Mukhtar, Fatimah Batul , Singh, B.B. .
Differential Growth Response of Photoperiod Sensitive and Photoperiod Insensitive Cowpea Varieties to Planting Season and Hormone Treatment.
Traditional cowpea varieties are photoperiod sensitive(PS) growing profusely in the normal planting season(rainy season) when daylength is long and become dwarf when planted in the dry season under short day condition. This study was undertaken to determine whether exogenous application of gibberellic acid will enhance the growth of the PS varieties in the dry season with irrigatio. The study was carried out at the International Institute forTropical Agricuture(IITA) Kano station. Two PS and two photoperiod insensitive (PI) cowpea varieties were planted during the rainy season (July to October) and dry season (February to April). Foliar application of gibberellic acid was carried out in three doses before bud initiation. Plant height, internode development, branching, number of leaves, total plant dry weight and yield of the PS varieties were affected by planting season, while the PI varieties were not. Application of gibberellic acid stimulated increased growth and yield in the PS varieties, as well as enhanced plant height and internode lenght in the PI in both planting seasons.
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1 - Bayero University,, Biological Sciences, Department of Biological Sciences,, Bayero University, P.M.B. 3011, Kano, Kano, P.M.B.3011, Nigeria
2 - International Institute for Tropical Agriculture, Breeding Unit, I.I.T.A. Kano station, Kano, Kano, P.M.B. 3112, Nigeria
Presentation Type: Oral Paper:Papers for Sections
Location: Stevens 1/Hilton
Date: Wednesday, July 11th, 2007
Time: 2:00 PM