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Pakistan Journal of Biological Sciences

Year: 2001  |  Volume: 4  |  Issue: 8  |  Page No.: 940 - 944

The Flowering and Fruiting Behaviour of Some Commercial Varieties of Cotton Gossypium hirsutum L.

Muhammad Haneef, Muhammad Arshad, Sajjad Haidar, Muhammad Afzal, Muhammad Rashid and Zia-ul-Qamar

Abstract

The flowering and fruiting behaviour of some commercial varieties of cotton was studied for proper planning of insect pest management and application of other inputs like fertilizer and irrigation. The results revealed that total flowering and boll formation period was longer in early maturing varieties than in late maturing. Boll formation period of each variety did not exactly coincide in different years. The varieties CIM-482, Karishama and CIM-109 produced more number of flowers but due to higher shedding percentage their total mature bolls per plant were on lower side. CIM-446 and CIM-473 completed 75-90% of their flowering up to 1st week of September while most of others completed their maximum flowering up to the week ends on 23rd September. CIM-446 and CIM-473 completed their maximum boll formation in the week of 15th to 30th September. Boll opening started slowly in earlier weeks and the earliest was observed in genotype CIM-473. Varieties CIM-240, CIM-109 and CIM-482 had maximum shedding during the week ends on 31st August and earlier September. From these observations it was concluded that variety CIM-446 and genotype CIM-473 were early maturing with lower shedding percentage and maximum boll retention ability as compared to other varieties under Multan conditions.

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