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Chandel, R. S.

• Occurrence and Attack of Hypsipyla robusta Moore on Seeds of Toona ciliata M. Roem - a Report

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Authors

R. S. Chandel , N. P. Bhrot

Source

Indian Forester, Vol 127, No 4 (2001), Pagination: 487-488

Abstract

No abstract

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• Neotectonic Control on Drainage System in Gangetic Plain, Uttar Pradesh

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Authors

I. B. Singh ¹, A. A. Ansari ¹, R. S. Chandel ¹, A. Misra ¹

Affiliations
1 Department of Geology, Lucknow University, Lucknow-226 007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 47, No 5 (1996), Pagination: 599-609

Abstract

Study of remotely sensed data and SOl topographical maps with some field observations has helped in the identification of lineaments controlling the drainages, using various indications like displacement of Siwalik hills, skewness of fan surfaces, preferential alignment of river channel, knick points, distorted meanders, abrupt change in river courses, escarpments and asymmetrical terraces. The northern part of the Gangetic plain, the Piedmont zone shows two major lineaments, i.e. NNE-SSW and NW-SE, developed as conjugate strike slip features, with some evidences of gravity component. The NW-SE direction of the conjugate system is very prominent in Central Alluvial Plain and has controlled the major drainages. These lineaments have caused abrupt change in flow directions of many streams; and in parts, have behaved as gravity fault with NE blocks as downthrown side. The drainage in the Marginal Alluvial Plain (southern part) is essentially controlled by the reactivated basement lineaments of predominantly SW-NE direction. The drainage of northern and central part of Gangetic plain is controlled by newly developed lineaments formed due to compressional stresses of the Himalaya while drainage in southern part is controlled by reactivated basement lineaments.

Keywords

Neotectonics, Drainage, Lineaments, Gangetic Plain, Uttar Pradesh.

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• Occurrence of Entomopathogenic Fungus, Beauveria bassiana (Bals.) on Potato Whitegrubs in Himachal Pradesh

Abstract Views :207  |  PDF Views:3

Authors

R. S. Chandel ¹, Monika Kalia ¹, Saurbh Soni ¹, P. K. Mehta ¹

Affiliations
1 Department of Entomology, CSK HPKV Palampur, 176062, HP, IN

Source

Himachal Journal of Agricultural Research, Vol 41, No 2 (2015), Pagination: 151-155

Abstract

Survey to isolate and identify the entomopathogenic fungi associated with whitegrubs was conducted in Himachal Pradesh during 2008 and 2009. The whitegrubs were collected from 14 locations and Beauveria bassiana (Bals.) was found to be associated with grubs of Brahmina coriacea (Hope) in Shillaroo and Kheradhar areas. The fungus infected grubs were observed only in higher hills of Shimla and Sirmour districts. At Shillaroo, 0.98% grubs of B. coriacea were observed to have fungal infection, whereas at Kheradhar 20.2% of the grubs showed symptoms of mycosis. When field collected grubs were reared separately location- wise in laboratory, very high percentage of mycosis (55.29%) was recorded. Kheradhar and Shillaroo populations of whitegrubs showed white muscardiane infestation in 8.72 and 5.27% of the grubs, respectively. Conidia of the fungus were globose to subglobose measuring 2.0-3.0×2.0-2.5 μm. Incubation of Shillaroo, Kheradhar, Kharapathar and Solan isolates was done at 20, 22 and 26 °C. After 15 days, the radial growth of Shillaroo isolate of B. bassiana was recorded to be 7.66 cm as compared to 7.60, 7.60 and 7.36 cm for Kharapather, Solan and Kheradhar isolates, respectively.

Keywords

Beauveria bassiana, Brahmina coriacea, Entomopathogenic Fungi, Whitegrubs.

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• Prediction of Wire Feed Speed from AC Submerged ARC Welding Parameters

Abstract Views :233  |  PDF Views:5

Authors

R. S. Chandel ¹

Affiliations
1 Centre of Mineral and Energy Technology, Physical Metallurgy Research Laboratories , Ottawa, CA

Source

Indian Welding Journal, Vol 19, No 3 (1987), Pagination: 234-236

Abstract

The effect of welding current, arc voltage, electrode diameter, electrical stickout and flux type on the wire feed speed during AC submerged-arc-welding has been studied. The results show that wire feed speed is influenced by welding current, electrode diameter and electrical stickout. A mathematical model to predict wire feed speed from welding parameters has been developed from the data.

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• Resistance Spot Welding of Mild Steel Sheets-A Literature Review (Concluding Part)

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Authors

R. S. Chandel

Source

Indian Welding Journal, Vol 17, No 2 (1985), Pagination: 27-32

Abstract

There are many techniques for assessing the properties of spot welds, for example, destructive vs. nondestructive tests; qualitative vs. quantitative tests; tests for quality control vs. information for design; static vs. dynamic tests; and shear vs. tension tests etc.

