Journal of environmental biology最新文献

{"title":"Role of CRPs in tasar sector: Present status and future strategies","authors":"V. Mittal, J. Pandey, J. Binkadakatti, R. Khandai, S. Alam, K. Sathyanarayana","doi":"10.22438/jeb/44/3(si)/jeb-16","DOIUrl":"https://doi.org/10.22438/jeb/44/3(si)/jeb-16","url":null,"abstract":"Aim: Employ of CRPs for utilization in tasar sericulture by needy organizations under various government schemes / developmental projects. Methodology: Community Resource Persons were nurtured under ISDS (Integrated Skill Development Scheme) of CSB and MKSP Tasar projects as a sector specialist cadre who works as specialist of knowing the cutting edge technologies of tasar culture and they will bring the theory of change further to unskilled community to build their skills and creating awareness about the new scientific practices of Tasar Sericulture and building their vision and understanding around communes. CRPs were trained collectively by PRADAN and CSB. Selection of beneficiaries, organizing them into Tasar Vikas Samities (TVSs), signing of agreement with beneficiaries, support for developing infrastructure, etc., during early period of the project, to get maximum project output and keep the tribal's interested in Tasar culture, utilization of the existing Tasar food plants in the forest areas/ raised under other schemes, Skill up-gradation, handholding support to the beneficiaries in creating activity groups were the primary activities achieved by engaging Community Resource Persons (CRP). Disease monitoring, technological support, etc., were monitored by these groups of resource person's. Results: A meticulous and customized evaluation programme of the CRPs was accomplished during 2022-23. A total of 479 CRPs nurtured under the special projects in the states of Jharkhand, Bihar, Chhattisgarh, Odisha and West Bengal, were accredited jointly by CTRTI Ranchi, Birsa Agricultural University Ranchi, KVKs and TDF-PRADAN Deoghar at field level. CRPs from 05 states covering 18 districts, 46 blocks, and 248 villages consisting 340 males & 139 females participated in evaluation & accreditation of CRPs. It was found that 36.74 percentage of CRP's had expertise in rearing activities followed by grainage and rearing (33.40%) and grainage (11.27%), however; only 8.56 % of the CRP's had their expertise in post cocoon technology. The results of assessment of Community Resource Persons (CRPs) based on different criteria revealed that the CRP's having expertise in both grainage & rearing scored 35.95 which is highest among the CRP's. Whereas lowest score of 30.65 was noticed with the CRP's who had expertise in Grainage. With respect to different criteria for assessment of the CRP's expertise in Tropical Tasar under the criteria of timeliness and sincerity; CRP's scored 7.07 out of 10 score followed by community mobilization (6.83) & on field technology support (6.79). Interpretation: As Tasar sector has attracted attention of many funding agencies in the recent past, keeping in view the need of horizontal expansion and shortage of manpower with the State Sericulture departments and others parallel institutions, CRPs can play a vital role based on their skill sets for further utilization by needy organizations under various government schemes/developmental p","PeriodicalId":15688,"journal":{"name":"Journal of environmental biology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44314906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temporal variability in foliar protein content and trypsin inhibitory levels in two host trees of tropical Tasar silkworm Antheraea mylitta, Drury","authors":"P. Bhardwaj, V. K. Choudhary, M. S. Alam, S. Acharyya, S. Mazumdar-Leighton, C. R. Babu","doi":"10.22438/jeb/44/3(si)/jeb-14","DOIUrl":"https://doi.org/10.22438/jeb/44/3(si)/jeb-14","url":null,"abstract":"Aim: Variation in total soluble proteins and protease inhibitor levels were investigated to determine nutritional and plant defense status in different leaf types of Terminalia arjuna (Roxb.) Wight and Arn., and Schleichera oleosa (Lou.) Oken, two host tree species of the economically important, non-mulberry Tasar silkworm, A. mylitta. Methodology: Quantitative spectrophotometric assays based on diagnostic amidolytic substrates were conducted to assess serine protease inhibitor activities in young, semi-mature and mature leaf types. A microplate quantification assay for total protein estimations was used with leaf types sampled over a year. Efficacy of total trypsin inhibitor and chymotrypsin inhibitor activities detected in T. arjuna (a primary host plant) was further evaluated on gut extracts of fourth instar A. mylitta and Pieris brassicae L. (a Pierid pest of crucifers) to assess the physiological adaptation of larvae to dietary