Bolting on onion (Physiological disorder)

Causal :-

• Due to heredity differences in variety.
• Extreme fluctuations in temperature.
• Stunted growth of plants in seed beds.
• Very low temperature in the beginning of the growth favours

Symptoms:-

• When the plant reaches the five leaf stage critical stage of bolting takes place.
• Under this condition bulbs become light and fibrous.
• When the plant on put up a central stalk which develops a seed head, bolting take place.

Control:-

• Sow the seed at proper time.
• Use of over fertilizer should be avoided.

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