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- D. Pujari
- Mrinmoy Das
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Journals
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Bhattacharyya, Badal
- Insect Pest Management in Organic Agriculture
Abstract Views :206 |
PDF Views:0
Authors
Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat Assam, IN
1 Department of Entomology, Assam Agricultural University, Jorhat Assam, IN
Source
International Journal of Plant Protection, Vol 6, No 2 (2013), Pagination: 467-472Abstract
Organic farming is gaining popularity worldwide among the farmers, entrepreneurs, policy makers, scientists and other stackholders as it minimizes dependence on chemical inputs, thus safeguarding quality of natural resources and environment. In organic farming, insect pest pose a major challenge since genetically modified crops and synthetic pesticides are not permitted for use in organic production systems. The underlying principle of integrated pest management (IPM) in organic system of cultivation involves application of ecologically sound practices. Major emphasis is given on use of multiple and various tactics incorporated into the cropping system design to prevent the damage caused by the insect pests. The key strategies of IPM of organic farming are selection of resistance/tolerance varieties, planting trap crops, following crop rotation, conservation of biological agents and soil quality management. However, enhancement of soil quality and cultural practices are sometime found to be insufficient to manage the pest below economic injury level (EIL). In such situations, augmentative release of biological control agent helps in rapid suppression of insect pests. For organic cultivation, biopesticides are used as a last option when the levels of pest population or damage are not acceptable. Since no single practice is effective for all possible insect pests that threaten the crop, a combination of such practices (IPM) is necessary to maintain the pest population below the EIL. These practices when used in a compatible manner could make organic ecosystem unattractive to pest species.Keywords
Insect Pest Management, Organic Agriculture, Preventive Strategies
- Bioecology And Management of Giant African Snail, Achatina Fulica (Bowdich)
Abstract Views :327 |
PDF Views:0
Authors
Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat (assam), IN
2 Department of Soil Science, Assam Agricultural University, Jorhat (assam), IN
1 Department of Entomology, Assam Agricultural University, Jorhat (assam), IN
2 Department of Soil Science, Assam Agricultural University, Jorhat (assam), IN
Source
International Journal of Plant Protection, Vol 7, No 2 (2014), Pagination: 476-481Abstract
Giant African snail (Achatina fulica Bowdich) belongs to the Phylum-Mollusca and Class- Gastropoda. It is known for its destructive nature on cultivated crops wherever it occurs and is one of the world's largest and most damaging land snail pests. The pest is an East African origin, has spread in recent times by travel and trade to many countries. They now widely distributed and no longer limited to their region of origin due to several factors viz., high reproductive capacity, voracious feeding habit, inadequate quarantine management and human aided dispersal. A. fulica can cause serious economic damage on different crops and extensive rasping (scrapping), defoliation, slime trials, or ribbon like excrement is signs of infestation. In recent times, severe outbreak of this pest has been noticed due to some desirable agricultural and gardening practices like minimum tillage practices and straw retention techniques which help in survival of snails and make seedlings more susceptible to damage. This review paper aims to enlighten on taxonomy, distribution, extent of damage, morphology, biology, ecology, homing behaviour, seasonal incidence, nature of damage, host plants of A. fulica and its ecofriendly management strategies.Keywords
Bioecology, Management, Giant African Snail, Achatina fulica- Field Efficacy of Beauveria bassiana (Bals.) Vuill. and Metarhizium anisopliae (Metsch.) Sorok. against White Grubs in Assam
Abstract Views :241 |
PDF Views:129
Authors
Affiliations
1 AINP on White grubs and other Soil Arthropods, Department of Entomology, Assam Agricultural University, Jorhat- 785013, Assam, IN
1 AINP on White grubs and other Soil Arthropods, Department of Entomology, Assam Agricultural University, Jorhat- 785013, Assam, IN
Source
Journal of Biological Control, Vol 22, No 1 (2008), Pagination: 81-84Abstract
In the present study, efforts were made to explore the possibility of using Beauveria bassiana and Metarhizium anisopliae aione or in combination with different insecticides for the management of white grubs in green gram. B. bassiana formulation applied @ 5×1013 conidia ml−1 in combination with imidacloprid 200SL at 48g a.i. ha−1 was found to be effective exhibiting lowest plant mortality (1.66%) and lowest grub population (1.60/pit), which resulted in highest yield of 6,83q ha−1. Likewise M. anisopliae when applied @ 5×1013 conidia ml−1 in combination with imidacloprid 200SL at 48g a.i. ha-1 resulted in lowest plant mortality (2.28%) and grub population (1.12/pit) and highest yield of 6.79q ha-1.Keywords