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• Multidimensional Association Rules Extraction in Smoking Habits Database

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Authors

Shashank Swami ¹, R. S. Thakur ², R. S. Chandel ³

Affiliations
1 MP Bhoj University, Bhopal, IN
2 MaNIT, Bhopal, MP, IN
3 Geetanjali Girls College, Bhopal, MP, IN

Source

International Journal of Advanced Networking and Applications, Vol 3, No 3 (2011), Pagination: 1176-1179

Abstract

Aiming at the smoking habits of youth in India, we collected the data from a survey, on which we form the multidimensional association rule and its model of smoking habits. Multidimensional association rule field of data mining is applied to discover the various habits and circumstances in smoking habits of youth. Based on the above approach we can take some preventive measures to reduce the various habits of smoking in youths.

Keywords

Smoking Habit, Data Mining, Multidimensional Association Rule.

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• Susceptibility of White Grub, Brahmina coriacea (Hope) Infesting Potato to Local Strains of Beauveria brongniartii (Saccardo) in Himachal Pradesh

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Authors

Saurbh Soni ¹, P. K. Mehta ¹, R. S. Chandel ¹

Affiliations
1 Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalya, Palampur - 176062, Himachal Pradesh, IN

Source

Journal of Biological Control, Vol 32, No 1 (2018), Pagination: 41-47

Abstract

Brahmina coriacea (Hope) is the most widely distributed and destructive species of white grubs having potential to inflict 40-50 per cent yield losses to potato in Himachal Pradesh. The efficacy of two local isolates of Beauveria brongniartii (KH I and KH II) was evaluated against grubs of B. coriacea by dip treatment and oral feeding methods. Against first and second instar grubs, KH I in dip treatment proved to be highly effective, whereas for third instar grubs, KH I through oral feeding showed higher virulence. The LC₅₀ values for first instar grubs for KH I and KH II were 2.55×10⁵ conidia/ml and 2.80×10⁵ conidia/ml in dip treatment, whereas in oral feeding method, the LC₅₀ values were 7.27×10⁵ conidia/ml and 9.69×10⁵ conidia/ml, respectively. Against second instar grubs, LC₅₀ values calculated were 2.91×10⁵ conidia/ml and 3.98×10⁵ conidia/ml for KH I and KH II in dip treatment, whereas corresponding values through oral feeding method were 5.36×10⁵ conidia/ml and 8.82×10⁵ conidia/ml. LC₅₀ values for third instar grubs were 4.47×10⁵ conidia/ ml and 4.88×10⁵ conidia/ml for KH I and KH II in dip treatment, whereas through oral feeding, LC₅₀ values were 3.03×105 conidia/ml and 5.14×10⁵ conidia/ml for KH I and KH II, respectively.

Keywords

Brahmina coriacea, Beauveria brongniartii, Himachal Pradesh, Potato, Susceptibility.

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• Hardfacing for Mining and Mineral Processing Industries

Abstract Views :241  |  PDF Views:4

Authors

R. S. Chandel ¹

Affiliations
1 Division of Materials Engineering, School of Applied Science Nanyang Technological University, Singapore-639798, SG

Source

Indian Welding Journal, Vol 33, No 2 (2000), Pagination: 30-34

Abstract

Wear is the most important cause of component material loss and degradation in mining and mineral processing operations. Such degradation necessitates substantial maintenance effort along with scheduled and unscheduled interruptions in production.

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• Welding As a Hardfacing Process For Mining And Mineral Processing Industry

Abstract Views :211  |  PDF Views:4

Authors

R. S. Chandel ¹

Affiliations
1 Division of Material Engineering, School of Applied Science, Nanyang Technological University, Singapore - 639798, IN

Source

Indian Welding Journal, Vol 33, No 3 (2000), Pagination: 39-44

Abstract

This is the second article in this series. This article discusses the fusion welding processes that are suitable for depositing hardfacings. These will be described with respect to their operating characteristics, consumable availability for these processes and the metallurgical characteristics of these deposits. Factors influencing the process selection will also be discussed.

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• Hardfacing Consumables and their Characteristics for Mining and Mineral Processing Industry

Abstract Views :199  |  PDF Views:6

Authors

R. S. Chandel ¹

Affiliations
1 Division of Materials Engineering, School of Applied Science, Nanyang Technological University - 639798, SG

Source

Indian Welding Journal, Vol 34, No 1 (2001), Pagination: 26-34

Abstract

For a user, the ideal hardfacing deposit is one that will resist all types of wear described earlier. In reality the formulation and selection of consumables is governed by the predominant wear mode and by the economic considerations. These factors have led to the development and availability of a large number of hardfacing consumable compositions in a variety of forms.

