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Articles by R.P. Sharma
Total Records ( 7 ) for R.P. Sharma
  R.P. Sharma , R. Swaminathan and K.K. Bhati
  The field experiment was conducted with a view to study the fluctuation of pest population of Earias vittella (Fab.) and their relation with prevailing weather conditions at Horticulture Farm, Rajasthan College of Agriculture, Udaipur during Kharif 2005 and 2006. The results revealed that borer incidence commenced in the 29th standard week. The peak infestation of plants (91.6%) was observed in 45th standard week. The maximum numbers of larvae (7.5 larvae/10 plants) were recorded in the 42nd standard week. The maximum quantum of damaged fruits on number basis was 54.3% and on weight basis was 54.7% when the crop was 18 weeks old in 42nd standard week. Correlation between pest population and important weather parameters showed that Earias population was negatively correlated with the mean temperature and mean relative humidity but non significantly and negatively correlated with rainfall in terms of larval population and percentage of infested plants.
  R.P. Sharma and C.P. Srivastava
  The present study was undertaken with aim to provide sustainable management of Scutellerid bugs by some IPM components due to major pest of Jatropha through out the world. The field experiments were carried out on Jatropha curcas L. plantation already made at Rajiv Gandhi South Campus, Barkachha, Mirzapur to evaluate damage potential and efficacy of some IPM components against scutellerid bug infesting Jatropha during 2009 and 2010. The experiment on the damage potential of Scutellera nobilis showed an increase in damage with increasing population. Two bugs/plants did not cause significant damage, while 20 bugs per pants resulted in more significant damage than previous one. Two foliar sprays given at monthly interval revealed that lambda-cyhalothrin 5 EC at 25 g a.i. ha-1 and imidacloprid 17.8 SL 100 mL ha-1 were most effective treatments followed by carbosulfan 25 EC at 250 g a.i. ha-1 and monocrotophos 36 SL at 500 g a.i. ha-1. Next effective treatments were spinosad, endosulfan, Beauveria bassiana, Metarhizium anisopliae resulted in moderately reduction in pest population. All Insecticides showed maximum reduction of bug population during 3rd days after treatments in both sprays, whereas in case of botanical and bioagents maximum reduction was noticed during 7th days after treatments in both sprays. Chlorpyriphos 50 EC at 250 g a.i. ha-1 and neem oil (2%) were found least effective and exhibited minimum reduction in bug population as compared to other IPM components.
  R.N. Chatterjee , R.P. Sharma , A. Mishra , M. Dange and T.K. Bhattacharya
  The present study was conducted on six crossbred chicken populations of White Leghorn to estimate variability of microsatellites and their association with egg production traits. Five microsatellite markers located on chromosome 1, 2, 5 and 30 were explored and the association study was performed employing least square-maximum likelihood method. All the microsatellites were found to be polymorphic showing three to six alleles in the population. Genotype and allelic frequency was estimated showing a large variability in different microsatellites. The association study of microsatellite variability with egg production traits showed that only ADL023 microsatellite was significantly associated with egg production upto 64 and 72 weeks and egg weight at 28 weeks of age. Genotype 11, 12, 13 and 23 produced more number of eggs at 64 and 72 weeks of age than the genotype 22. Egg weight was higher in genotype 12, 13 and 23 and lower with genotype 11 and 22.
  R.N. Chatterjee , R.P. Sharma , B.L.N. Reddy , M. Niranjan , Shivaprasad and S.K. Mishra
  The data of G-5 generation of inbred and non-inbred populations of Dahlem Red were utilized in the present study. These populations were originally developed by a regular system of full sib and half sib mating for 5 successive generations. A random mated non-inbred population was also maintained. Consequently, 3 sub populations have been developed from the same base population, namely, a full sib mated group (FS), a half sib mated group (HS) and a non-inbred group (NB). The inbreeding coefficient in the G-5 generation in the FS group and HS groups was 67.2% and 44.9%, respectively. These three sub populations were subjected to PCR-RAPD analysis to observe the genetic distance and similarity between different subpopulations. A total of 41 random primers (decamers) were screened for RAPD analysis, out of which 21 primers amplified the genomic DNA, generated 128 to 4544 bp bands. The Mean Average Percentage Difference (MAPD) varied between 13.22 and 22.20. The MAPD was highest between FS and NB and lowest between HS and FS. The intra-population genetic similarity was highest in FS (0.7139) followed by HS (0.7095) and NB (0.7054) which indicated that FS subpopulation is most uniform. The FS and NB had maximum genetic distance (by both band sharing and band frequency) and FS and HS had lowest genetic distance. The immune response to SRBC was highest in NB group followed by FS and HS groups.
