EVALUATION OF ORGANICALLY GROWN COTTON GENOTYPES FOR INSECT PESTS TOLERANCE.
| dc.contributor.advisor | Deshmukh, Dr. S. B. | |
| dc.contributor.author | AHERKAR, SHRADHA SHRIKANT. | |
| dc.date.accessioned | 2023-12-16T23:34:06Z | |
| dc.date.available | 2023-12-16T23:34:06Z | |
| dc.date.issued | 2021-08-21 | |
| dc.description.abstract | The research work entitled, “Evaluation of organically grown cotton genotypes for insect pest tolerance” conducted at Centre of Organic Agriculture Research and Training (COART), Department of Agronomy, Dr. PDKV, Akola during the kharif season 2020-21; was undertaken to study the reaction of cotton genotypes against insect-pest under organic condition as well as to study the correlation between the insect-pest with its associated characters and seed cotton yield. The experiment comprised of 22 cotton genotypes (20 SGF cotton genotypes and one resistant check DHY-286 and one susceptible check DCH-32) which were replicated thrice under Randomized Block Design. The data regarding sucking pest was recorded at 45, 60, 90 and 120 DAS, whereas, per cent bollworm infestation was recorded at 60, 90 and 120 DAS. In the similar way, data of morpho-physiological characters i.e. number of gossypol glands per cm2, hair (trichomes) density per cm2 and chlorophyll content index; data of biochemical characters i.e. total soluble sugar, total nitrogen and crude protein was recorded at 45, 60, 90 and 120 DAS. The observations on yield and yield contributing characters i.e. days to 50 per cent flowering, days to 50 per cent boll bursting, plant height, number of bolls per plant, boll weight, number of sympodia per plant, number of monopodia per plant and seed cotton yield were recorded at maturity stage of the cotton crop. From the present study, it was concluded that, genotypes AKH-9916, AV-C14, DHY-286, AKH 09-5, Nirmal 996 and GA-8004 recorded maximum trichome density per cm2 as well as maximum gossypol glands per cm2, however, on the other hand, less amount of chlorophyll content, total soluble sugar, total nitrogen and crude protein was recorded in these genotypes. These genotypes also recorded least population of aphids, leafhoppers, thrips and less per cent bollworm infestation. Whereas, genotypes GH-8032, DCH-32, Chetna-S1, Raja-954 and Bhakti-245 had tolerant reaction towards whitefly and showed less trichome density per cm2 and less gossypol glands per cm2 but these genotypes recorded higher content of chlorophyll, total soluble sugar, total nitrogen and crude protein. The American cotton varieties AKH 09-5, GH-8001E and Suraj, American cotton hybrid Nirmal 996, desi cotton variety GA-8004 and desi cotton hybrid Namaskar_Gold-81 recorded comparatively higher yield and higher mean values for trichome density per cm2 and gossypol glands per cm2 and lower mean values for chlorophyll content, total soluble sugar, total nitrogen and crude protein under unprotected organic conditions which are desirable from pest tolerance point of view. The correlation studies revealed that, trichome density and gossypol glands had negative and significant correlation with aphids, leafhoppers and thrips but had positive and significant correlation with whitefly. Whereas, total soluble sugar, total nitrogen as well as crude protein had positive and significant correlation with aphids, leafhoppers and thrips but had negative significant correlation with whitefly. On the other hand, the bollworm damage had negative and significant correlation with trichome density. However, positive and significant correlation was also observed between the bollworm damage and chlorophyll content, total soluble sugar, total nitrogen and crude protein. | |
| dc.identifier.citation | AHERKAR, SHRADHA SHRIKANT. (2021). Evaluation of organically grown cotton genotypes for insect pests tolerance. Department of Agricultural Botany, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2021. Print. xv, 129p.. | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810203679 | |
| dc.language.iso | English | |
| dc.pages | xv, 129p. | |
| dc.publisher | Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra. | |
| dc.research.problem | In the present study the researcher has tried to screen the SGF cotton genotypes against sucking pests and bollworm complex tolerance and to estimate the correlation between the sucking pests as well as the bollworm complex tolerance with other yield contributing characters and seed cotton yield. | |
| dc.sub | Genetics and Plant Breeding | |
| dc.theme | The present research deals with the screening of the SGF cotton genotypes against insect pest. | |
| dc.these.type | M.Sc | |
| dc.title | EVALUATION OF ORGANICALLY GROWN COTTON GENOTYPES FOR INSECT PESTS TOLERANCE. | |
| dc.type | Thesis |