antifeedants. Molecular provenances with rbcL genes were obtained that are available as NCBI accessions #MN460810 for T. arjuna and #MT010554 for S. oleosa. Results: Intra-specific variations were evident in leaf phenology of two tree species. Generally, young leaf type of both tree species had high levels of total protein and trypsin inhibitory activities, while mature leaf type of T. arjuna had low total protein content and trypsin inhibitor levels. Mature leaf type of S. oleosa had low trypsin inhibitor levels during the months of July and August. Midgut proteases of A. mylitta and P. brassicae were significantly more susceptible (p≤0.05) to both trypsin and chymotrypsin inhibitors detected in young and semi-mature leaf types of T. arjuna than the mature leaf type. Interpretation: In this study, differential inhibition of digestive proteases in A. mylitta and P. brassicae by protease inhibitors from different leaf types of T. arjuna, suggested adaptation to dietary antifeedants. Such reports on nutritional quality, foliar antifeedants, phenology and host plant utilization are relevant for strategies to domesticate the tropical Tasar silkworm, A. mylitta. Key words: Antheraea mylitta, Protease Inhibitors, Terminalia arjuna, Total protein, Tree phenology","PeriodicalId":15688,"journal":{"name":"Journal of environmental biology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48294387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular cloning and development of RAPD-SCAR markers for the selection of thermo-tolerant line of tropical tasar silkworm","authors":"I. G. Prabhu, M. Manjappa, M. M. Baig, N. Kumar, A. Sinha, S. Kutala","doi":"10.22438/jeb/44/3(si)/jeb-24","DOIUrl":"https://doi.org/10.22438/jeb/44/3(si)/jeb-24","url":null,"abstract":"Aim: To develop random amplified polymorphic DNA (RAPD) -sequence-characterized amplified region (SCAR) markers for selecting thermo-tolerant line of tropical tasar silkworm. Methodology: In the environmental chamber, Daba BV cocoons of A. mylitta were exposed to high temperature at 46°C/4 hr for 3 days. After the emergence, genomic DNA was extracted from thermo-tolerant moths and thermo-susceptible pupae. The genomic DNA was amplified using 30 RAPD random decamer primers. The improved RAPD fragments that can differentiate thermo-tolerant and susceptible line of A. mylitta were eluted, cloned in pJET1.2 vector and sequenced. SCAR markers were developed based on the sequence and validated in the subsequent generations. Results: Among 30 RAPD primers, OPK04, OPAJ15 and OPA17 generated polymorphic bands to differentiate thermo-tolerant and susceptible line of A. mylitta. These polymorphic bands were eluted, cloned and sequenced. Sequencing of three cloned fragments revealed that clone PB1 comprised of 1412 bp, clone PB2 comprised of 704 bp and clone PB3 comprised of 931 bp. Sequence specific stable multiplex SCAR markers TT-PB1, TT-PB2 and TT-PB3 were designed and synthesized. PCR amplification was performed using DNA templates of 10 thermo-tolerant and 10 thermo-susceptible samples. SCAR marker TT-PB1 was observed to be more specific to thermo-tolerant line of tropical tasar silkworm and validation with 25 samples each in next generation also supported the specificity of TT-PB1. Interpretation: Among three SCAR markers, TT-PB1 showed more specificity for selecting the thermo-tolerant line of A. mylitta. Therefore, the study provides an effective and precise PCR-based molecular marker system for selecting thermo-tolerant lines in tropical tasar silkworm to overcome seed crop loss due to high temperature stress in tasar rearing hotter zones. Key words: Antheraea mylitta, cloning, RAPD, SCAR m­­­arker, Thermo-tolerance","PeriodicalId":15688,"journal":{"name":"Journal of environmental biology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47883683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of novel tasar cultivation zones and conservation of vanya silkworms in ecologically-restored sites within degraded mined-out areas of Purnapani, Odisha","authors":"V. K. Choudhary, P. Bhardwaj, P. Kar, S. Mazumdar-Leighton, C. R. Babu","doi":"10.22438/jeb/44/3(si)/jeb-18","DOIUrl":"https://doi.org/10.22438/jeb/44/3(si)/jeb-18","url":null,"abstract":"Aim: The aim was to develop tasar cultivation zones by introducing diverse tasar host plant species at mined out sites undergoing ecological restoration for generating sustainable livelihood option for local tribals. Methodology: The site selected for vanya sericulture was an integral part of ecologically restored 250 -acres limestone/dolomite mined out area of Steel Authority of India Limited (SAIL).Tasar cultivation zones were developed by planting saplings of host plant species viz, Terminalia tomentosa (Roxb.) ex DC., Terminalia arjuna Wright & Arn., Terminalia