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Rutabaga > Black mold
Why Are Rutabaga Affected by Black Mold?
Rutabaga, also known as Oilseed rape, Canola, Colza, Rapeseed oil seed, Snagger
Black mold is a fungal disease which negatively impacts the growth, development, and productivity of Rutabaga, leading to severe yield loss. It manifests as black, velvety spots on leaves, stems, and roots, often during damp and warm condition.

Symptom Analysis

Black mold starts as tiny black spots on leaves, stems, and roots of Rutabaga. These spots gradually enlarge, becoming raised and velvety. In severe cases, it may cause the entire leaf to wither and fall off.
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What Causes Black mold Disease on Rutabaga?

Pathogen
The disease is primarily caused by the fungus 'Alternaria brassicicola' that thrives in humid, wet conditions.
Environmental conditions
The fungus is spurred into activity by warm, humid climates and overcrowded plantings that restrict airflow.
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How to Treat Black mold Disease on Rutabaga?

Non pesticide
Removal of infected parts: Removing and discarding of infected leaves, stems, and roots helps reduce the spread of the disease.

Improvement of planting conditions: Planting Rutabaga with ample spacing and in a well-drained area allows proper air circulation, reducing the probability of fungal infection.
Pesticide
Usage of Fungicides: The application of a suitable fungicide effectively controls the spread of black mold.

How to Prevent Black mold on Rutabaga?

Proactive monitoring
Regularly checking Rutabaga for signs of black mold aids early detection and control.
Crop rotation
Rotation of crops aids in disrupting the life cycles of pest and disease causing pathogens, including the black mold fungus.
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When is Black mold Most Active Period on Rutabaga?

Black mold is most active in late summer and fall, when temperatures are warmer and rainfall is common, creating the high-humidity environment it thrives in.

Infectivity

Black mold spores can disperse widely and quickly in conducive conditions, causing broad-scale infection.

Lethality

While lethal in severe cases, many Rutabaga can survive and recover with appropriate and prompt treatment.

FAQs on Rutabaga

How quickly does black mold spread on Rutabaga?
In humid, warm conditions, black mold can spread rapidly. Depending on these conditions, signs can appear as quickly as 5-7 days post-infection.
Can Rutabaga recover from black mold infection?
Yes, if treated early and effectively, Rutabaga can recover from black mold. However, it's important to monitor for any recurring symptoms.
Does black mold affect the edible parts of Rutabaga?
In severe infections, the fungus can impact all parts of the plant, including the edible roots. Consumption of severely mold-affected parts is not recommended.
Can black mold persist in the soil?
Yes, the black mold fungus can survive in soil as spores, infecting next season's crop. That's why crop rotation is crucial.
Does pruning aid in controlling black mold on Rutabaga?
Yes, pruning helps enhance air circulation and reduce humidity around the plant. It is, therefore, a useful practice in controlling black mold.
Is it safe to consume Rutabaga with minor signs of black mold?
Consumption should be cautiously decided upon the extent of the infection. It's typically safe to eat Rutabaga with minor surface spotting, but those with deep fungal growth should be avoided.
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