Beauveria bassiana, Green Gram, Metarhizium anisopliae, White Grub.Full Text
- Dispersal of 32P-labelled Trichogramma Chilonis in Rice Field
Abstract Views :225 |
PDF Views:116
Authors
Affiliations
1 Department of Entomology, Assam Agricultural University. Jorhat-785013 (Assam), IN
2 Division of Entomology, Indian Agricultural Research Institute, New Delhi, 110012, IN
1 Department of Entomology, Assam Agricultural University. Jorhat-785013 (Assam), IN
2 Division of Entomology, Indian Agricultural Research Institute, New Delhi, 110012, IN
Source
Journal of Biological Control, Vol 22, No 2 (2008), Pagination: 267-270Abstract
The dispersal of 32P labelled population of Trichgramma chilonis in rice crop was studied during kharif 2002 and 2003. In the experiments in kharif 2002, radioactivity on the rice leaf folder eggs was detected for a distance of 9-12 metre in southern direction (downwind sector). However, at North (upwind sector), the radioactivity could be detected for up to 3-6 metre range. Likewise, the data on radioactivity of the leaf folder eggs in all four directions clearly indicated that the labelled parasitoids moved more or less evenly for up to a distance of 6-9 metre from the release point during kharif, 2003.Keywords
Dispersal, Radio-labelling, Rice Leaf Folder, Trichogramma chilonis, 32P.Full Text
- Population Fluctuations of Sugarcane Woolly Aphid, Ceratovacuna lanigera Zehntner (Homoptera:Aphididae), and its Natural Enemies in Plant and Ratoon Sugarcane Crops in Assam
Abstract Views :236 |
PDF Views:140
Authors
Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat - 785013, Assam, IN
1 Department of Entomology, Assam Agricultural University, Jorhat - 785013, Assam, IN
Source
Journal of Biological Control, Vol 21, No 2 (2007), Pagination: 241-246Abstract
The seasonal incidence of sugarcane woolly aphid, Ceratovacuna lanigera Zehntner (Homoptera: Aphididae), and its natural enemies was studied at Instructional-Cum-Research (ICR) Farm, Assam Agricultural University (AAU), Jorhat and at Sugarcane Research Station (SRS), Buralikson, Golaghat during 2004-05. Out of five species of natural enemies recorded at ICR Farm, AAU, Jorhat, Eupeodes confrater (Wiedemann), Chrysoperla carnea (Stephens), Coelophora biplagiata (Mulsant) and Dipha aphidivora (Meyrick) had significant positive impact on sugarcane woolly aphid population, while non-significant negative correlation of aphid population was observed with the population of Encarsia flavoscutellum Zehntner. Multiple regression analysis of different natural enemies with the population of C. lanigera showed 89.0 per cent relationship with the aphid population. At SRS, Buralikson, Golaghat, the only observed natural enemy D. aphidivora showed significant positive impact on woolly aphid population.Keywords
Ceratovacuna lanigera, Encarsia flavoscutellum, Population Build Up, Predators, Sugarcane.Full Text
- Molecular Characterization of Potassium Solubilizing Bacteria from Crop Rhizosphere of the North Eastern Region of India
Abstract Views :194 |
PDF Views:84
Authors
Smrita Buragohain
1,
Dhruba Jyoti Nath
1,
Yumnam Bijilaxmi Devi
1,
Badal Bhattacharyya
2,
Samiron Dutta
1
Affiliations
1 Department of Soil Science, Assam Agricultural University, Jorhat 785 013, IN
2 Department of Entomology, Assam Agricultural University, Jorhat 785 013, IN
1 Department of Soil Science, Assam Agricultural University, Jorhat 785 013, IN
2 Department of Entomology, Assam Agricultural University, Jorhat 785 013, IN
Source
Current Science, Vol 114, No 12 (2018), Pagination: 2543-2548Abstract
In this study, isolation and characterization of potassium solubilizing bacteria (KSB) have been carried out which could solubilize a substantial amount of potassium (K) following incubation with mica. Five KSB, isolated from banana and chilli rhizosphere were identified by 16S rDNA sequence analysis. The identified bacteria were Klebsiella sp. and Bacillus cereus. The isolates had K solubilization potential within the range of 76.3–78.42% compared to control along with significant drop in pH (4.62–4.86). The study reveals the exploitation of Klebsiella sp. and B. cereus as potential K solubilizing biofertilizers.Keywords
Crop Rhizosphere, Molecular Characterization, Mica, Potassium Solubilizing Bacteria.Full Text
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- Biswas, D. R. and Basak, B. B., Mobilization of potassium from waste mica by potassium-solubilizing bacteria (Bacillus mucilaginosus) as influenced by temperature and incubation period under in vitro laboratory conditions. Agrochimica LVIII (4), 2014, 309–320.
