Corn smut is a unique and fascinating fungus that affects corn plants. It is caused by a fungus called Ustilago zeae, which is spread by wind-blown spores. These spores can survive in the soil for up to three years, making it difficult to completely eliminate corn smut from a garden.

Symptoms of Corn Smut

Corn smut is characterized by the formation of large, unsightly galls on the leaves, fruit, and silk of corn plants. These galls can vary in size from small, pea-sized growths to large, fist-sized tumors. The galls are initially white or silvery, but they darken to a greenish-black color as they mature.

Impact of Corn Smut

Corn smut can cause significant yield losses in corn crops, with up to 20% of ears being affected in some cases. However, it is generally considered a minor corn disease because the galls are not harmful to humans or animals. In fact, corn smut is considered a delicacy in some cultures, and it is known by the name “cuitlacoche” in Mexico.

Treatment and Prevention of Corn Smut

There is no cure for corn smut once it has infected a corn plant. However, there are some steps that can be taken to minimize the risk of infection and reduce the severity of the disease:

• Clean up corn debris: Remove all corn stalks, leaves, and husks from the garden after harvest. This will help to reduce the number of spores available to infect new plants.
• Plant resistant varieties: Some varieties of corn are more resistant to corn smut than others. Look for white corn varieties such as Argent, Brilliant, Fantasia, Pristine, Seneca Sensation, Seneca Snow Prince, Seneca Sugar Prince, Silver King, Silver Prince, and Summer Flavor 72W.
• Avoid overwatering: Corn plants that are overwatered are more susceptible to corn smut infection. Water your corn plants deeply but infrequently, and allow the soil to dry out slightly between waterings.
• Fertilize regularly: Corn plants that are well-fertilized are more likely to resist corn smut infection. Fertilize your corn plants according to the manufacturer’s instructions.

Corn Smut as a Delicacy

In some cultures, corn smut is considered a delicacy. It is known by the name “cuitlacoche” in Mexico, and it is used in cooking in a similar way as a white mushroom. Cuitlacoche has a unique flavor and texture that is prized by many gourmands.

Conclusion

Corn smut is a fascinating and complex fungus that can affect corn plants. While it can cause yield losses in corn crops, it is generally considered a minor disease. There are steps that can be taken to minimize the risk of infection and reduce the severity of the disease, including cleaning up corn debris, planting resistant varieties, avoiding overwatering, and fertilizing regularly. In some cultures, corn smut is even considered a delicacy and is used in cooking.

What is Sweet Corn High Plains Disease?

Sweet corn high plains disease is a viral disease that affects corn, wheat, and certain types of grasses. It was first identified in Idaho in 1993 and has since spread to other states. The virus is transmitted by the wheat curl mite, a tiny wingless mite that is carried from field to field on air currents.

Symptoms of Sweet Corn High Plains Disease

The symptoms of sweet corn high plains disease can vary widely, but may include:

• Weakened root systems
• Stunted growth
• Yellowing of the leaves, sometimes with yellow streaks and flecks
• Reddish purple discolorations or wide yellow bands on mature leaves
• The bands turn tan or pale brown as the tissue dies

How to Control Sweet Corn High Plains Disease

Unfortunately, there is no cure for sweet corn high plains disease. However, there are a few things you can do to control the disease and minimize its impact on your corn crop:

• Control grassy weeds and volunteer wheat in the area around the planting site. These plants can harbor both the disease pathogens and the wheat curl mites that transmit the virus. Control should occur at least two weeks before corn is planted.
• Plant seeds as early in the season as possible. This will give the corn plants a chance to mature and produce ears before the wheat curl mites become active.
• Use disease-resistant corn varieties. Some varieties of corn are more resistant to sweet corn high plains disease than others. Ask your local seed dealer for recommendations.
• Apply insecticides to control wheat curl mites. There are a few insecticides that are effective against wheat curl mites. Your local cooperative extension office can provide more information about these products and whether they are appropriate for your garden.

Additional Information

• The wheat curl mite can also transmit other viruses, including wheat streak mosaic virus and barley yellow dwarf virus.
• Sweet corn high plains disease is most common in areas with warm, dry climates.
• The virus can survive in soil and plant debris for up to two years.

Conclusion

Sweet corn high plains disease is a serious disease that can cause significant losses to corn crops. However, by following the control measures outlined in this article, you can minimize the impact of the disease and protect your corn crop.

Introduction:

Maize dwarf mosaic virus (MDMV) is a serious disease that affects corn plants worldwide. It is caused by two major viruses: sugarcane mosaic virus and maize dwarf mosaic virus. This virus can have a significant impact on corn yields, so it is important for farmers to be aware of the symptoms, transmission methods, and control measures.

Symptoms of Maize Dwarf Mosaic Virus:

MDMV can cause a variety of symptoms in corn plants, including:

• Small, discolored specks on leaves
• Yellow or pale green stripes or streaks running along leaf veins
• Yellowing of entire leaves, especially when temperatures are high
• Reddish blotches or streaks on leaves when nights are cool
• Stunted growth and a bunchy appearance
• Reduced ear size or lack of kernels
• Root rot

Transmission of Maize Dwarf Mosaic Virus:

MDMV is primarily transmitted by aphids, which are small insects that feed on plant sap. When an aphid feeds on an infected corn plant, it picks up the virus and can then transmit it to other healthy plants. Johnson grass, a common weed, is a major host plant for MDMV and can serve as a reservoir for the virus, spreading it to nearby corn crops.

