What causes anthracnose rot?
What causes anthracnose rot?
Anthracnose stalk rot, caused by the fungus Colletotrichum graminicola, has increased in economic importance, and is now one of the most common stalk rots in Indiana. Anthracnose stalk rot is caused by the same fungus that causes anthracnose leaf blight.
What is anthracnose in corn?
Anthracnose is caused by the fungus Colletotirchum graminicola which overwinters on corn residue. Spores spread to growing plants by windblown rain and rain splash. Disease severity can be increased during extended periods of low light intensity (overcast conditions) and high humidity.
How do you control stalk rot?
The following practices can help reduce stalk rot, lodging and harvest losses:
- Hybrid differences. Hybrids vary in their resistance to leaf diseases, stalk rots, drought stress and stalk lodging.
- Soil Fertility.
- Crop stress.
- Corn Residue.
What is bacterial stalk rot?
Bacterial stalk rot is caused by Erwinia dissolvens. It causes decay of the first internode above the soil. The rind and the pith become soft, brown, and water-soaked. Affected plants have a foul odor.
How do you control anthracnose leaf blight?
The best way to reduce anthracnose is to use resistant hybrids. Tillage may be beneficial where appropriate, and crop rotation can reduce early season infection.
Is anthracnose curable?
Anthracnose Disease Info Dry and hot weather stop the progression of the disease that may begin again once the weather conditions become optimal. The problem can be cyclic but is rarely fatal. Anthracnose fungus infects many deciduous and evergreen trees and shrubs, as well as fruits, vegetables, and grass.
What trees are affected by anthracnose?
Unfortunately, trees most likely to be affected are quite common, such as ash, dogwood, elm, hickory, maple, oak, sycamore, and walnut. The most common symptoms of anthracnose are tan to brown or black blotched areas on leaves which develop along the leaf veins.
When does Anthracnose stalk rot occur in corn?
The disease usually does not appear until late in the season and occurs more severely where corn follows corn, especially in reduced tillage. Resistance to anthracnose is available in some hybrids. If a hybrid is resistant to stalk rot, it is not necessarily resistant to the leaf blight phase.
What kind of fungus is on corn stalks?
The corn anthracnose fungus is even more likely to occur as a stalk rot than a foliar infection. Anthracnose stalk rot is the most common corn stalk rot and occurs late in the growing season. It is seen initially in the rind tissue as narrow, vertical or oval-shaped lesions.
What causes black spots on the stalks of corn?
The more common ones are summarized below. Anthracnose stalk rot is caused by the fungus Colletotrichum graminicola, which can also cause a leaf disease and is a common cause of top rot or dieback disease of corn. In more advanced stages the disease can cause the development of black lesions on the outside of the stalk.
What kind of rot does corn plant have?
Anthracnose is likely the most prevalent stalk rot in the eastern United States. Affected plants have shredded pith and die prematurely. Anthracnose also causes a distinctive blackening of the stalk rind.