- Methods of Extraction of Mucin From Giant African Snail Achatina fulica Bowdich
Abstract Views :109 |
PDF Views:69
Authors
Partha Pratim Gyanudoy Das
1,
Badal Bhattacharyya
1,
Sudhansu Bhagawati
1,
Dhruba Jyoti Nath
2,
Kritideepan Sarmah
3
Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat 785013, Assam, IN
2 Department of Soil Science, Assam Agricultural University, Jorhat 785013, Assam, IN
3 Department of Biochemistry and Agricultural Chemistry, Assam Agricultural University, Jorhat 785013, Assam, IN
1 Department of Entomology, Assam Agricultural University, Jorhat 785013, Assam, IN
2 Department of Soil Science, Assam Agricultural University, Jorhat 785013, Assam, IN
3 Department of Biochemistry and Agricultural Chemistry, Assam Agricultural University, Jorhat 785013, Assam, IN
Source
Indian Journal of Entomology, Vol 84, No 2 (2022), Pagination: 296-300Abstract
Achatina fulica Bowdich is one of the most notorious pests in crop fields. However, the mucin secreted by this terrestrial mollusc has magnificent pharmaceutical attributes. In the present study, solvent and mechanical methods were explored to find out the best method of mucin extraction from this gastropod pest under laboratory conditions. In case of both medium and large sized snails, dichloromethane registered the maximum (2.79 ml and 2.94 ml, respectively) mucin collection out of the six solvents tested. Volume wise comparison showed that the maximum amount of mucin recovery was possible in the highest volume (3 ml) of solvents applied for both the age groups. Of all the mechanical methods tested, smoking method yielded maximum (2.05 ml and 3.02 ml) amount of mucin from both medium and large sized snails, respectively. However, the minimum mucin recovery was registered when the snails were allowed to move over rough tiles.Keywords
Achatina fulica, mucin, terrestrial mollusc, pharmaceutical, solvent, mechanical methods, gastropod pest, dichloromethane, smoking method, rough tiles, acharan sulfate.Full Text
References
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- Evaluation of Some IPM Modules Against Red Ant Dorylus Orientalis Westwood in Potato
Abstract Views :72 |
PDF Views:68
Authors
Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat 785013, Assam, IN
1 Department of Entomology, Assam Agricultural University, Jorhat 785013, Assam, IN
Source
Indian Journal of Entomology, Vol 84, No 1 (2022), Pagination: 140-144Abstract
Field experiments were conducted at Charaibahi village, Jorhat, Assam during 2015-17 to evaluate six ecofriendly IPM modules against red ants Dorylus orientalis Westwood in potato. Among the modules evaluated, Module-II (pre sowing treatment of mustard oil cake @ 150 kg/ ha+ wood ash 150 kg/ ha+ panchagavya @ 3% and soil drenching with neem oil @ 5 ml/ lit after 1st and 2nd earthing up (25 and 60 DAS) recorded the lowest tuber damage both in weight (8.65%) and number (10.70%) basis and found at par with the recommended package of practices (RPP) (application of malathion 5% dust @ 40 kg/ ha+ mustard oil cake @ 150 kg/ ha in the soil after 1st and 2nd earthing up) recording 8.18 and 10.20% tuber damage, respectively. The same module also recorded highest tuber yield (119.37 q/ ha) which was at par with the RPP (120.12 q/ ha). The maximum benefit cost ratio (1.41) was recorded in RPP followed by Module-II (1.33) and Module-VI (1.26). The untreated control plot registered a very high level of tuber damage (25.93 and 28.70 on weight and number basis, respectively) having maximum population of red ants (3.95 numbers/ m2 ) with a tuber yield of 89.91 q/ ha.
Keywords
Dorylus orientalis, IPM modules, incidence, tuber damage, panchagavya, neem oil, mustard oil cake, wood ash, malathion, soil drenching, earthing up, yield, cost benefitFull Text
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- Population Dynamics of Red Ant Dorylus Orientalis in Potato Grown Under Flood Free/ Prone Conditions
Abstract Views :100 |
PDF Views:62
Authors
Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat 785013, Assam, IN
1 Department of Entomology, Assam Agricultural University, Jorhat 785013, Assam, IN
Source
Indian Journal of Entomology, Vol 84, No 4 (2022), Pagination: 942-946Abstract
Experiments were carried out in the farmer’s field at Jorhat during 2015-16 and 2016-17 to study the population dynamics of red ant Dorylus orientalis Westwood in potato crop. The incidence of D. orientalis was observed both under flood free/ and prone conditions in three villages each, during potato growing season. These data were correlated with weather factors. The effect on population buildup was studied with observations at fortnightly interval starting from 1st fortnight of October to 2nd fortnight of February through fixed plot surveys. The observations revealed that maximum incidence (36.5, 33.2 and 30.1; 35.2, 32.5 and 29.8/ pit) was observed in Charaibahi, Karangia and Hokai Khangia villages, respectively during the 1st fortnight of January. In contrast, in the flood prone villages, incidence was observed to be negligible. Correlation coefficients of incidence with weather factors revealed that minimum temperature, soil temperature (morning and evening) and evaporation rate show a significantly negative correlation; whereas relative humidity (RH) (morning and evening) exhibited significant positive correlation in flood free villages. In flood prone villages minimum temperature as well as morning soil temperature showed significant negative correlation (2015-16); in contrast, in flood prone villages, RH (morning and evening) showed significant positive correlation (2016-17).Keywords
Dorylus orientalis, population dynamics, fixed plot survey, flood free/ prone, potato, temperature, relative humidity, soil temperature, evaporation rateFull Text
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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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