Showing 4 results for Banerjee
Debdulal Banerjee, Aniruddha Singhamahapatra, Subhajit Roy,
Volume 9, Issue 1 (3-2023)
Abstract
Centranthera tranquebarica (Spreng.) Merr. (Orobranchaceae) and Mallotus repandus (Rottler) Müll. Arg. (Euphorbiaceae) are reported as new host plants of Junonia orithya (Linnaeus, 1758) (Nymphalidae) and Rapala manea (Hewitson, 1863) (Lycaenidae) butterflies from Paschim Bardhaman district of West Bengal, India. Schleichera oleosa (Sapindaceae), a deciduous tree, is reported as new host plant of Coladenia indrani (Moore, [1866]) (Hesperiidae) from Bankura district of West Bengal, India. Defensive mechanism of Junonia orithya larva by rolling itself into a tight spiral is also observed.
Jaiswal Deepa, Somesh Banerjee,
Volume 9, Issue 4 (12-2023)
Abstract
The diversity and distribution of aquatic and semi-aquatic Hemipterans were studied from Amrabad and Kawal Tiger Reserve of the state Telangana. This report documents 38 species of aquatic and semi-aquatic hemipterans belonging to 22 genera and ten families from Amrabad and Kawal Tiger Reserve. Interestingly, 20 species were noted as additions to the state of Telangana. Two species Ranatra libera Zettel, 1999 and Rhagovelia sumatrensis Lundblad, 1933 were observed, where both species are new distributional records to peninsular India. Kawal Tiger Reserve (KTR) showed higher species diversity than the Amrabad Tiger Reserve (ATR) with respect to species richness. The present report is the first documentation from both tiger reserves on aquatic and semi-aquatic hemipterans from the state of Telangana.
Volume 26, Issue 2 (3-2024)
Abstract
Exploitation of heterosis is one of the potential means for improvement of sweet pepper (Capsicum annuum var. grossum L.) that can further be utilized for identification of desirable recombinants. Promising hybrids could be acceptable to growers of tropical and subtropical climates if it is a high yielder with attractive fruit colour and blocky shape. Seven diverse parents were selected through multivariate analysis and were crossed in half diallel mating design to determine the extent of heterosis, mode of gene action, combining ability effects, and dominance estimates for 18 quantitative characters. Expression of fruit colour and shape at physiological maturity stage in the F1 generation indicated the dominance of red coloured group over other fruit colour groups and dominance of blocky fruit shape over elongate and round fruit shape. Preponderance of non-additive gene action for most of the characters under study suggested the usefulness of exploitation of hybrid vigour. Three genotypes, 8/4, C/4, and Baby Bell were found most promising donors. The hybrids, Arya×Baby Bell, 8/4×Baby Bell and C/4×8/4 were identified as promising based on per se performance, heterosis manifested, and relevance of specific combining ability effects, for possible commercialization under low cost protected structure of tropical and subtropical climates after critical testing. Partial to over dominance response in inheritance of most traits contributed to the genetic basis of heterosis. Isolation of pure lines from the segregating generation of heterotic hybrids emerged as a promising approach to develop line-bred variety having improved fruit yield and quality.
Volume 26, Issue 3 (5-2024)
Abstract
The agricultural extension system of India has various kinds of service providers like state agriculture departments, universities, research institutes, Farm Science Centers and private players. This study was conducted in 2020 and attempted to explore the association between average annual net income earned from citrus cultivation and the source of availing citrus extension services through Correspondence Analysis (CA) method of 300 citrus farmers selected from three districts in Maharashtra, India. The farmers with high income (1808.31USD to 2411.09USD/ha) received advisory services of the public research institute ICAR-Central Citrus Research Institute (CCRI) through either personal contact or electronic platforms. Awareness about CCRI services, source of seeking citrus cultivation related information, source of purchasing citrus planting material, using CCRI mobile app and website for citrus advisories, and contacting CCRI scientists for solving citrus farming related issues was found to have significant (P< 0.05) positive relationship with net income from citrus farming through Pearsons’ correlation coefficient, while cost of cultivation and orchard age had negative significant relationship. The multi-linear regression analysis, depicted cost of cultivation, awareness about CCRI services, source of seeking citrus advisories, and source of purchasing planting material had significant association with net income. The findings of correlation and regression thus emphasized the positive significant association of CCRI’s extension services to income from citrus farming. Identifying homogenous target groups of citrus farmers through Classification and Regression Tree (CART) method can serve as policy implication for extension service providers to deliver customized need-based advisories to target clientele.
