Fungi Identification - Flashcards
Rhizopus rot strawberries
Rhizopus stolonifer
Rot of Peach
Rhizopus stolonifer
Wet rot of squash
Choanephora cucurbitarum
Pythium
Seed & seedling
Phytopthora
Seed & seedling
Gray Leaf Spot of Corn
Cercospora
Symptoms: long - rectangular, well-defined
Frogeye leaf spot of soybeans
Cercorspora
Symptoms: eyespots
Southern Rust of Corn
Orange, big
Wheat Stripe rust
Puccinia striform
yellow leaf stripe
Arranged in stripes
Northern corn leaf blight
Cigar lesions
Southern Corn leaf blight
Small lesions
Fusarium head blight or Fusium head scab of wheat
discolored half of the head
Produces vomitoxin
Sudden death syndrome
Yellow surrounding lesions
Septoria leaf blight
Small brown spots on leaves
Produces Pyendium - filled w/ asexual spores/conidia
Brown Stem rot
Stem - brown; looks like SDS
Fusarium stalk rot
Bottom - mycelium
Fusarium ear rot
Indicidual Kernels
Penicillium ear rot
Green/dark mold at top
Gray mold
Botrytis spp.
Post Harvest Diseases
Penicillium decay
Penicillium spp.
Post Harvest Diseases
Alternaria decay
Alternaria spp.
Post Harvest Diseases
Brown Rot
Moniliania fructicola
Post Harvest Diseases
Aspergillus rot
Aspergillus spp.
Post Harvest Diseases
Anthracnose Colletotrichum
Colletotrichum spp.
Post Harvest Diseases
Wheat Leaf Rust
Puccinia Triticinia
Small circular to oval shaped orange/red pustules leaf sheath to tip
Wheat Stem Rust
Puccinia gramminis fsp Triticinia
yellow to yellowish red or reddish pustules on leaves, sheath & stems
Tan Spot of Wheat
Pyrenophra trici - reprentis
Symptoms: tan lesions w/ yellow margin
Loose Smut of Wheat
Black powdery appearance of head
Ergot
Ergot sclerotia in wheat infloresence & mixed with Kernels
Cotton Rot
Cruciform branching of fungus hyphae
Apple Scab
Leaves and fruit
infects foliage
sexual reproduction
Soybean Downy mildew
on bottom on leaf
yellow spots on top
Corn Downy mildew
Crazy top
- by sclerophtera macrosprora
- shows up at tassel stage
Rose Powdery mildew
-
Powdery mildew of Grape
foliage of grape
Powdery mildew of wheat
-
Powdery mildew of tomato
-
Gibberella Stalk Rot
Most common stalk rot in Corn Belt
- Pinkish red discoloration inside the stalk
- Black fruiting bodies on the outside - Perithecia
Diplodia stalk rot
- Dark Brown/Black pycindia
- Two celled conidia
Fusarium Stalk Rot
- White Fungal growth on the outside of stalk
- Pink discoloration on inside of stalk
Anthracnose Stalk Rot
Big black spots on stalk surface = fungal acerculli
Gibberella Ear Rot
Red or Pink color mold
always starts at the ear tip and progresses to base
Diploidia ear rot
Presence of white mycelium of the fungus growing between the kernels;
visually starts at base
Fusarium Ear Rot
Presence of white, pink, salmon colored mycelium
usually scattered throughout ear or localized on injured kernels
infectedkernels may turn tan or brown
Pencilium ear Rot
Dark-Blue-green mold at ear tip
Aspergillius Ear Rot
Olive or yellow green mold growtn between kernels
Anywhere on ear
