 oak wilt 51 leafhoppers 51 Trichloroethylene 51 tamarack 51 pasture grasses 51 Rotenone 51 sphagnum moss 51 tent caterpillars 51 horseweed 51 ash borers