Corn Diseases Flashcards
How much corn did MB produce in 2023?
11%
What are the symptoms of Gibberella ear rot?
Fusarium growth from the tip of the cob to slowly progresses down the cob as infestation progresses.
What mycotoxins are produced by fusarium graminearum and due to the disease gibberella ear rot?
Deoxynivalenol (DON)
Zearalenone (ZEN)
Where does infection usually occur for Gibberella Ear rot?
Usually through silks. sometimes through kernel wounds and systemically through wounds.
What is the most common mycotoxin in food and feed?
DON
What livestock is most sensitive to DON?
Swine
What are some negative effects of DON on swine and other young animals?
- Feed suppression
- Feed Refusal
- Reduced weight gain
- Impaired organ function.
How does the ZEN mycotoxin manifest in swine and dairy?
It affects estrogen activity leading to reproductive effects.
What are 3 effects that ZEN has on cattle?
- Infertility
- Reduced milk production
- Hyper-estogenism
What fungus causes Gibberella ear rot?
Fusarium graminearum
What fungus causes Fusarium ear rot?
Fusarium verticillioides
What is the symptom of fusarium ear rot?
Sporadic (Scattered) appearance of affected kernels.
What mycotoxin is produced by fusarium verticillioides?
Fumonisim (FB)
Which animals are affected by the mycotoxin FB?
Cattle, Swine, Sheep and Horses
What fungus causes Penicillium Ear Rot?
Penicillium
What are the symptoms of Penicillium Ear Rot?
Blue-green or greyish fungal growth on or in between kernels, usually near the tip of the cob.
What mycotoxin is produced by Penicillium Ear Rot?
Ochratoxin A
What livestock animals are affected by Ochratoxin A mycotoxin?
Swine and Poultry
What are the effects of Ochratoxin A on swine and poultry?
- Reduced feed intake, and dehydration.
- Growth retardation.
- Kidney Dysfunction
- Diarrhea and excessive urine production
- Reduces egg production
- Vomiting (Swine)
What is the causal agent of Aspergillus Ear rot?
Aspergillus flavus and Aspergillus parasiticus.
What are the symptoms of Aspergillus Ear rot?
Brownish, grey-green powdery mold on or in between kernels. Mold can develop anywhere on the ear however symptoms are often found at damaged areas.
What animals are affected by Aflatoxins?
Dairy cattle, Swine, Poultry, and Horses.
How much Aflatoxin gain are you not allowed to blend?
more gthan 20 ppb
What fungus is the causal agent for the common smut?
Ustilago maydis