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• Slag-Metal Reactions in Submerged Arc Welding:An Overview

Abstract Views :240  |  PDF Views:5

Authors

Zuruzi Bin Abu Samah ¹, R. S. Chandel ¹, T. Sritharan ¹

Affiliations
1 Division of Materials Engineering, School of Applied Science Nanyang Technological University, Singapore 639 798, SG

Source

Indian Welding Journal, Vol 30, No 2 (1997), Pagination: 35-40

Abstract

The requirements placed on welding fluxes and the resulting slag are numerous. For instance the flux and the resulting slag must be able to contribute to arc stability, weld metal alloying, weld metal deoxidation, weld metal protection, ease of slag detach- ability, control of inclusions due to slag entrapment, hence the resulting mechanical properties, control of porosity, facilitating welding in various positions, among others (1, 2, 3). However, these requirements can be better fulfilled only if there is a good understanding of the many reactions occurring simultaneously at the slag metal interface during welding (1). This is because there are extremely complex interconnections between the aforementioned requirements and the reactions occurring at the slag metal interface. The aim of this article, therefore, is to present a simple overview of slag-metal reactions occurring during submerged arc welding.

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• Thermal Requirements of Tuta absoluta (Meyrick) and Influence of Temperature on its Population Growth on Tomato

Abstract Views :287  |  PDF Views:120

Authors

Sarswati Negi ¹, P. L. Sharma ¹, S. C. Verma ¹, R. S. Chandel ¹

Affiliations
1 Department of Entomology, Dr YSP University of Horticulture and Forestry, Nauni, Solan - 173230, Himachal Pradesh, IN

Source

Journal of Biological Control, Vol 34, No 1 (2020), Pagination: 73-81

Abstract

The present study deals with the impact of temperature on development, survival, reproduction and population growth of a recently invaded and the most destructive pest of tomato, Tuta absoluta (Meyrick) with the aim to understand its possible expansion in different agro-climatic zones. Though T. absoluta was able to develop between 15° and 35°C, temperature around 25°-30°C was more suitable. Survival and fecundity were highest at 25°C and lowest at 35°C. Developmental threshold for different developmental stages of the pest varied from 6.2 to 9.5°C, while the thermal constant required by the insect to complete the development from egg to adult emergence was 500 degree-days. Population growth parameters were also influenced significantly by the rearing temperature. Intrinsic rate of increase, net reproductive rate and finite rate of increase was higher at 25° and 30°C as compared to other temperature regimes. The study concludes that T. absoluta can be a serious pest of tomato in mid-hills of north-western Himalayan region and the southern plains of India where temperatures varies between 15-35°C. Furthermore, the developmental threshold values indicate that the pest can develop and survive at temperatures as low as 6-9°C without entering the diapause as long as the food is available.

Keywords

Fecundity, Reproduction, Survival, Temperature, Tuta absoluta.

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• Efficacy of Insecticides as Seed Treatment for The Management of White Grubs

Abstract Views :352  |  PDF Views:0

Authors

Abhishek Rana ¹, R. S. Chandel ¹, K. S. Verma ¹

Affiliations
1 Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN

Source

Himachal Journal of Agricultural Research, Vol 46, No 2 (2020), Pagination: 169-172

Abstract

The efficacy of six insecticides namely chlorpyriphos 20 EC (5.0 ml/kg seed), imidacloprid 17.8 SL (5.0 ml/kg seed), clothianidin 50 WDG (3.5 g/kg seed), thiamethoxam 25 WG (3.5 g/kg seed), bifenthrin 10 EC (2.5 ml/kg seed) and chlorantraniliprole 18.5 SC (2.5 ml/kg seed) as seed treatment was tested against grubs of Melolontha indica Hope under laboratory conditions. Rajmash, Phaseolus vulgaris L. was used as test crop. The experiment was conducted in plastic trays filled with soil and farm yard manure (FYM) in 3:1 ratio. In each tray, ten third instar grubs of M. indica were released and 20 treated rajmash seeds were sown at a depth of about 5 centimeter. The results revealed that plants from chlorantraniliprole 18.5 SC (2.5 ml/kg seed) treated seeds registered least mortality (20.0 %), followed by chlorpyriphos 20 EC (5 ml/kg seed) (21.67 %) at 10 days after sowing (DAS). The grub mortality recorded in seeds treated with chlorantraniliprole 18.5 SC (2.5 ml/kg seed) and chlorpyriphos 20 EC (5 ml/kg seed) was 56.67 and 46.67 per cent, respectively at 20 DAS. Therefore, seed treatment with chlorantraniliprole 18.5 SC (2.5 ml/kg seed) could be another alternative in addition to chlorpyriphos 20 EC (5 ml/kg seed) for effective management of M. indica grubs infesting rajmash under field conditions in high hills of north western Himalaya.

