#4 I am . . .Phytophthora cinnamomi

Phytophthora root rotI like hiking in the woods. I’ll infect over 100 hosts, including azalea, rhododendron, camellia, boxwood, eucalyptus, avocado, pine, juniper, hemlock, spruce, fir, cedar, and cypress (not picky).I like the rain – it creates the wet soils thatI love.

#2 I am . . .Phytophthora ramorum

Sudden oak death and ramorum blight- I am an oomycete. I like “hiking” in the woods of northern California and Oregon.- I like flying kites (spores are spread by wind and rain)- I'm not a picky eater (host range includes > 100 species of trees shrubs andornamentals)

Image: APSnet

#3 I am . . .Cryphonectria parasitica

Chestnut blightI’m a fungus, and American chestnut is my favorite host (I’m kinda picky) – and I’ve done a good job of wiping out chestnut trees in North America. I do like the rain – rain and wind help to spread my spores.

#5 I am . . .Boletus edulis

#6 I am . . .Armillaria mellea

Bolete, porcini, king bolete mushroom, penny cap

I am a basidiomycete fungus. I like hiking in the woods, where I’m usually found in an ectomycorrhizal association with pines. I am an edible mushroom, quite popular in many recipes. I can grow to be quite large!

Armillaria root disease, shoestring root rotI am a soil-borne fungus that infects a wide host range of trees, vines and woody species. I cause a white rot of wood and I produce “honey mushrooms” at the base of trees.

Photo: Linda Haugen, USDA Forest Service, Bugwood.org

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APS Image Resources

Photo: Joseph O'Brien, USDA Forest Service, Bugwood.org

#1 I am . . .Cronartium ribicolaWhite pine blister rust- I’m kinda picky! I require 2 hosts - white pines (why I like hiking in the woods) and Ribes (currants and gooseberries) – to complete my life cycle.

- Windy kite-flying weather helps me spread my aeciospores.

Photo: Joseph O'Brien, USDA Forest Service, Bugwood.org

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#7 I am . . .Mycosphaerella fijiensis

#10 I am . . .Ralstonia solanacearum

#8 I am . . .Lasiodiplodia theobromae

#9 I am . . .Hemileia vastatrix

#11 I am . . .Heterodera spp.

#12 I am . . .Meloidogyne spp.

Rot and DiebackI love the tropics, but I'm not a picky eater - I cause rotting and dieback in grapes, citrus, and about 500 host plants. I’ve even been known to infect a human toenail or two!

Black sigatoka of banana, black leaf streakI’m a fungus, and I’m partial to the tropics. A nice wet, windy day will help me spread my spores.

I’m pretty picky – banana is my fav food - especially Cavendish, the world’s major commercial variety.

Coffee rustI’m found in the tropics, or wherever coffee is grown. You could say I'm a picky eater - I literally live on coffee.

Photo: APS Education Canter – Plant Disease Lesson – Coffee rust

Brown rot of potato, bacterial wilt of solanaceous plants & some ornamentals,Moko disease of banana

I am a bacterial pathogen and I can infect hundreds of plant species (I’m not picky)! I can be found in tropical, sub-tropical & some temperate regions.

Cyst nematode

I am a plant parasitic nematode (simple roundworm). The different Heterodera species each tend to feed on and infect the roots of specific plants (digging in the dirt) – e.g., soybean cyst nematode and soybean, potato cyst nematode and potato.

Root knot nematode

I am a plant parasitic nematode, and I must admit I cause a lot of damage to agricultural crops world-wide. I like digging in the dirt . . . I've been known to feed on the roots nearly 2000 different plants (definitely not picky!)

Photo: Gerald Holmes, Cal Poly SLO, bugwood.org

Photo: Soybean cyst nematode and egg (USDA ARS)Photo: Plant Protection Service, Bugwood.org

Meloidogyneincognita

Photo: USDA ARS

Photo: Gerald Holmes, Cal Poly SLO, Bugwood.org

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#13 I am . . .Guignardia bidwellii

#16 I am . . .Botrytis cinerea

#14 I am . . .Alternaria alternata

#15 I am . . .Magnaporthe oryzae

#17 I am . . .Phytophthora infestans

#18 I am . . .Agrobacterium tumefaciens

Spots, rots and blightsBlack rot of grapeMy name describes me well. I’m an important fungal disease of grapes, and there’s nothing like a wet, windy day to help me spread my spores.

Photo: Wikipedia

Gray mold or Botrytis bunch rot

I am a fungus that infects many plants – grapes, geraniums, strawberries, tomatoes, onions, garlic and more (I’m not picky). Wet, humid conditions help me thrive. Under certain conditions, I can infect grapes to produce a sweet, Botrytized wine (Noble rot).

Crown gallI am a bacterial pathogen, commonly found in the soil (digging in the dirt), where I infect the roots of grapes, many fruit and nut trees and dozens of other plant species (not a picky eater!)

Late blight of potato and tomatoI am the pathogen associated with the Irish potato famine. If you like digging in the dirt, you may find me infecting my favorite food, potato tubers (I’m kinda picky).

