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Sood Pankaj ¹, C. S. Prabhakar ², P. K. Mehta ¹

Affiliations
1 Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, 176062, Himachal Pradesh, IN
2 KVK Mandi, Sundernagar, 175019, Himachal Pradesh, IN

Abstract

A granulosis virus strain infecting Pieris brassicae (PbGV) was isolated from the dry temperate region of Northwestern Himalayas as a potential microbial agent for the management of P. brassicae. Host specificity and safety to parasitoid Cotesia glomerata (L.) revealed high host specificity and safety to the most prevalent natural enemy. Field evaluation of PbGV was carried out alone and in combination with another microbial pesticide formulation pathogenic to lepidopteran pests viz. Bacillus thuringiensis (DIPEL®) and neem seed kernel extract (NSKE) on cole crops (cabbage, cauliflower and broccoli) at two geographically isolated locations viz. Palampur (sub tropical) and Sangla (dry temperate) in Himachal Pradesh, India in order to design ecofriendly management modules in the hill state, which is fast transforming in to organic farming. The studies revealed that the PbGV isolate alone was quite effective against P. brassicae larvae at higher dose of 1.12 × 10¹² OBs/ha per hectare whereas at lower dose of 5.58 × 10" LE/ha, PbGV was effective when combined with Bt or NSKE. Single foliar application of PbGV was sufficient to suppress the pest at higher altitude areas (dry temperate region) while two applications at 15 days interval were needed at low altitude areas. The findings are of great significance for exploitation of its full potential

Keywords

PbGV, Pieris brassicae, Granulosis Virus, Cabbage Butterfly.

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K. S. Chugh ¹, B. N. Datta ², M. S. Amaresan ¹, P. K. Mehta ¹, B. K. Sharma ¹, V. K. Bansal ³

Affiliations
1 Division of Nephrology, IN
2 Division of Pathology, IN
3 Post-graduate Institute of Medical Education and Research, Chandigarh, IN

Abstract

Abstract not Given.

Keywords

No Keywords given

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Gurmeet Kaur ¹, P. K. Mehta ²

Affiliations
1 Centre of Advanced Study in Geology, Panjab University, Chandigarh - 160 01 4, IN
2 Department of Geology, Mohan Lal Sukhadia University, Udaipur, Rajasthan, IN

Abstract

The Jasrapura granitoid intrudes the rocks of Proterozoic Delhi Supergroup in the northern part of the Khetri Copper Belt (KCB), Rajasthan. It forms a lenticular sheet like body, exposed in the core of an NNE-SSW ) trending anticline formed by the Alwar feldspathic quartzite. Quartz, microcline, microcline-perthite, plagioclase and biotite are the main mineral constituents while titanite, magnetite, allanite and epidote occur as accessory minerals. The Jasrapura granitoid has been characterised as peraluminous, I-type, calc-alkaline granite with subordinate granodioritic component. Various petrological and geochemical parameters collectively indicate its fractionation-related petrogenesis from magma generated in the mantle wedge overlying the subduction zone. The calc-alkaline trend of evolution, high K₂O/Na₂O ratios, enriched incompatible trace elements (Rb, Ba, Th, U, etc), flat HREE profiles, low (La/Yb)_N, ratios and high Yb_N values of Jasrapura granitoid compare favourably with the post-Archaean arc granitoids. The trace element tectonic discrimination diagrams and spidergrams suggest an island arc tectonic regime for the Jasrapura granitoid.

Keywords

Jasrapura granitoid, Petrology, Geochemistry, Island Arc Tectonic Regime, Khetri Copper Belt, Rajasthan.

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Gurmeet Kaur ¹, P. K. Mehta ¹

Affiliations
1 Centre of Advanced Study in Geology, Panjab University, Chandigarh - 160 014, IN

Abstract

This is a preliminary report on the detailed petrological and geochemical investigations of Jasrapura, Gorwala and Gothara granitoids, intruding the rocks of Delhi Supergroup in the vicinity of Khetri town (28°00'N; 75°47'E). The field relationships of the granitoids, particularly their intertwinned and overlapping relationship with the mafic magmatic rocks, their common and typical accessory mineral assemblage, their I-type characteristics, and the major, trace and REE geochemistry, all point towards a common mafic magmatic source, fractionation-related petrogenesis and a complex island arc-marginal basin tectonic regime.

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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

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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Rakesh Kumar ¹, P. K. Mehta ¹, Devbrat Singh ¹, Anup Kumar Pandey ¹, Sarvesh Kumar ¹

Affiliations
1 Department of Civil Engineering, M.N.N.I.T Allahabad, 211004, IN

Abstract

Infrastructure development activities in India have increased many folds in recent times. This has resulted in increase in the demand of construction materials like cement, coarse aggregate, fine aggregate etc. Huge quantities of concrete wastes are produced due to demolition of old structures. If recycled aggregate from this waste is used for construction purpose, it will not only make the structures economical and eco-friendly butwill also solve the problem of waste disposal.Recycling old waste concrete by crushing and grading into coarse aggregates for use in new structural concrete is drawing the attention of engineers, environmentalists and researchers since last three decades. In this paper, an attempt has been made to study the compression dispersion behaviour of struts of natural coarse aggregate (NCA) and recycle coarse aggregate (RCA) at different load concentration ratio and aspect ratio. For the study, struts of 450 mm height and 75mm thickness with varying widths starting from 75mm to 450mm, using NCA and RCA concrete, were cast. The testing of struts was carriedout on loading frame of capacity 500 kN. The struts were tested to failure under in-plane compressive load applied through symmetrically placed steel plate (75×75×10) mm at top andbottom of the struts.

Keywords

Recycle Coarse Aggregate, Natural Coarse Aggregate, Struts, Compression Dispersion, Load Concentration Ratio, Aspect Ratio.

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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

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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