817820D9-64E5-90C1-236D-3EEF086F28A1
 

Anthracnose Stalk Rot

In-Depth Downloads

Symptoms - Early Season

  • Same fungus may cause a foliar disease early in the season
Anthracnose Symptoms

Symptoms - Midseason

  • Top-down symptom of plant death often observed a few weeks after tasseling ("top dieback" )
anthracnose stalk rot in corn field

Symptoms – Late Season

  • Shiny black coloration on outside of stalk late in season
  • Internal stalk discoloration at nodes
  • Stalk may be easily crushed when squeezed at base
  • Stalk may lodge when pushed sideways
corn stalk with anthracnose stalk rot
 
Shiny black coloration on outside of stalk late in season is a symptom of anthracnose stalk rot.

Identification of Anthracnose Stalk Rot

  • For a positive identification of the disease with a hand lens, look for the presence of setae, which are bristlelike hair structures on the stalk surface.
Setae are often found within a mucouslike droplet.
setae on stalk surface
If a microscope is available, look for clear, curved spores (below).
Identification curved spores photo

Anthracnose Facts

  • Caused by Colletotrichum graminicola, a fungal pathogen
  • Most common stalk disease of corn
  • Favored by plant stress following pollination
  • Disease development may result in:
    • Plant lodging
    • Reduced ability to harvest
    • Yield reduction

Disease Cycle of Anthracnose Stalk Rot

anthracnose stalk rot disease cycle

Management of Anthracnose Stalk Rot

  • Crop rotation - at least 1 year out of corn
  • Tillage - encourages breakdown of crop residue, reducing disease inoculum
  • Genetic Resistance
    • DuPont Pioneer plant breeders select hybrids and parent lines for resistance, using induced and natural infection.
    • DuPont Pioneer pathologists assist breeders in their efforts to inoculate, screen and characterize products.
    • Hybrids differ significantly in resistance to anthracnose. Scores for Pioneer® brand hybrids generally range from 2 to 7 on a 1 to 9 scale (9=resistant).
    • Your Pioneer sales professional can help you select high-yielding hybrids with the appropriate level of disease resistance and other key traits needed for your field.
10AD045A-5E45-4909-B55D-43823350ACDF

 
Weather
Close this Tab

Weather Dashboard

See All | Customize

The latest data for your fields at-a-glance.

Today's Forecast
Time Temp Precip Wind
5-Day Forecast
Date Low High
Close this Tab

Markets Dashboard

See All | Customize

The latest data for your fields at-a-glance

Commodity Futures

Quotes delayed 20 minutes.
Commodity Price Change Last Updated
Commodity Futures Feed Not Available
Quotes delayed 20 minutes. Data provided by FutureSource

Local Cash Markets

Commodity Price Basis Last Updated
Local Cash Market Feed Not Available