Abstract
Under 16 and 20 bouts photoperiod treatments plants of may flower only after transferring to shorter daylength condition Plants after 20 days in both 16 and 20 hours photoperiod treatments do not flower. After 40 days of photoperiod treatment, plants showed incomplete flower bud differentiation with shorter flower stalk, fewer number of flowers per umbel and low bolting percentage. When extended treatment to 60 days in both photoperiods plants had significantly increased in percentage of bolting as well as farther perfection in flower bud differentiation but fewer plants showed degraded umbels after bolting. Plants under 20 hours photoperiod gave better result in bolting percentage than the 16 hours. percentage of bolting increased rapidly for g days treated plants but total number days from beginning of treatment to bolting also increased which is due to longer periods in photoperiod treatment.
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