Control and Prevention of Maize Dwarf Mosaic Virus:

There are several strategies that farmers can use to control and prevent MDMV:

• Planting resistant varieties: Corn varieties that are resistant to MDMV can help to reduce the risk of infection.

• Controlling Johnson grass: Eliminating Johnson grass from fields and surrounding areas can help to reduce the population of aphids that transmit the virus.

• Monitoring for aphids: Regular inspections of corn plants for aphids can help to identify infestations early on.

• Using insecticidal soap spray: Insecticidal soap spray can be used to control aphids and prevent the spread of MDMV.

• Applying systemic insecticides: In cases of severe infestations, systemic insecticides may be necessary to control aphids and protect corn plants from MDMV.

Additional Tips for Preventing Maize Dwarf Mosaic Virus:

• Encourage neighboring farmers to control Johnson grass to reduce the risk of MDMV transmission.
• Avoid planting corn near fields where MDMV has been reported.
• Practice good sanitation by removing infected plant debris from fields.
• Rotate corn crops with other non-host plants to break the disease cycle.

Conclusion:

Maize dwarf mosaic virus is a serious threat to corn crops worldwide. By understanding the symptoms, transmission methods, and control measures, farmers can take steps to protect their crops and minimize the impact of this disease.

Corn head smut is a serious fungal disease that can cause significant yield loss in corn crops. It is caused by the pathogen Sphacelotheca reiliana and can infect corn plants at any stage of growth, but the symptoms typically appear during the flowering and fruiting stages.

Symptoms of Corn Head Smut

Corn head smut is characterized by the following symptoms:

• Irregular, black, wiry growth on corn tassels and ears
• Stunted growth and teardrop-shaped ears
• Odd, finger-like extensions growing from infected cobs

How Corn Head Smut Spreads

Corn head smut is spread through spores that are produced by the fungus. These spores can be carried by wind, water, or insects. Once the spores land on a corn plant, they can germinate and infect the plant through wounds or natural openings.

Impact of Corn Head Smut

Corn head smut can have a devastating impact on corn crops. Infected plants may produce no ears or produce ears that are deformed and unmarketable. In severe cases, corn head smut can cause entire fields to be destroyed.

Management of Corn Head Smut

There are no effective control methods available for treating corn head smut once symptoms of the disease are present. However, there are several preventative measures that can be taken to reduce the risk of infection, including:

• Using fungicide on seeds: Applying a fungicide to corn seeds before planting can help to prevent the fungus from infecting the plants.
• Planting resistant varieties: Planting corn varieties that are resistant to corn head smut can also help to reduce the risk of infection.
• Crop rotation: Rotating corn crops with other crops that are not susceptible to corn head smut can help to reduce the buildup of the fungus in the soil.
• Sanitation: Removing and destroying infected corn plants and debris can help to prevent the spread of the disease.

How to Identify Corn Head Smut

Corn head smut is relatively easy to identify. The most common symptom is the presence of irregular, black, wiry growth on corn tassels and ears. Infected plants may also be stunted and have teardrop-shaped ears.

How to Treat Corn Head Smut

There are no effective treatments for corn head smut once symptoms of the disease are present. However, fungicides can be used to prevent the disease from spreading to healthy plants.

How to Prevent Corn Head Smut

The best way to prevent corn head smut is to use a combination of preventative measures, including:

• Planting resistant varieties
• Using fungicide on seeds
• Practicing crop rotation
• Removing and destroying infected plants and debris

Conclusion

Corn head smut is a serious fungal disease that can cause significant yield loss in corn crops. However, there are several preventative measures that can be taken to reduce the risk of infection. By following these measures, farmers can help to protect their corn crops from this devastating disease.

Corn is a staple crop in the United States, and many people grow it in their gardens or consume it in large quantities during the summer months. If you’re growing corn, you may have noticed small shoots growing from the base of the main stalk. These shoots are called corn tillers, and they’re a natural part of the corn plant’s growth process.

What Are Corn Tillers?

Corn tillers are vegetative or reproductive shoots that grow from the axillary buds on the lower five to seven stalk nodes of a corn plant. They’re essentially identical to the main stalk and can even form their own root system, nodes, leaves, ears, and tassels.

Tillers are often mistaken for suckers, which are shoots that grow from the roots of a plant and can rob the main plant of nutrients. However, corn tillers are not suckers and do not have a negative impact on the main plant’s growth.

When Do Corn Tillers Form?

Tillers typically form later in the growing season, when the corn plant has surplus energy to foster their development. They can also form after an injury to the main stalk, such as hail damage, frost, or insect damage.

Are Corn Tillers Detrimental?

There is no evidence to suggest that corn tillers have any adverse effects on the main plant. In fact, they may even provide some benefits, such as:

• Increasing the plant’s yield by producing additional ears of corn
• Providing a backup stalk in case the main stalk is damaged

Should You Remove Corn Tillers?

Since corn tillers are not harmful to the plant, there is no need to remove them. In fact, it’s better to leave them alone, as pruning them can damage the main stalk and open it up to insects or disease.

How to Identify Corn Tillers

Corn tillers can be identified by their location on the stalk and their appearance. They grow from the lower stalk nodes and are identical to the main stalk, with leaves, nodes, and ears.

Conclusion

Corn tillers are a natural part of the corn plant’s growth process. They do not have a negative impact on the plant’s growth and may even provide some benefits. Therefore, it’s best to leave them alone and let them do their thing.