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Asian Journal of Plant Sciences
Year: 2003  |  Volume: 2  |  Issue: 3  |  Page No.: 325 - 330

Maturity of Cotton Cultivars in Multan as Determined by Nodes above White Flower

Muhammad Iqbal, Muhammad Ali Chang, Abid Mahmood, Muhammad Zafar Iqbal, Mahmood-ul- Hassan and Noor-ul- Islam    

Abstract: The node above white flower (NAWF) technique was used to monitor the growth, development and maturity of ten cotton varieties viz. Reshmi, CIM-443, MNH-93, MNH-329, MNH-395, MNH-439, S-12, FH-900, CIM-1100 and NIAB-78 during the years 1997, 1998 and 1999. The NAWF counts were made at weekly intervals. By regressing NAWF means over time, the number of days to reach NAWF of 5.0 (NAWF-5) was determined. Days to NAWF-5 were highly correlated with percent first pick of seed cotton yield. It was observed that NIAB-78 and CIM-443 achieved NAWF-5 earlier by 109.86 and 109.09 days (average of three years). Days to NAWF-5 provided a focal point for all management decisions. Therefore, it became evident that NAWF technique could be used for monitoring cotton plant after flowering, earliness determination of variety/strain and detecting fruiting problems during growth season.

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