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Lalji Prasad , Rajiv Pandey , Israr A. Ansari , Subhash Chandra

Abstract

The cyclic pattern in the population dynamics of defoliators D. eridantis and P. reflexa of Dalbergia sissoo is governed by delayed density-dependent factors and its growth rate. However , environmental variable particularly humidity and temperature are also influencing the population , since theses are directly affecting the parasitism phenomenon.

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N. Roychoudhury , Subhash Chandra

Abstract

No abstract

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Mohammad Yousuf , S. Sambath , Subhash Chandra

Abstract

To achieve higher rate of parasitisation by egg parasitoids, Trichogramma spp., study was conducted to ensure 100 % mortality of the developing embryo inside the Corcyra cephalonica eggs and arresting the emergence of larvae by applying suitable chilling period to the host eggs. Three hours chilling of Corcyra cephalonica eggs at -8°C and RH 50 ± 10% in refrigerator was found suitable for checking the embryonic development of Corcyra cephalonica eggs and also for maintaining the viability of eggs for parasitisation by Trichogramma spp. Parasitisation in three hours chilled eggs was recorded as high as 94.2% by T. brasiliensis, 93.4% by T.raoi and 92.6% by T.chilonis without hatching of any un-parasitised host egg.

Keywords

Chilling of Eggs, Trichogramma Spp., Embryo, Corcyra cephalonica Viability, Parasitisation

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Subhash Chandra ¹, Amit Jayachandran ¹

Affiliations
1 Management Studies Group Birla Institute of Technology and Science Pilani (Rajasthan)

Abstract

This paper presents an improved multi-goal heuristic for facility layout design problems. The heuristic aims at the minimization of the objective function, which incorporates two factors: qualitative and quantitative. The quantitative factor involves the workflow and rectilinear distance and must be minimized, whereas, the qualitative factor represents the closeness rating and is maximized to obtain the optimal facility layout. The qualitative factor is derived from using the Analytic Hierarchy Process (AHP) for greater meaning and accuracy. Also, the quantification of the qualitative factor with respect to the quantitative factor (by the usage of relative weights) is also obtained using the AHP. An improved heuristic approach is presented which considers all possible permutations of the facility layout to obtain the optimal solution.

Keywords

Facility Layout, Analytic Hierarchy Process

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Yashpal ¹, D. R. Rathod ¹, Jyoti Devi ², Anil Kumar ¹, Keya Mukherjee ¹, Deepika Cheruku ¹, Subhash Chandra ¹, S. K. Lal ¹, Akshay Talukdar ¹

Affiliations
1 Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi 110 012, IN
2 ICAR-Indian Vegetable Research Institute, Varanasi 221 005, IN

Abstract

No Abstract.

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N. Roychoudhury ¹, Subhash Chandra ¹, Ram Bhajan Singh ¹

Affiliations
1 Forest Entomology Division, Tropical Forest Research Institute, Jabalpur, Madhya Pradesh, IN

Abstract

The present paper reports the assessment of damage caused by gall insect Leptocybe invasa Fisher&LaSalle (Hymenoptera : Eulophidae) in eucalyptus. Based on the survey of forest nurseries and plantations of eucalyptus in Madhya Pradesh, the infestations of gall insect revealed wide variations in respect of age of seedlings and saplings. The infestation percentage of L. invasa varied from 20% in one month age of old seedlings and 100% in one year old seedlings in nurseries and 80-100% infestation was recorded in six months old plantations. The intensity of damage was observed to be very severe in seedlings and saplings. The production of galls in relation to early growth of seedlings revealed that there was an increase in number of galls formed irrespective of leaves, petioles and stems. The relative susceptibility to the gall insect varied among seed raised genotype and hybrid eucalyptus, which advocates the differential response of gall wasp in regard to genotype. All these observations clearly indicate that L. invasa is a major gall making insect pest of eucalyptus especially in seedling/sapling stage.

Keywords

Gall Insect, Leptocybe invasa, Eucalyptus, Pest Status, Madhya Pradesh.

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Subhash Chandra ¹, Pankaj Kumar ², Suresh Kumar ²

Affiliations
1 Department of Soil Science and Agriculture Chemistry, N.D. University of Agriculture and Technology, Kumarganj, Faizabad (U.P.), IN
2 Department of Genetics and Plant Breeding, N.D. University of Agriculture and Technology, Kumarganj, Faizabad (U.P.), IN

Abstract

Out of eight fungicides and six neem based products, evaluated in field conditions, propiconazole 25 EC @ 0.1 per cent appeared to be most effective which reduced the disease severity by 86.0 per cent and 86.11 per cent and increased yield by 136.06 per cent and 137.20 per cent in Kharif 2001 and 2002, respectively. Among the six botanicals evaluated as field spray, Neem azal @ 0.3 per cent was found to be most effective and it reduced 79.07 and 80.0 per cent severity of disease and increased 102.07 per cent and 100.94 per cent crop yield in Kharif 2001 and 2002, respectively.

Keywords

Rhizoctonia Solani Kuhn., Sheath Blight, Fungicides, Botanicals.

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M. Shivakumar ¹, V. Nataraj ¹, Giriraj Kumawat ¹, V. Rajesh ¹, Subhash Chandra ¹, Sanjay Gupta ¹, V. S. Bhatia ¹

Affiliations
1 ICAR-Indian Institute of Soybean Research, Indore 452 001, IN

Abstract

In agriculture, conventional breeding takes a longer time for the development of crop varieties with a minimum of 810 years of breeding cycles. In the context of breeding, rapid generation advancement of segregating populations towards reaching homozygosity will facilitate genetic gain for key traits and the rapid development of improved cultivars. Extra-terrestrial experiments by NASA, USA, to grow crop seeds in space inspired scientists in the University of Queensland and University of Sydney in Australia to develop a speed-breeding platform. Speed breeding uses an artificial environment with enhanced light duration to create longer daylight regimes to speed up the breeding cycles of photoinsensitive crops.

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