Browsing by Author "Singh, P.S."

Now showing 1 - 6 of 6
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    A study on the bruchid, Callosobruchus chinensis (Linnaeus) : life cycle on Mung bean
    (Malhotra Publishing House, 2023) Chauhan, Rohit; Meena, R.S.; Singh, P.S.; Premkumari, Saswati
    In life cycle study the average durations of pre-oviposition (6.49 � 0.82 h), oviposition (6.53 � 0.73 days), and post-oviposition (2.65 � 0.41 days) were determined. The incubation period was 3.64 � 0.78 days. Total grub period and pupal period were 14.43 � 2.97 days and 5.25 � 0.93 days, respectively. The average lifespan of male adult and female adult were 6.11 � 0.64 days and 9.26 � 0.69 days, respectively. The fecundity was 87.58 � 8.03 eggs which ranged between 76 � 110 eggs/female. Total life cycle was completed in 26 � 39 days with an average duration of 29.43 � 1.84 days in case of male while 28 � 41 days with an average duration of 32.58 � 1.89 days in female. � (2023), (Malhotra Publishing House). All Rights Reserved.
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    Biochemical Factors Associated with Resistance to Spotted Pod Borer, Maruca vitrata (Fabricius) in Green Gram
    (Agricultural Research Communication Centre, 2021) Singh, Sameer Kumar; Singh, P.S.
    Background: Legume pod borer or spotted pod borer, Maruca vitrata is one of the serious insect pest to the green gram, which causes damage mainly at the reproductive phase of the crop growth. The larvae of spotted pod borer are known to cause damage by webbing the leaves, bud, flower and pods together and feed from inside on them. Due to its webbing nature, it is very difficult to enter inside by natural enemies and chemicals cannot directly reach inside webbing. Host plant resistance to insect pests is an economically and ecologically preferred alternative as compared to other pest management tactics, particularly the synthetic pesticides. The present investigation was undertaken to examine the role of certain bio-chemical constituents of the immature pods of green gram in the expression of damage by the spotted pod borer. Methods: The experiments on screening were conducted during the kharif 2014 and 2015 at the Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, (U.P.) to define the occurrence of M. vitrata on 20 promising varieties/ genotypes of green gram. Pods were collected at the immature stage from different varieties/genotypes and biochemical constituents such as total soluble sugar, total chlorophyll, protein were estimated. Result: The maximum protein content was found in genotype IPM 306-6 (36.17 mg/g) and minimum in genotype PM-5 (20.53 mg/g). Highest total sugar content was reported from genotype ML 1256 (16.71 mg/g) and lowest total sugar content was recorded in PM-5 (10.94 mg/g).The phenol content in genotype PM-5 (9.00 mg/g) was significantly higher than others whereas, the minimum phenol content was reported in IPM 306-6 (5.14 mg/g). The higher amount of total chlorophyll content found in genotype IPM 306-6 (3.22 mg/g) and lowest in PM-5 (1.85 mg/g). The significant and positive correlation was observed between M. vitrata larval population, pod damage and protein (r=0.954** and r=0.952**, respectively) and total sugar content (r=0.986** and r=0.986**, respectively) and total chlorophyll content (r=0.994** and r=0.993**, respectively) in immature pods, while, the significant and negative correlation was found between phenol (r=-0.916** and r=-0.919**, respectively). � 2021, Agricultural Research Communication Centre. All rights reserved.
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    Biochemical traits associated with resistance to Whitefly, Bemisia tabaci (Gennadius) in green gram
    (Malhotra Publishing House, 2021) Singh, Sameer Kumar; Singh, P.S.
