Club root:
Symptoms:
- Affected plants remain stunted.
- Tiny nodules to large club shaped outgrowths develop in the root system.
- Leaves turn pale green or yellow followed by wilting and under severe conditions the plants die
Management:
- Soil fumigation with Methyl bromide 1kg/10m2 followed by covering with plastic film.
- Seed treatment with Captan/Thiram 4g/kg, followed by T.viride 4g/kg.
- Application of lime 2.5 t/ha.
- Soil drenching with Copper oxychloride 0.25%.
Sclerotinia stem rot:
Symptoms
- Stems develop water soaked spots near the crown region which later may be covered with cottony white mycelium.
- As disease progresses the affected portions of the stem develop a bleached appearance at the internodes and eventually the tissues shred.
- Premature ripening and shredding of stem, wilting, and drying
- In later stages black sclerotial bodies are also seen on infected plants.
Management
- Use crop rotation; do not plant highly susceptible crops more than once in four years, including dry edible beans, sunflowers, mustard and canola. Use at least a five year rotation for severely infested fields.
- Avoid planting next to a field that had severe Sclerotinia in the past four or five years.
Harvesting-
Harvesting should be carried out as soon as pods begin to turn yellow and seed becomes harder. The mustard crop matures in about 110-140 days. Harvesting should be done in early morning hours to avoid any shattering of seed. Use a sickle to cut the crop close to the ground.
Post-harvest task-
Harvested mustard plants should be tied into bundles, keep them in the sun for 5-6 days to dry. Thrashing can be carried out by beating the mustard plant with a stick. Winnowing is done to separate the grain from the husk.
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