  M. Niranjan , R.P. Sharma , U. Rajkumar , B.L.N. Reddy , R.N. Chatterjee and T.K. Battacharya
  The growth and production performance of 4 chicken varieties developed for backyard farming were evaluated in the present study. The body weights were significantly (p<0.05) varied in 4 chicken varieties. The body weights were significantly higher in C1 and Vanaraja and lower in Gramapriya. The C2 and C1 crosses matured early at the age of 145.72±1.11 and 154.67±0.81 days, respectively. The egg weights were significantly (p<0.05) higher in C1 cross throughout the laying period. The egg weights ranged from 57.06±0.27 g (Vanaraja) to 58.58±0.29 g (C1 cross) and 60.07±0.28 g (Vanaraja) to 61.34±0.35 g (C1 cross) at 40 and 64 weeks of age, respectively. The egg production in C1 cross was significantly (p<0.05) better than Vanaraja and C2 cross at all ages, however the egg production was on par with Gramapriya at 64 and 72 weeks of age. C1 cross has substantial production capabilities as dual purpose bird suitable for rural and backyard farming in the country.
  U. Rajkumar , R.P. Sharma , K.S. Rajaravindra , M. Niranjan , B.L.N. Reddy , T.K. Bhattacharya and R.N. Chatterjee
  A comprehensive study was undertaken to evaluate the egg quality traits in three naked neck genotypes, NaNa (homozygous), Nana (heterozygous) and nana (normal) by utilizing 556 eggs collected at 28, 32, 36 and 40 weeks of age. The overall mean egg weight, shape index and Haugh unit values were 56.41 g, 75.79 and 75.98, respectively. The yolk index, yolk height and yolk colour varied significantly (p<0.01) in three genotypes. All other external and internal egg quality traits were not differed significantly among the genotypes; however Naked neck had better egg quality in almost all the traits. Age had significant (p<0.01) effect on all the traits studied in Naked neck chicken. Haugh unit score was better in 28 week age group. The egg, yolk, albumin and shell weights were positively correlated with the age. The average shell weight and thickness values were 5.07 g and 0.401 mm, respectively, which had no significant variation among the genotypes. The Na gene had marginal effect on all the egg quality traits studied. The better egg quality parameters in naked neck chicken are desirable which indicate the better keeping quality of the eggs and withstand the handling damages.
  R.P. Sharma and C.P. Srivastava
  The present investigation was conducted in Biocontrol laboratory of the Department of Entomology and Agricultural zoology, Institute of Agricultural Sciences, BHU, Varanasi to study growth and development of Pempelia morosalis (Saalm Uller) on Jatropha under laboratory conditions during April 2009 to May 2010. The studies were conducted at constant temperature of 27±2°C and 75% relative humidity. All observations of biological and morphometric parameters were replicated 6 times up to successive three generations results revealed that a single female of Pempelia morosalis laid 41 to 60 eggs during the life span. Eggs were whitish, flat, oval to round, often in groups of 8 to 15. Eggs were hatched into larvae within 5 to 7 days. First and second instar larvae were plain, pale yellowish green colour that were changed to brown during third instar to fifth instar with dorsal longitudinal stripes. Larval development was completed in 25 to 30 days. Pupal period lasted for 7 to 8 days. The newly emerged adult was grey in colour with snout like labial palp in the head with hyaline hindwing. Male was slightly smaller than female with pointed abdominal tip. The average longevity of male and female was 5 to 6 and 7 to 8 days, respectively. Two parasitoids were found on leaf webber larvae i.e., Bracon hebetor (Say) and Tachinid sp. Both parasitoids were successfully completed their biology on 4th instar larvae of P. morosalis. On providing two leaf webber larvae for a pair of B. hebetor, a total of 36 to 49 individual parasitoids were obtained, whereas in case of Tachinid sp., a total of 21 to 37 individual parasitoids were obtained in research study.
 
 
 
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