S. Jolly , R. K. Garg , K. J. Kaur , K. R. Yadav , R. K. Sharma , R. M. Kothari

Abstract

Analyses of reducing sugars (RS), starch, cellulose and moisture content from 137 samples of Bamhoo, Dendrocalamus strictus, were carried out during October, 1995 and January, 1996. On dry weight basis, these analyses revealed reducing sugars in 0.2-6.5% range, starch in zero - 15.2% range and cellulose in 44-58% range, except in ten samples, it ranged 60-65%. Analysis of such data qualified sample from Kothi area to be an elite by virtue of its (i) 61% cellulose content, about 10% over the average value and (ii) meager reducing sugars and poor starch content in contrast to a general trend found in the population. The correlation profiles in the population indicated what when high amount of starch was detected, amount of RS too was high, so also cellulose. Conversely, when low amount of starch was detected, amount of RS too was low, so also cellulose. Based on regression analysis, it is hypothesized that starch was probably mobilised to RS which in turn enhanced cellulose synthesis; conversely, meager amount of starch reflected lower levels of RS and in turn lower level of cellulose.

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R. K. Garg , A. K. Pandey , D. Goyal , R. K. Sharma

Abstract

To identify an efficient mycorrhiza for promoting the growth of Eucalyptus tereticornis in nursery, six species of mycorrhizae [Laccaria fraterna (EM-1083), G. fesciculatum, G. mosseae and three VAM consortia dominated by G. mosseae (G. mosseae 85, G. mosseae 88 and G. mosseae 92)] were screened. The screening procedure involved (i) prior to sowing, mycorrhizae application on elite seeds of E. tereticornis in ischolar_main trainer cups at three different geographical locations of India namely Patiala (North India), Choudwar (South-East India) and Sewa (Central East India) containing a potting mix; (ii) allowing germination and growth at 32±2°C in ischolar_main trainer cups, periodic irrigation of seedlings to maintain 30±5% moisture in a greenhouse; and (iii) monitoring the rate of germination, ischolar_main ramification, shoot biomass and general vigour of the seedlings as a function of mycorrhizal infection, 100 days (from sowing until harvesting/transplantation). It was observed that, in nursery studies vis-a-vis control L. fraterna promoted maximum plant biomass at Patiala and Sewa, while G. mosseae 85 at Choudwar. Mycorrhizal strains affected differently at different sites on the basis of height, chlorophyll, and per cent infection.

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R. K. Sharma , Sanjay Sharma

Abstract

The faunal survey conducted in Sone Gharial Sanctuary of Madhya Pradesh during 1996 is reported in this paper. 35 Gharials (Gavialis gangeticus),11 Mugger Crocodiles (Crocodylus palustris), Turtles, Otters, Birds and Insects sighted are described.

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R. K. Sharma , S. S. Sharma

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No abstract

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R. K. Sharma , R. Mathur , Sanjay Sharma

Abstract

The paper reports the annual census record of some reptilian, mammalian, insect and avifauna in the river Chambal falling under National Chambal Sanctuary in Madhya Pradesh. An area of 425 km from Pali to Bhare was surveyed between 25.1.94 to 12.2.94. The complete stretch was divided into eleven sub-stretches and the number of sightings of Gharial, Muggers, Turtles, Dolphins, Otters and Birds were recorded. The survey revealed that in the sanctuary area the number of Gharial and Turtles is plenty followed by Muggers, Dolphins and Otters. The insect fauna was collected from different stretches and were groupwise identified. The hemipteran species dominated in the insect fauna followed by odonates, coleopterans, dipterans and ephemeropterans respectively.

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R. K. Sharma

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No abstract

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J. P. Chandra , R. K. Sharma

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no abstract

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J. P. Chandra , R. K. Sharma

Abstract

Results of a trial conducted on air-layering of deodar branches are reported. The application of Seradix B₃ induced ischolar_maining and 28 percent of the air-layers ischolar_mained while air-layers without the application of Seradix did not ischolar_main.

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R. V. Singh , J. P. Chandra , R. K. Sharma

Abstract

The results of two experiments conducted to study the effect of the depth of sowing on germination of spruce seeds are summarised. In both these experiments the germination percentage decreased as the depth of sowing increased; the decrease being very much marked with sowings done at a depth of 15 mm and more. Deeper sowings delayed germination and the number of days taken for the commencement of germination increased with an increase in the depth of sowing. The results of these experiments show that spruce should be sown as shallow as possible and in no case deeper than to 10 mm.

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J. P. Chandra , R. K. Sharma

Abstract

A study to control damping-off in Chir pine (Pinus roxburghii) seedings, caused by Fusarium spp. was conducted at Solan (India) by using 11 treatments comprising of drenching the Soil and Seed with different concentrations of five fungicides, namely, Mercuric chloride, Brassicol, Captan, Thiram and Dithane M 45. The results, show that none of treatments had any significant effect on germinations of the seed. The drenching of soil with 0.3% Captan solution, or 0.25%. Thiram solutions, or 0.2% Dithane M 45 solution gave significantly better survival of seedlings than other treatments, there being no significant difference in between these three treatments.

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Arvind Kumar , Shiwani Bhatnagar , R. K. Sharma

Abstract

Deltamethrin was found to be most toxic against the larvae of Spilarctia obliqua followed by triazophos, spinosad, chlorpyrifos and fipronil in leaf dip. LC₅₀ of deltamethrin at 12, 24 and 48 hours after treatment (HAT) was 0.008, 0.0001 and 0.00002 per cent respectively through larval dip method. With leaf dip method the LC₅₀ was 0.007, 0.0002 and 0.00002 at 12, 24 and 48 HAT respectively. Being the novel mode of action and safety point of view spinosad was the most promising insecticide which gave the satisfactory control with safety measures, application and environment.

Keywords

Toxicity, Chlorpyrifos, Deltamethrin, Triazophos, Spinosad, Fipronil, Spilarctia obliqua

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