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Papers by rupashree das

International Journal of Current Microbiology and Applied Sciences, 2020

Varietal screening of 12 different aromatic rice varieties including check variety pertaining to ... more Varietal screening of 12 different aromatic rice varieties including check variety pertaining to 1% dead heart (DH) and white ear head (WEH) were done at Instructional Cum Research farm, Assam Agricultural University, Jorhat during Kharif 2017 and 2018 under field condition in order to evaluate the resistance/susceptibility reaction against rice stem borer, Scirpophaga innotata Walker. The two year pooled data of stem borer infestation at different intervals (30 and 60 DAT) revealed that no resistant variety was observed against stem borer attack in active tillering stage. However, Kola Joha, Sofguti Joha, Boga Joha, Maniki Joha, Keteki Joha, Ronga Joha and Kon Joha showed Moderately Resistant (MR) reaction during vegetative stage with damage score of “3, while Krishna Joha, Koni Joha, Bokul Joha and Tulsi Bhog Joha showed Moderately Susceptible (MS) reaction and recorded damage score of “5”. Kon Joha and Maniki Joha were considered as Resistant (R) variety at reproductive stage (Sc...

Journal of entomology and zoology studies, 2017

Two species from each genus of Nephotettix and Cofana and one species of Maiestas were studied fr... more Two species from each genus of Nephotettix and Cofana and one species of Maiestas were studied from rice ecosystem of Jorhat, Assam during 2012-2014 and were described based on morphological and male genital characters. Species of Nephotettix can be identified based on shape of vertex, spots present on vertex and forewing and the number of spines present on aedeagal shaft of male genitalia. The Cofana species were identified based on their body size, the numbers of distinctive black spots on vertex and the presence of spines on pygofer. In case of Maiestas species, ocelli was on the anterior margins of vertex and very close to the eyes, forewings with light brown ‘W’ shaped bands which gave a zig-zagged pattern. A simple key for identification of these species in field level was also prepared.

Journal of Asia-Pacific Entomology, 2017

In this study, thirteen species of leafhopper from eight genus belonging to Nephotettix, Maeistas... more In this study, thirteen species of leafhopper from eight genus belonging to Nephotettix, Maeistas, Cofana, Exitianus, Hecalus, Amrasca, Cicadulina, Empoasca were described and prepared simplified key for correct field identification and easy monitoring. Among these thirteen species, Exitianus nanus (Distant, 1908) Exitianus indicus (Distant, 1908) and Hecalus porrectus (Walker, 1858) are being reported for the first time from Assam and described and keyed based on morphological and genital characters. There is no systematic information on genetic diversity of available leafhopper species of Assam and in this paper tried to give a phylogenic species status of nine species of leafhopper based on data of 11 SSR markers.

Varietal screening of 12 different aromatic rice varieties including check variety pertaining to ... more Varietal screening of 12 different aromatic rice varieties including check variety pertaining to 1% dead heart (DH) and white ear head (WEH) were done at Instructional Cum Research farm, Assam Agricultural University, Jorhat during Kharif 2017 and 2018 under field condition in order to evaluate the resistance/susceptibility reaction against rice stem borer, Scirpophaga innotata Walker. The two year pooled data of stem borer infestation at different intervals (30 and 60 DAT) revealed that no resistant variety was observed against stem borer attack in active tillering stage. However, Kola Joha, Sofguti Joha, Boga Joha, Maniki Joha, Keteki Joha, Ronga Joha and Kon Joha showed Moderately Resistant (MR) reaction during vegetative stage with damage score of “3, while Krishna Joha, Koni Joha, Bokul Joha and Tulsi Bhog Joha showed Moderately Susceptible (MS) reaction and recorded damage score of “5”. Kon Joha and Maniki Joha were considered as Resistant (R) variety at reproductive stage (Sc...

International Journal of Current Microbiology and Applied Sciences, 2020

Varietal screening of 12 different aromatic rice varieties including check variety pertaining to ... more Varietal screening of 12 different aromatic rice varieties including check variety pertaining to 1% dead heart (DH) and white ear head (WEH) were done at Instructional Cum Research farm, Assam Agricultural University, Jorhat during Kharif 2017 and 2018 under field condition in order to evaluate the resistance/susceptibility reaction against rice stem borer, Scirpophaga innotata Walker. The two year pooled data of stem borer infestation at different intervals (30 and 60 DAT) revealed that no resistant variety was observed against stem borer attack in active tillering stage. However, Kola Joha, Sofguti Joha, Boga Joha, Maniki Joha, Keteki Joha, Ronga Joha and Kon Joha showed Moderately Resistant (MR) reaction during vegetative stage with damage score of “3, while Krishna Joha, Koni Joha, Bokul Joha and Tulsi Bhog Joha showed Moderately Susceptible (MS) reaction and recorded damage score of “5”. Kon Joha and Maniki Joha were considered as Resistant (R) variety at reproductive stage (Sc...

Journal of entomology and zoology studies, 2017

Two species from each genus of Nephotettix and Cofana and one species of Maiestas were studied fr... more Two species from each genus of Nephotettix and Cofana and one species of Maiestas were studied from rice ecosystem of Jorhat, Assam during 2012-2014 and were described based on morphological and male genital characters. Species of Nephotettix can be identified based on shape of vertex, spots present on vertex and forewing and the number of spines present on aedeagal shaft of male genitalia. The Cofana species were identified based on their body size, the numbers of distinctive black spots on vertex and the presence of spines on pygofer. In case of Maiestas species, ocelli was on the anterior margins of vertex and very close to the eyes, forewings with light brown ‘W’ shaped bands which gave a zig-zagged pattern. A simple key for identification of these species in field level was also prepared.

Journal of Asia-Pacific Entomology, 2017

In this study, thirteen species of leafhopper from eight genus belonging to Nephotettix, Maeistas... more In this study, thirteen species of leafhopper from eight genus belonging to Nephotettix, Maeistas, Cofana, Exitianus, Hecalus, Amrasca, Cicadulina, Empoasca were described and prepared simplified key for correct field identification and easy monitoring. Among these thirteen species, Exitianus nanus (Distant, 1908) Exitianus indicus (Distant, 1908) and Hecalus porrectus (Walker, 1858) are being reported for the first time from Assam and described and keyed based on morphological and genital characters. There is no systematic information on genetic diversity of available leafhopper species of Assam and in this paper tried to give a phylogenic species status of nine species of leafhopper based on data of 11 SSR markers.

Varietal screening of 12 different aromatic rice varieties including check variety pertaining to ... more Varietal screening of 12 different aromatic rice varieties including check variety pertaining to 1% dead heart (DH) and white ear head (WEH) were done at Instructional Cum Research farm, Assam Agricultural University, Jorhat during Kharif 2017 and 2018 under field condition in order to evaluate the resistance/susceptibility reaction against rice stem borer, Scirpophaga innotata Walker. The two year pooled data of stem borer infestation at different intervals (30 and 60 DAT) revealed that no resistant variety was observed against stem borer attack in active tillering stage. However, Kola Joha, Sofguti Joha, Boga Joha, Maniki Joha, Keteki Joha, Ronga Joha and Kon Joha showed Moderately Resistant (MR) reaction during vegetative stage with damage score of “3, while Krishna Joha, Koni Joha, Bokul Joha and Tulsi Bhog Joha showed Moderately Susceptible (MS) reaction and recorded damage score of “5”. Kon Joha and Maniki Joha were considered as Resistant (R) variety at reproductive stage (Sc...