Boll opening percentage

A field experiment conducted on clay soil of Regional Agricultural Research Station, Lam, Guntur, during kharif 2017-18.

7p angicungduoc5 12-06-2020 10 0   Download

A research trail was conducted to determine the effect of defoliants on defoliation and yield of cotton. Cotton (Gossypium hirsutum L.) cultivar ‘Suraj’ was planted during kharif 2016 and defoliants were sprayed at 60 boll opening percentage (BOP). A degree day above than 100°C was required after defoliants application for completion of defoliation process and opening of boll. The atmospheric minimum and maximum temperatures of 17.7 and 32.1°C, respectively, were found conducive for inducement of defoliation process.

5p quenchua4 16-04-2020 10 2   Download

The working group of G. hirsutum germplasm accessions was characterized for Distinctiveness, Uniformity and Stability testing. Subsequent analysis of data was done to study the genetic diversity available among the accessions using principal component and clustering of 320 cotton germplasm. Under field and laboratory, 26 qualitative traits and 14 quantitative traits were recorded. There is no variation observed for gossypol glands, anther filament colour, male sterility, boll bearing habit and boll opening.

19p cothumenhmong1 08-12-2019 19 1   Download