Preventing Potato Scab in Redskin Potatoes

Potato scab is a common disease that affects potatoes, including redskin potatoes. It is caused by a soil-borne bacterium called Streptomyces scabies. The disease manifests as rough, corky lesions on the surface of the potato tubers, which can greatly reduce their market value.

1. Crop Rotation

One effective method to prevent potato scab is through proper crop rotation. Avoid planting potatoes or other susceptible crops, such as beets or carrots, in the same field for consecutive years. This helps to break the disease cycle by depriving the bacterium of its host plants.

2. Soil pH Adjustment

Another preventive measure is to maintain the soil pH within the optimal range for potato growth, which is typically between 5.0 and 6.5. Acidic soils with a pH below 5.0 create favorable conditions for the development of potato scab. Regular soil testing and the addition of lime can help adjust the pH if necessary.

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3. Resistant Varieties

Choosing potato varieties that are resistant to scab can significantly reduce the risk of infection. Some redskin potato varieties, such as ‘Norland’ and ‘Red Pontiac’, have shown resistance to scab. These varieties have been bred to possess genetic traits that make them less susceptible to the disease.

4. Proper Irrigation

Proper irrigation practices can also play a role in preventing potato scab. Overly wet or waterlogged soil can create favorable conditions for the bacterium to thrive. It is important to provide adequate drainage and avoid excessive irrigation, especially during the tuber formation stage.

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5. Seed Treatment

Before planting, it is recommended to treat potato seed tubers with fungicides or bactericides that specifically target the scab-causing bacterium. This can help reduce the initial inoculum and prevent the disease from establishing itself in the field.

6. Organic Matter Management

Proper management of organic matter in the soil can also contribute to scab prevention. Incorporating well-rotted compost or organic amendments into the soil can improve its structure and nutrient content, creating a healthier environment for the potato plants and reducing the likelihood of scab infection.

By implementing these preventive measures, farmers can minimize the risk of potato scab in redskin potatoes, ensuring healthier crops and higher market value.

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Keywords: potato, potatoes, disease, redskin, bacterium, proper, varieties, reduce, irrigation