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EMERGENT LIFE SCIENCES RESEARCH - Vol 8, Issue 2, Published on 31, December 2022

Pages: 41-51
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Physico-morphological and biochemical studies related to sucking pests in upland cotton (Gossypium hirsutum L.)

Author: H. B. Kumbhalkar, V. L. Gawande, Vinita Gotmare, V. N. Waghmare

Category: Research Article


The field experiment comprising of 52 Gossypium hirsutum genotypes was conducted at Cotton Research Unit, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola during kharif, 2017-18.Based on sucking pest infestation, physico-morphological and biochemical traits of cotton, AKH 11-7 was identified as a source of resistance against sucking pests which possessed the highest mean performance for trichome density along with desirable mean performance for total phenol content. Other parental lines viz., AKH 9916 and AKH 2012-9 exhibited higher mean performance for trichome density with one or more traits. A cross combination AKH 8828 x DHY 286 recorded maximum trichome density with minimum number of jassids/3 leaves and also exhibited higher total phenol and tannin content over the check. Other hybrids, AKH 8828 x AKH 9916, AKH 081 x AKH 2006-2 and AKH 081 x AKH 10-10 recorded higher trichome density and also showed desirable performance for one or more trait(s) viz., total phenol, tannin content and number of gossypol glands/mm2. The correlation between trichome density and number of jassids/3 leaves was negative and highly significant, whereas correlation between trichome density and number of whiteflies/3 leaves was found positive and highly significantfor parental lines and crosses. Positive and highly significant correlation was recorded between total phenol and tannin content with number of whiteflies/3 leaves in parental lines and crosses. Results revealed negative and highly significant correlation between number of whiteflies/3 leaves and number of jassids/3 leaves. Thus, these parent and hybrids may contribute to produce promising sucking pest tolerant variety/hybrids.

Keywords: biochemical parameters, cotton, gossypol glands, sucking pests, trichomes