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Nanda, S. P.
- Torpor in insects
Abstract Views :198 |
PDF Views:77
Authors
Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat 785 013, IN
2 Regional Agricultural Research Station, Karimganj 788 710, IN
3 M.S. Swaminathan School of Agriculture, Centurion University, Paralakhemundi 761 211, IN
4 School of Applied Sciences, Centurion University, Paralakhemundi 761 211, IN
1 Department of Entomology, Assam Agricultural University, Jorhat 785 013, IN
2 Regional Agricultural Research Station, Karimganj 788 710, IN
3 M.S. Swaminathan School of Agriculture, Centurion University, Paralakhemundi 761 211, IN
4 School of Applied Sciences, Centurion University, Paralakhemundi 761 211, IN
Source
Current Science, Vol 120, No 11 (2021), Pagination: 1692-1697Abstract
Sleep is a biologically cyclical episode of brain and body which may be referred to as a behavioural and corporeal condition characterized by change in alertness, decrease in sensitivity to extrinsic stimuli and regulation of homeostasis. Basically sleep is considered to be a key requisite for all organisms including insects. The term ‘Torpor’ is used to denote sleep in insects which is not exactly similar to that of sleep as in case of human beings but is a sleep-like state where the insects remain in a state of decreased physiological activities, reduced body temperature and metabolic rate. The circadian clock and sleep homeostasis are the vital mechanisms known to regulate torpor. However, more precise and minute observations are required for studying the sleep pattern of the insect brain to draw a logistic conclusion on this aspect, which needs further research.Keywords
Circadian Clock, Drosophila melanogaster, Homeostasis, Insects, Torpor.Full Text
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- Pollination Efficiency of Stingless Bee, Tetragonula iridipennis (Smith) on Greenhouse Cucumber, Cucumis sativus (Linnaeus)
Abstract Views :52 |
PDF Views:37
Authors
Sourav Sen
1,
Shimantini Borkataki
2,
Pranjit Sutradhar
3,
Ritu Ranjan Taye
4,
Badal Bhattacharyya
2,
P. S. Saranya
5,
S. P. Nanda
6,
M. Devender Reddy
6
Affiliations
1 Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia 741 252, IN
2 Department of Entomology, Assam Agricultural University (AAU), Jorhat 785 013, IN
3 Department of Agronomy, Assam Agricultural University (AAU), Jorhat 785 013, IN
4 Regional Agricultural Research Station, AAU, Karimganj 788 710, IN
5 Polytechnic of Agriculture, Acharya N.G. Ranga Agricultural University, Garikapadu 521 175, IN
6 M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi 761 211, IN
1 Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia 741 252, IN
2 Department of Entomology, Assam Agricultural University (AAU), Jorhat 785 013, IN
3 Department of Agronomy, Assam Agricultural University (AAU), Jorhat 785 013, IN
4 Regional Agricultural Research Station, AAU, Karimganj 788 710, IN
5 Polytechnic of Agriculture, Acharya N.G. Ranga Agricultural University, Garikapadu 521 175, IN
6 M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi 761 211, IN
Source
Current Science, Vol 125, No 8 (2023), Pagination: 865-870Abstract
The present study deals with the foraging activities and pollination efficiency of Tetragonula iridipennis in cucumber (Cucumis sativus) under protected conditions. Experiments were conducted during two seasons (summer and winter) with three different treatments: open pollination (OP), pollinator exclusion (PE) and stingless bee pollination (SBP) in Assam, North East India. The foraging activity of T. iridipennis was checked in SBP treatment at different timings after installing a 15,504 cm3 beehive. The pollination efficiency of T. iridipennis was also examined among the three selected treatments. The peak period of visitation on cucumber flowers was recorded during 0800-0900 h of the day during both seasons. The yield increase of SBP over PE during both seasons was five times higher. These findings indicate the significance of T. iridipennis as an effective pollinator in greenhouse cucumbers.Keywords
Cucumber, Foraging Activity, Pollination Efficiency, Stingless Bee, Yield.Full Text
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