Keywords

Insecticides, Rajmash, Seed Treatment, White Grubs.

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References

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• Spatial distribution of Aphidius matricariae (Haliday) and Myzus persicae (Sulzer) in bell pepper under polyhouse conditions .

Abstract Views :164  |  PDF Views:84

Authors

PRIYANKA SHARMA ¹, SUBHASH CHANDER VERMA ¹, PREM LAL SHARMA ¹, R. S. CHANDEL ²

Affiliations
1 Department of Entomology, Dr. Y S Parmar University of Horticulture and Forestry, Nauni, Solan (HP) 173230, India ., IN
2 Krishi Bhawan, Govt. of HP, Shimla – 171005, Himachal Pradesh, India ., IN

Source

Journal of Biological Control, Vol 35, No 4 (2021), Pagination: 255 - 262

Abstract

The spatial distribution of Aphidius matricariae and Myzus persicae was studied in bell pepper under polyhouse conditions. In the present study, M. persicae and its parasitoid, A. matricariae populations followed negative binomial distribution throughout the season. The variance to mean ratio (σ2 /X), mean crowding (X*), ratio of mean crowding to mean (X*/X), ‘k’ of negative binomial, Taylor’s power equation for M. persicae and A. matricariae were σ² = 6.97X1.531 (R2 = 0.931), and σ² = 4.29X1.282 (R2 = 0.90) during 2018-2019, respectively. Iwao’s patchiness regression was X* = 45.12 + 1.333X (R2 = 0.853), and X* = 5.406 + 1.195X (R2 = 0.767) during 2018-2019, respectively. Optimum number of samples required for the green peach aphid, M. persicae and A. matricariae were 261.1 and 474 at 20% precision level. The present study will be useful for developing a sampling plan of M. persicae and its parasitoid, A. matricariae in bell pepper for its monitoring and management.

Keywords

Aphidius matricariae, green peach aphid, parasitoid, spatial distribution .

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• Laboratory Evaluation of Some Insecticides Against Adults of Brahmina Coriacea (Hope)

Abstract Views :91  |  PDF Views:59

Authors

Radha Koranga ¹, R. S. Chandel ¹, Vasu Mehta ¹

Affiliations
1 Department of Entomology, CSK Himachal Pradesh Agricultural University, Palampur, Himachal Pradesh, IN

Source

Indian Journal of Entomology, Vol 84, No 2 (2022), Pagination: 377-379

Abstract

Five insecticides viz., dimethoate, indoxacarb, flubendiamide, spinosad and fenazaquin were evaluated for their toxicity against beetles of Brahmina coriacea (Hope) using leaf dip and topical application methods. In leaf dip method, LC50 values of these were 8.41, 165.20, 186.66, 246.09 and 460.60 ppm, respectively, while LC90 values were 45.07, 143.71, 1749.55, 1541.82 and 2687.70 respectively. The order of toxicity was dimethoate> indoxacarb> flubendiamide> spinosad> fenazaquin. In topical application method, LC50 values were 69.71, 201.90, 415.42, 474.66 and 492.19 ppm, respectively; and LC90 values were 300.30, 1077.32, 2121.14, 2672.20 and 3083.64 ppm, respectively. The order of toxicity was indoxacarb> dimethoate> flubendiamide> fenazaquin> spinosad. Irrespective of insecticides, leaf dip method of bioassay proved more effective (except indoxacarb).

Keywords

Insecticide, leaf dip, topical application, Brahmina coriacea, Scarabaeidae, toxicity, LC50, LC90, dimethoate, indoxacarb, flubendiamide, spinosad, fenazaquin.

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• Effect of Insecticides on the Oviposition of Brahmina coriacea (Hope)

Abstract Views :120  |  PDF Views:65

Authors

Radha Koranga ¹, R. S. Chandel ¹, Vasu Mehta ¹

Affiliations
1 Department of Entomology, CSK Himachal Pradesh Agricultural University, Palampur 176062, IN

Source

Indian Journal of Entomology, Vol 84, No 4 (2022), Pagination: 827-829

Abstract

Six insecticides were evaluated with Brahmina coriacea (Hope) for their effect on oviposition. Of these chlorantraniliprole was found to be highly effective. The order of toxicity was chlorantraniliprole> bifenthrin> clothianidin> thiamethoxam> chlorpyriphos> imidacloprid. All insecticides at low doses (1.20- 0.15x 10-4 g a.i./ kg soil) induced reduction in oviposition and it was dose dependent. The number of eggs laid ranged from 28.4- 44.8/ 3 females- maximum reduction being with bifenthrin (82.06%), followed by chlorpyriphos (79.28%).

Keywords

Brahmina coriacea, insecticides, toxicity, oviposition, LD₅₀, chlorantraniliprole, bifenthrin, chlorpyriphos, reduction, dose effect, soil application

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