Browsing by Author "V. Manju Vani"

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Bioefficacy of Physical, Chemical and Bio-pesticide Seed Treatment against Pulse Beetle (Callosobruchus chinensis) in Chickpea
(Agricultural Research Communication Centre, 2025) Deepak Kumar Jaiswal; Samantapudi Venkata Satyanarayana Raju; Suresh Choudhary; Sanjay Kumar; V. Manju Vani
Background: The effectiveness of chemical insecticides in comparison to other alternative treatments viz., neem-based biopesticide formulation, chitin synthesis inhibitor, radiation technique and synthetic pyrethroid as seed treatment was studied to manage pulse beetle incidence with a view to determine the best option to prevent seed damage and also to maintain seed quality during storage. Methods: The experiment was carried out under laboratory conditions following completely randomized block design with three replications. Four seed protectant treatments and untreated control was taken to study the effectiveness of the treatments on adult mortality and per cent seed weight loss. The insects were exposed to the treated seeds drawn from the treatment stock at 24, 48, 72, 96 and 120 hours after treatment (HAT). Observations for the study parameters were recorded at 30, 60, 90 and 120 days after storage (DAS) of insects on the treated seeds. Result: The treatment with deltamethrin 2.8% EC @ 1.4 mg a.i./kg seed, diflubenzuron 25% WP @ 1.0 mg a.i./kg seed, neem oil based EC containing Azadirachtin 0.03% @ 6.0 mg a.i./kg seed and UV radiation @ 254 nm exposure for 5 min were found effective against Callosobruchus chinensis in descending order based on adult mortality and per cent seed weight loss. © 2025 , Agricultural Research Communication Centre. All rigths reserved.
Combining ability for yield and quality attributes in tomato (Lycopersicon esculentum Mill.)
(Agri Bio Research Publishers, 2014) B.K. Singh; Anand K. Singh; S.K. Yadav; V. Manju Vani; Harit Kumar; B.V. Rajkumar
Ten diverse lines of tomato were crossed with three testers in line x tester mating fashion to study combining ability effects for yield and yield traits. The parent material was sown to raise F1 during rabi season of 2009-10 and the parents along with F1 were raised in rabi season of 2010-11 at Vegetable Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi. The analysis of variance revealed the predominance of non-additive gene action for all the traits. In respect of both gca and sea effects, the parents and hybrids differed significantly. Among the parents, Potato Leaf, Pant T-7, IC- 177371 and NOTVR- 60 were the best general combiners for improving plant height, yield per plant and other characters under study and these may be used as valuable donors in the hybridization programme for producing promising combinations. Among the crosses, RCMT-2 × VR-20, LCT-6 × VR-20 and Azad-T-5 × VR-20 were the most valuable specific combiners for yield per plant and other characters under study.
Interrelationship between different characters in pea (Pisum sativum L.) using correlation and path coefficient analysis
(Agri Bio Research Publishers, 2014) Chandan Kumar; Anand K. Singh; Harit Kumar; V. Manju Vani; B.V. Rajkumar
The present study was carried out on correlation and path coefficient analysis in 20 diverse genotypes of pea for 12 yield and yield attributing traits. The study on correlation and path coefficient analysis indicated that the genotypic correlations were higher than their corresponding phenotypic level. The phenotypic and genotypic correlations revealed positive and highly significant association for number of pods per plant with pod yield, days to 1st pod initiation, plant height and number of primary branches per plant, while it registered negative and significant correlations with average pod weight, pod length, pod width, number of seeds per pod and average seed weight. Average pod weight recorded positive and significant correlations with pod length, pod width, number of seeds per pod and average seed weight, whereas it showed negative and significant correlations with days to 1st pod initiation, plant height, number of primary branches per plant and protein content. The path coefficient analysis revealed that the number of pods per plant, average seed weight, average pod weight, pod length, days to 50% flowering and plant height had highest positive direct effect on pod yield at phenotypic level, while number of pods per plant, average pod weight, pod length, number of seeds per pod, shelling % and pod width had the highest positive direct effect on pod yield at genotypic level. Hence, selection based on these characters will be effective in formulating selection inside for improvement of high yielding genotypes in pea.
Line x tester analysis for combining ability on yield and yield traits in elite breeding lines of brinjal (Solanum melongena L.)
(Agri Bio Research Publishers, 2014) Ramanand Mishra; Anand K. Singh; V. Manju Vani; Harit Kumar; B.V. Rajkumar
Thirty-six hybrids along with 15 parents (12 lines and three testers) were evaluated for combining ability in brinjal. On the basis of gca effects across eight characters, Punjab Neelam, DBSR-31, Ramnagar Giant, BR-SPS-14, ABSR-2 and Pant Rituraj were identified as most promising parents for inclusion in hybridization programme with the aim to improving fruit yield as well as other important yield and yield contributing characters. The most promising crosses showing high per se performance and significantly positive sca effects for fruit yield and some other important characters were Punjab Neelam x Dudhiya, Punjab Sanyog x Black Beauty, Arka Nidhi x Dudhiya, DBSR-31 x Pant Rituraj, Ramnagar Giant x Dudhiya, BR-SPS-14 x Pant Ritura, Azad Kranti x Dudhiya, Pusa Uttam x Dudhiya, ABSR-2 x Dudhiya, ABSR-2 x Black Beauty and Pant Samrat x Black Beauty. These crosses may exploit in the breeding programme for obtaining transgressive segregants towards developing hybrid varieties.
Studies on life history and host preference of pulse beetle, Callosobruchus chinensis (L.) on different pulses
(Malhotra Publishing House, 2019) Deepak Kumar Jaiswal; S.V.S. Raju; V. Manju Vani; Kamal Ravi Sharma
An investigation on the life history and ovipositional preference of C. chinensis reared on five different pulses revealed not much variation between the pulses. The adults exhibited a marked preference for smooth, well-filled seeds for oviposition. The order of preference for oviposition on different pulses for C. chinensis was Cajanus cajan (red gram) > Vigna radiate (green gram) > Vigna unguiculata (cowpea) > Cicer arietinum (chickpea) > Vigna mungo (black gram). © 2019. All Rights Reserved.