Photo: Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org

I’m a fungus that can infect hundreds of plants, including citrus and papaya. I’m also associated with lung infections and mold allergies (I’m not picky!) I can be found in the air and my spores are spread in kite-flying weather.

Rice blastI’m one of the most important and devastating diseases worldwide. I am a fungus that infects rice (pretty picky eater). I thrive under warm, wet and humid conditions.

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Photo: University of Georgia Plant Pathology Archive, Bugwood.org

Photo: University of Georgia Plant Pathology Archive, Bugwood.org

I am nature’s genetic engineer, and I can also be quite useful in the lab!

Photo: Wikipedia

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#19 I am . . .Maize lethal necrosis

#22 I am . . .Tomato spotted wilt virus (TSWV)

#20 I am . . .Candidatus Phytoplasma asteris

#21 I am . . .Pantoea stewartii

#23 I am . . .Sudden Death Syndrome of Soybean

#24 I am . . .Xiphinema americanum

Aster yellows

I am a phytoplasma associated with hundreds of species, many in the Aster family but also crops such as wheat and barley (I’m not picky).

I am vectored by leafhoppers (we work as part of a team). I usually infect above ground plant parts (I like fresh air).

I like to work as part of a team: maize lethal necrosis is a complex of the Maize Chlorotic Mottle Virus, and potyviruses infecting cereals. I am vectored by insects such as thrips.

I infect mainly corn (aboveground plant parts) and I’m causing devastating farm losses inWest Africa.

(Erwinia stewartii)Stewart’s wilt of corn

Dagger nematodeI am one of the most important plant parasitic nematodes in agriculture. I’m found in the soil and I’ll eat corn and soybean, virtually all fruits, conifers, grasses, ornamentals and more (not a picky eater).

I like to work aspart of a team:I’m a vector ofTomato ringspotvirus and otherviruses.

I am a soil-borne disease of soybean. I do my most destructive work as part of a team: Fusarium virguliforme (fungus) and Heterodera glycines (soybean cyst nematode) interact to cause severe damage.

I am a bacterial pathogen I I’m vectored by the corn flea beetle (we work as part of a team).

I’m kind of picky; I especially like sweet corn!

I infect over 1000 species, including many vegetables, peanut and tobacco (I’m not a picky eater). I am vectored by thrips (we work as a team).

TSWV symptoms on tomato. Photo: William M. Brown Jr., Bugwood.org

Photo: Daren Mueller, Iowa State University, Bugwood.org

Photo: Aster yellows symptoms on immature onion. Lindsay du Toit, Washington State Univ., Bugwood.org

Photo: Felix Francis, University of Delaware, Bugwood.org

Photo: FAO

Photo: Horacio Lopez Nicora

#25 I am . . .Puccinia graminis

#28 I am . . .Xylella fastidiosa

#26 I am . . .Raffaelea lauricola

#27 I am . . .Sclerotiniahomoeocarpa

#29 I am . . .Fusarium oxysporum

#30 I am . . .Rhizoctonia solani

Laurel wiltLaurel wilt is a fungus disease of the laurel family – redbay, sassafras etc., but avocados may be my most well-known host. I am spread by the redbay ambrosia beetle (we work as a team).

Rhizoctonia damping-off, blight and rotI am a soil-borne fungus found around the world. I’m not a picky eater (I have a broad host range – turfgrass, potatoes, cereals, sugarbeet, cucumber, rice). I like to work as part of a team (R. solani is common in root rot complexes).

Fusarium wiltI am found in soils worldwide, often part of a root rot complex and/or assoc. with nematodes (team player). Although I’m diverse, formae speciales (based on host plant) generally have a limited host range, e.g.- F. oxysporum f. sp. lycopersici causes vascular wilt in tomato.

Dollar spot of turfgrassI’m kind of picky (I’m mainly a turfgrass disease). I love the scent of rain (wetness and moisture help me thrive!)I like to work as part of a team - it’s my love of sports! I can be found on golf courses and athletic fields in many parts of the world.

Stem rust

I am a fungal disease of wheat and barley. Throughout history, I have been a threat to the world supply of wheat, although farmers now grow disease-resistant varieties. Wheat and an alternate host, barberry, help me complete my complex life cycle (but I can survive on wheat alone). My windborne spores like to travel the world.

Photo: Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org

Photo: Barb Corwin, Turfgrass Diagnostics, Bugwood.org

I am thought to be native to Asia, now I’m also in the southeast US (world traveler)Photo: Laurel wilt on redbay, Ronald F. Billings, Texas Forest Service, Bugwood.org

Symptoms on tomato

Photo: Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org

I am a bacterial pathogen and I’m creating news headlines around the world: Olive Quick Decline Syndrome in Italy, Pierce’s disease in grapes, Citrus variegated chlorisis in Brazil, phoney peach disease in the U.S. and bacterial leaf scorches in many trees. I am spread by leafhoppers (we work as a team).

Photo: scorch symtptom, John Hartman, Univ of Kentucky, Bugwood.org

Photo: USDA ARS

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