What is Diplodia corn?
Diplodia ear rot, caused by the fungus, Stenocarpella maydis, has become a common and troublesome fungal disease on Indiana corn. The increase in no-till or reduced-till acreage, plus continuous corn without rotation are factors that favor Diplodia ear rot.
What causes Diplodia?
Caused by the fungus Stenocarpella maydis, previously known as Diplodia maydis. Wet weather during grain fill and upright ears with tight husks promote Diplodia. Pathogen can cause ear rot, stalk rot and seedling blight.
What causes cob rot in corn?
Nigrospora ear and cob rot is a fungal disease caused by Nigrospora oryzae. The disease can occur throughout corn-growing areas, although it is rarely seen. When the disease occurs, it often goes unnoticed until harvest.
What does corn rot look like?
Affected ears usually have infected kernels scattered over the ear among healthy-looking kernels or are confined to kernels that are damaged. The fungus appears as a white mold and infected kernels sometimes develop a brown discoloration with light colored streaks.
How do you control Fusarium ear rot?
Managing the Disease Research has demonstrated that reducing insect damage to ears will significantly reduce the impact of Fusarium ear rot disease. Corn hybrids with Bt traits to control earworms and European corn borer usually have less Fusarium ear rot and fumonisin contamination.
What is a cob rot?
Definition of cob rot : a disease of corn due to a fungus (Nigrospora sphaerica) of the family Dematiaceae that causes yellowish basal rot and shredding of the ear.
What causes Diplodia tip blight?
Diplodia tip blight is caused by the fungal pathogen Diplodia pinea (also known as Sphaeropsis sapinea). Spores of the fungus develop in the black pycnidia located at the base of infected needles and other affected plant parts from spring through fall.
How is Diplodia tip blight treated?
Diplodia tip blight does respond to fungicide treatments, which should start at bud break in the spring for effective control. If these treatments aren’t used, then cones should also be removed during pruning because they hold many fungal spores.
How do you control stalk rot?
Managing Bacterial Stalk Rot: There are no rescue treatments for bacterial stalk rot. Management primarily includes destruction of crop residue with tillage and avoiding use of contaminated water supply for overhead irrigation. Crop rotation is likely to help with avoidance of this disease.
Does a corn cob rot?
Corn with ear rot is not often evident until harvest. It is caused by fungi that can produce toxins, rendering the corn crop inedible to both humans and animals.
Can sweet corn Get blight?
Stewart’s Wilt (Bacterial Leaf Blight) This disease causes wilt and death of seedlings and leaf blight of mature sweet corn plants. Long water-soaked lesions may extend the length of seedling leaves. The seedlings then soon wilt and die. On mature plants, the most common symptoms are leaf lesions.
Why are my corn stalks brown?
Corn plants most commonly get brown leaf tips due to underwatering or inconsistent watering. Other common causes include water high in fluoride or chlorine, or sources of plant stress such as low humidity, excess fertilizer, excess heat and light, pests, diseases and stress due to acclimation or repotting.