    Results revealed that maximum population was reported in ML 5 (9.12 whitefly cage-) followed by SM 48(8.45 whitefly cage-1-) and the minimum population was recorded in PM-5 (3.02 whitefly cage-) closely followedby IPM 306-1 (3.51 whitefly cage-). However, the population local check cultivar, HUM-12 was 6.45 whiteflycage-. The biochemical factors like protein, total sugar, phenol and total chlorophyll were estimated in 20promising varieties/ genotypes of green gram. The highest protein content was found in genotype ML 5 (12.77mg g-) and minimum in genotype PM-5 (7.45 mg g-). Maximum total sugar content was reported from genotypeML 5 (07.86 mg g-) and minimum total sugar content recorded in PM-5 (03.34 mg g-). The phenol content ingenotype PM-5 (4.23 mg g-) was significantly higher than others whereas, the minimum phenol content wasreported in ML5 (2.43 mg g-). The higher amount of total chlorophyll content was found in genotype PM-5(3.92 mg g-) and lower in genotype ML 5 (1.30 mg g-). The significant and positive correlation was witnessedbetween B. tabaci population and protein (r=0.976**) and total sugar content (r=0.981**), while, the significantand negative correlation was found between phenol (r = -981**) and total chlorophyll content (r = -978**) � 2021, Journal of Entomological Research.All Rights Reserved.
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    Field screening of certain chickpea genotypes against gram pod borer, Helicoverpa armigera (H�bner)
    (Malhotra Publishing House, 2022) Kumar, Pavan; Singh, P.S.; Saroj, A.K.; Chaitanya, G.; Ramkumar
    Sixteen chickpea genotypes including susceptible Check BG 362 were screened against gram pod borer, Helicoverpa armigera. The mean larval population of H. armigera ranged from 0.69 to 3.22 larvae per five plants in different genotypes. The lowest larval population was recorded in genotype KPG 59 (0.69 larvae/five plants) and highest in genotype L 550 (3.22 larvae/five plants). The genotype RVG 203 recorded significantly lowest per cent pod damage (5.33%) followed by KPG 59 (6.03%) and BG 212 (9.66%). The genotype L550 recorded significantly highest per cent pod damage (31.33%) followed by BG 362 (24.33%) and GG 2 (23.33%). The genotypes RVG 203 (1840 kg/ha), KPG 59 (1822 kg/ha) produced highest grain yield. The genotype L 550 (8 PSR) recorded significantly highest pest susceptibility rating (PSR) and the lowest pest susceptibility rating was recorded in genotype KPG 59 and RVG 203 i.e 2 PSR � 2022, Journal of Entomological Research.All Rights Reserved.
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    Host Preference and Damage Assessment of Pulse Beetle, Callosobruchus maculatus (Fabricius) (Chrysomelidae: Coleoptera) on Different Hosts
    (Agricultural Research Communication Centre, 2021) Ramesh Babu, S.; Raju, S.V.S.; Singh, P.S.; Sharma, Kamal Ravi
    The host preference of pulse beetle, C. maculatus to selected host grains were evaluated under laboratory conditions in the Department of Entomology and Agricultural Zoology, Banaras Hindu University during the year 2018. Cowpea and green gram were most preferred hosts for C. maculatus in terms of oviposition, per cent survival and mean developmental periods. Red gram and soybean were comparatively less preferred host for oviposition (66.38 eggs/50 seeds and 69.00 eggs/50 seeds respectively) than other host grains. In terms of per cent grain damage (92.25%; 90.19%) and per cent weight loss of grains (76.27%; 75.92%) cowpea and green gram were most preferable hosts respectively after 120 days after insect inoculation. � 2021, Agricultural Research Communication Centre. All rights reserved.
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    Toxicity of selected insecticides against Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae)
    (Malhotra Publishing House, 2023) Chaitanya, Gummadidala; Singh, P.S.; Raju, S.V.S.; Divya, P.
    Among the tested insecticides spinosad 45% SC showed best efficacy at both LC50 and LC99 9 and was more toxic than other insecticides. The LC50 values of spinosad 45% SC to the adults of C. maculatus were 0.0005, 0.0003 and 0.0002% while LC99.9 values were 0.0037, 0.0027 and 0.001% at 24, 48 and 72 h after treatment (HAT), respectively. The log concentration probit (Icp) lines slope (b) values for spinosad 45% SC were 2.634, 2.513 and 3.455 at 24, 48 and 72 HAT, respectively. � 2023 MPH J. ent. Res. All Rights Reserved.