belerica (Gaertn) Roxb, Ziziphus mauritiana Lam., Terminalia chebula Retz. and Syzygium cumini (L.) Skeels. These cultivation zones are currently scattered among nine forest communities that were developed by growing saplings of more than 260 native species of trees and shrubs, besides ground vegetation, using ecosystem approach. Women self-help groups were formed and trained in rearing of tasar silkworms as well as making tasar-based products to ensure continuous practice of tasar silkworm culture at these novel cultivation zones. Results: During early ecological stages of ecosystem redevelopment through restoration of the habitat, it was observed that wild tasar moths laid eggs and silkworms spun cocoons, albeit in very small quantity, indicating suitability of foliage as food for larvae. In the year 2019-2020 alone, an estimated one lakh cocoons were produced from DFLs procured from CTRTI, Ranchi,and sent to the market/stored as seed cocoon. The average income per member of self-help group from sale of tasar cocoons was Rs 7, 855 (INR) annually. Interpretation: The restored ecosystems in the limestone/dolomite mined-out areas of SAIL at Purnapani serve as an excellent model for conservation of Tasar gene pools and sustainable livelihood development that can be replicated elsewhere. Hence, this practise can serve as an excellent model for replication elsewhere. Key words: Biodiversity, Ecological restoration, Livelihood, Mined out areas, Self-help group, Tasar silkworm","PeriodicalId":15688,"journal":{"name":"Journal of environmental biology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49532657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Screening of efficient drought tolerant accessions of Terminalia arjuna plant for sustainable Tasar sericulture production based on biochemical tools","authors":"T. Pandiaraj, H. Yadav, Mr. Manjappa, J. Singh, K. Sathyanarayana, D.K. Singh, P. Yadav","doi":"10.22438/jeb/44/3(si)/jeb-10","DOIUrl":"https://doi.org/10.22438/jeb/44/3(si)/jeb-10","url":null,"abstract":"Aim: Tasar silkworm, Antheraea mylitta, feeds on the foliage of many plant species belonging to different families, but it prefers the foliage of Terminalia arjuna, T. tomentosa and Shorea robusta. The aim of the present study was to screen the drought-tolerant accessions of Arjuna for the successful and sustainable rearing of the Tasar silkworm. Methodology: An investigation was undertaken at the Central Tasar Research and Training Institute, Ranchi during 2016–17 and 2017–18 to study the \"screening of fast-growing drought tolerant accessions of Arjuna for raising block plantations\" by using biochemical tools. Ten accessions (40 saplings from each accession) were selected and allowed to grow for one year. Then, drought treatments were imposed. The experiment was laid out in a factorial completely randomised design (FCRD) with two factors. Two factors were accessions and moisture levels, i.e., control and stress. Results: The experimental result revealed that the T. arjuna accessions differed significantly for total chlorophyll contents under drought stress. Accn. 523, 525 and 135 significantly recorded higher chlorophyll content under drought-stress conditions. Water stress increased the proline concentrations in all accessions of T. arjuna, reaching 3–16 fold over the non-stressed control. Proline level was significantly increased in Accn. 525 followed by 523 and 135 at 7 and 14 days after treatment was imposed. Interpretation: Accessions of T. arjuna plant 525, 523, 123 and 135 can be used as the most drought tolerant accessions under drought conditions with limited leaf yield and quality loss. Key words: Biochemical tools, Chlorophyll, Drought, Proline, Tasar silk, Terminalia arjuna","PeriodicalId":15688,"journal":{"name":"Journal of environmental biology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135842270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of chitosan and chitosan silver nanocomposites against bacterial pathogens of tropical tasar silkworm, Antheraea mylitta Drurry","authors":"K. Madhusudhan, M. Shivakumar, S. Sakshi, V. Gupta, A. H. Naqvi, K.P. Kirankumar, M. Babulal","doi":"10.22438/jeb/44/3(si)/jeb-09","DOIUrl":"https://doi.org/10.22438/jeb/44/3(si)/jeb-09","url":null,"abstract":"Aim: The present research work was carried out to evaluate the effect of commercially available shrimp chitosan and chitosan silver nanocomposites (CSN) on the inhibition of bacterial pathogens of tropical tasar silkworm. Methodology: Synthesis of chitosan silver nanocomposite was by carried by using chemical precipitation method. The synthesized nanocomposites were characterized using different techniques. Further, antimicrobial potential of the chitosan and chitosan silver nanocomposites was evaluated by in vitro inhibition