Related by context. Frequent words. (Click for all words.) 72 fungal spores 67 spores 63 fruiting bodies 62 decaying vegetation 62 Stink bugs 61 funguses 61 Anthrax spores 60 moth larvae 60 fungus 60 bagworms 59 Dust mites 59 tent caterpillars 59 urushiol 59 bacteria 59 blowflies 59 fungi 59 pollen grains 59 sooty mold 59 naturally occurring bacteria 59 leafhoppers 59 fecal material 59 larval stages 58 stinkbugs 58 Spores 58 woody stems 58 infectious prions 58 pollens 58 Penicillium 58 mites 58 seedheads 58 sphagnum moss 58 larvae 58 phloem 58 inoculum 57 nasal secretions 57 flea beetles 57 insects 57 Asbestos fibers 57 mealy bugs 57 rotting vegetation 57 mouthparts 57 anaerobic bacteria 57 bacilli 57 mold spores 57 pollen 57 harmful microorganisms 57 nasal cavities 57 adelgids 57 aspergillus 56 parasitic worm 56 epiphytes 56 micro organism 56 toxins 56 weed seeds 56 mycelium 56 mycorrhizal fungi 56 cankers 56 trigger allergic reactions 56 tunicates 56 micro organisms 56 secretions 56 fatty tissues 56 Gypsy moths 56 egg sacs 55 parasitic worms 55 Bacterial infections 55 xylem 55 fungal pathogen 55 bacterial spores 55 Methylmercury 55 bacterium 55 whiteflies 55 varroa mites 55 pathogenic organisms 55 Migrating birds 55 airborne droplets 55 alkaline soils 55 ripening fruit 55 Aphids 55 Infestations 55 tannic acid 55 ash borers 55 Poison ivy 55 mealybugs 54 pest insects 54 dense canopy 54 harmful toxins 54 mold fungi 54 compost heaps 54 anthers 54 unpleasant smell 54 microorganisms 54 toxin 54 leaf litter 54 sucking insects 54 protozoan 54 Potted plants 54 seedpods 54 seeds germinate 54 pathogens 54 bacterial colonies