#4 I am . . .Phytophthora cinnamomi

Phytophthora root rot

I 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 blight

I’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 rot

I 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 ribicola

White 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

Basidiomycota

Basidiomycota Basidiomycota

Ascomycota

Oomycota

Oomycota

#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 Dieback

I 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 streak

I’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 rust

I’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

Ascomycota Ascomycota Basidiomycota

#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 grape

My 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 gall

I 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 tomato

I 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 blast

I’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.

Photo: USDA ARS

AscomycotaAscomycota

Ascomycota

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

Ascomycota

Oomycota

#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 nematode

I 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 rot

I 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 wilt

I 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 turfgrass

I’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

Basidiomycota Ascomycota Ascomycota

Ascomycota Basidiomycota