assay. The minimum inhibitory concentration of both chitosan and chitosan nanocomposites was estimated against bacterial pathogens of tasar silkworm. Results: Chitosan at different concentrations showed antibacterial activity against the bacterial pathogens (Bacillus spp., Micrococcus spp., and Serratia spp.) of tropical tasar silkworm under in vitro conditions. The 0.2% concentration of chitosan and CSN was identified as a minimum inhibitory concentration (MIC) against bacterial pathogens. Interpretation: Based on the findings of this study, the 0.2% concentration of CSNs may be considered as minimum inhibitory concentration against bacterial pathogens infecting tropical tasar silkworms. Key words: Bacterial pathogens, Chitosan silver nanocomposites, Tropical tasar silkworm","PeriodicalId":15688,"journal":{"name":"Journal of environmental biology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45251752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Composition of plant growth promoting rhizobacteria in forest and systematic plantations of tasar silkworm food plants and their relationship with soil and leaf nutrients","authors":"M. Manjappa, T. Pandiaraj, R. Ekka, I. G. Prabhu, M. M. Baig, A. Sahay, K. Sathyanarayana","doi":"10.22438/jeb/44/3(si)/jeb-08","DOIUrl":"https://doi.org/10.22438/jeb/44/3(si)/jeb-08","url":null,"abstract":"Aim: To investigate the status of bacterial load and number of isolates of plant growth promoting rhizobacteria in forest and systematic plantation of Terminalia tomentosa and T. arjuna, and their relationship with soil and leaf nutrient levels. Methodology: Soil samples were collected from the rhizosphere of food plants in four tasar silkworm rearing regions of India. Bacterial load of total bacteria, Nitrogen fixing bacteria (NFB), Phosphate Solubilizing Bacteria (PSB) and bacteria grown on King's B media (KBB) was enumerated on specific media by employing serial dilution technique. Based on the colony morphology and cell type, distinct colonies on specific media were counted as isolate. Nutrient levels in soil and leaf samples collected from different plantations were analyzed. Multivariate correlation analysis was performed between PGPR microbial load and isolates with soil physio-chemical parameters and leaf nutrients. Results: The rhizosphere of forest plants possessed the highest total bacterial load, the systematic plantation possessed the highest NFB load, whereas PSB and KBB load was equal in both the plantations. Forest plantations of Keonjhar and Sundergarh regions had the highest number of NFB isolates per rhizosphere soil sample and systematic plantations possessed the highest number of KBB (Keonjhar and Sundergarh regions) and PSB isolates (West Singhbhum region). Positive correlation was observed between PSB load and the number of isolates with soil organic carbon, KBB load with soil electrical conductivity and available potassium, PSB load and KBB isolates with soil available sulphur. NFB and KBB load and their isolates showed positive correlation with leaf N and K content. Interpretation: Results suggest the possibility of improving leaf nutrient quality of tasar silkworm food plants by enriching PGPR microbial load through biofertilizer application. Key words: Rhizobacteria composition, Soil nutrients, Silkworm, Terminalia tomentosa, Terminalia arjuna","PeriodicalId":15688,"journal":{"name":"Journal of environmental biology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47122511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanism of adult emergence in Xanthopimpla pedator (Fabricius)- a major pupal parasitoid of Tasar silkworm","authors":"H. Gadad, D. Prabhu, A. Bhagat, J. Singh, V. Mittal, J. Pandey, S. Kutala","doi":"10.22438/jeb/44/3(si)/jeb-06","DOIUrl":"https://doi.org/10.22438/jeb/44/3(si)/jeb-06","url":null,"abstract":"Aim: The study was conducted to elucidate the mechanism involved in adult emergence behavior of Xanthopimpla pedator a pupal parasitoid of tasar silkworm. Methodology: Behavioral observations were made to study the mechanical approaches used during emergence and SDS-PAGE analysis was carried to know the possibility of proteases in the digestive secretions. Results: The findings of the study suggest that X. pedator uses physical and chemical to achieve safe passage from the host pupae and cocoons. It was observed that during the process of emergence, X. pedator breaks host pupae by means of mandibular action (by biting the pupal shell). Further, it was noticed that to make emergence hole on host cocoon X. pedator found to employ digestive secretion to soften and disintegrate the silken shell, besides it also deploys mandibles to spread out the secretion on intended place of exit hole. SDS-PAGE analysis showed the presence of series of enzymes, possibly