International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2022 - IJCMAS--ICV 2022: 95.28 For more details click here
National Academy of Agricultural Sciences (NAAS) : NAAS Score: *5.38 (2020) [Effective from January 1, 2020] For more details click here

Login as a Reviewer

See Guidelines to Authors
Current Issues
Download Publication Certificate

Original Research Articles                      Volume : 8, Issue:5, May, 2019

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : /
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(5): 539-554

Abscission of Fruiting Structures in Bt and non-Bt Cotton in Relation to Abiotic Factors and Agronomic Intervention under Rainfed Condition
M.R. Thakur1* and V.M. Bhale2
1Soil and Water Management, NARP Phase II, Cotton Research Sub Station, Navsari Agricultural University, Achhalia, Gujarat, India-393120
2Department of Agronomy, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra, India-444104
*Corresponding author

A two year field experiment was conducted to elucidate relation of abscission of fruiting structures in cotton (Gossypium hirsutum) with abiotic factors and effect of agronomic intervention viz., spacing (90 × 60 cm and 90 × 45 cm) and NPK levels (50:25:25, 62.5:31.25:31.25 and 75:37.5:37.5 kg NPK ha-1) on abscission of fruiting structures, leaf reddening and chlorophyll content in Bt and non-Bt cotton of same genotype, following split plot design with 4 replicates at Akola. Abscission of fruiting structures increased linearly with increase in morning relative humidity and number of rainy days in a week. However, relations with minimum temperature, evening relative humidity and rainfall were non linear and varied according to their range. Minimum temperature range of 20-22 °C, evening relative humidity beyond 52% and rainfall more than 60 mm in a week were most critical for abscission. Bt cotton lost more fruiting structures through abscission, recorded maximum leaf reddening, but gave higher seed cotton yield. Whereas, non-Bt recorded maximum chlorophyll content. Spacing of 90 x 45 cm compensated abscission losses and recorded higher seed cotton yield than 90 x 60 cm. Application of 75:37.5:37.5 kg NPK ha-1 recorded higher seed cotton yield by minimizing abscission and leaf reddening with improvement in chlorophyll content but was at par with 62.5:31.25:31.25 kg NPK ha-1. Thus, it can be conclude that to harness higher seed cotton yield under rainfed condition Bt cotton should be sown at 90 x 45 cm spacing and fertilized with 62.5:31.25:31.25 kg NPK ha-1.

Keywords: Abscission of fruiting structures, Abiotic factors, Bt and non-Bt cotton, NPK levels, Spacing

Download this article as Download

How to cite this article:

Thakur, M.R. and Bhale, V.M. 2019. Abscission of Fruiting Structures in Bt and non-Bt Cotton in Relation to Abiotic Factors and Agronomic Intervention under Rainfed Condition.Int.J.Curr.Microbiol.App.Sci. 8(5): 539-554. doi:
Copyright: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike license.