involved in cocoon softening. Interpretation: Findings of this study forms the basis that X. pedator, a major pupal parasitoid of tasar silkworm, uses both physical and chemical approaches to achieve safe passage from the host pupae and protective silken cocoon. Key words: Digestive secretion, Mandibular action, Parasitization, Xanthopimpla pedator","PeriodicalId":15688,"journal":{"name":"Journal of environmental biology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41706583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phenology of Eri silkworm Samia ricini (Donovan) in Lower Assam and its impact on upscaling eri seed production","authors":"N. Lalitha, H. Hridya, P. Borpuzari","doi":"10.22438/jeb/44/3(si)/jeb-19","DOIUrl":"https://doi.org/10.22438/jeb/44/3(si)/jeb-19","url":null,"abstract":"Aim: A phenology study on the seed cocoon rearing performance of Samia ricini (Donovan) in different seasons of Lower Assam and subsequent production of disease-free laying was undertaken. Methodology: In each season, four batches of seed cocoon rearing were conducted on eri silkworms of Borduar race (n=100 dfls) which were reared only on the castor, the primary host plant, to eliminate the variability due to different host plants. The data on different seed cocoon rearing and reproductive parameters were recorded for every rearing and pooled season-wise for comparison. Results: The highest seed cocoon yield per dfl was recorded during autumn (215.92±6.24 nos) followed by winter/spring and late monsoon seasons. During autumn, significantly higher ERR% (90.69±1.01) was observed. Grainage operations conducted on the seed cocoons of various seasons revealed ideal dfl to cocoon ratio during autumn (1:3.5) and late monsoon (1:4.2). The percentage of moth emergence was significantly high in autumn (92.27± 2.90), followed by late monsoon (89.07± 5.38). Interpretation: Results evidently indicated that late monsoon and autumn seasons spanning from September to November months can be utilized effectively for large scale eri silkworm seed production in Assam. Key words: Eri silkworm, Phenology, Reproductive performance, Samia ricini, Seed cocoon rearing","PeriodicalId":15688,"journal":{"name":"Journal of environmental biology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47422479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Host selection behavior of tasar silkworm, Antheraea mylitta (Drury) for oviposition","authors":"B. Thirupam Reddy, M. Chandrashekharaiah, S.M. Mazumdar, K. Sathyanarayana, N.B. Chowdary, D. M. Bawaskar, C. Selvaraj, M. S. Rathore","doi":"10.22438/jeb/44/3(si)/jeb-04","DOIUrl":"https://doi.org/10.22438/jeb/44/3(si)/jeb-04","url":null,"abstract":"Aim: Seed production is the backbone of sericulture in India. In order to cater for the increased demand for seed (egg), the already prevailing seed production techniques need to replace with new and robust techniques. Therefore, the present study was designed to understand the oviposition preference of Antheraea mylitta and selected suitable host plants for future improvement of seed production. Methodology: Choice (nylon net cage) and no-choice (earthen cup) experiments were conducted to study the oviposition preference of A. mylitta on Shorea robusta, Terminalia tomentosa, T. arjuna, Ziziphus mauritiana, Careya arborea, Syzygium cumini and Buchanania lanzan. Mated female moths were released freely into the nylon cage to observe their oviposition preference in the choice test. Whereas, half of both fore wings and hind wings of mated female moths were excised and individually placed in an earthen cup for oviposition. The total number of eggs laid on the host plants in both experiments was recorded and analysed. Results: Mated females released freely within the cage have laid the majority of their eggs on the floor and net instead of their host plants. Among the host plants, the highest number of oviposition was recorded on the S. robusta, T. tomentosa and T. arjuna compared to other host plants. The highest number of eggs per moth was observed on T. tomentosa and followed by S. robusta, T. arjuna and Z. mauritiana, and exceeded the numbers of eggs in the control in the no-choice experiment. Interpretation: The study revealed that both S. robusta and T. tomentosa were highly preferred host plants of A. mylitta for oviposition. Therefore, the volatiles or feeding supplements of S. robusta and T. tomentosa may be identified and applied to A. mylitta during rearing and grainage to enhance seed production. Key words: Host plants, Oviposition preference, Sericulture, Tasar silkworm, Terminalia tomentosa","PeriodicalId":15688,"journal":{"name":"Journal of environmental biology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45084532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}