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Indian Journal of Entomology
Entomological Society of India
Indian Journal of Entomology

Entomological Society of India

0367-8288

Indian Journal of Entomology/Journal Indian Journal of Entomology
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    Pollination Efficacies of Apis Mellifera L. and Tetragonula Carbonaria (Smith) on Peach

    Tanda Amarjit S
    3页
    查看更多>>摘要：Pollination by Apis mellifera L. and Tetragonula carbonaria(Smith) resulted in enhancing the quality and quantity of peach (Prunus persica L.) significantly. Of a sample of 100 A. mellifera foragers, 65 collected nectar, 23 pollen and 12 both nectar and pollen in peach flowers. Corresponding numbers for wild bees including T. carbonaria were 79, 12 and 9. Insect visitors included honey bees, T. carbonaria, Solenopsis sp., Lasius sp., other wild bees, and butterflies. Abundance of A. mellifera, T. carbonaria, butterflies and Solenopsis sp. was 1.3, 1.1, 0.6, and 0.5, respectively; and time spent/ flower by these was 4.5, 3.7, 1.9, and 1.7 sec, respectively. About maximum numbers of flowers visited/ min by these viz., A. mellifera, T. carbonaria, butterflies and Solenopsis sp. were 11, 7, 9 and 5, respectively. Fruit set on flowers pollinated ones by A. mellifera was found to increase up to 75.34%, and by T. carbonaria to 73.32%, while open naturally pollinated ones gave 61.17% and on self-pollinatedflowers, it was only 49.73%.
      原文链接:
    • NSTL

    ffect of Temperature and CO2 on Lifetable of Diamond Back Moth Plutella Xylostella (L.)

    Haripriya KKennedy J S
    5页
    查看更多>>摘要：The interactive effects of temperature and CO2 on the lifecycle of the diamond back moth Plutella xylostella (L.) have been evaluated in this study. The life history parameters were analyzed using age- stage, and two-sex life table. Results revealed that at elevated temperature there was no complete development, whereas at elevated CO2 the lifecycle gets shortened. The fecundity was maximum (196 eggs/ female) at ambient temperature and elevated CO2 (31°C; 560 ppm); but at elevated temperature and CO2 (35°C; 560 ppm) it got reduced to 100 eggs/ female. The net reproductive rate (R0) was maximum (99.13/ female) at ambient temperature with elevated CO2 (31°C; 560 ppm). The intrinsic rate of increase (rm) was maximum at 0.30/ day CO2 (560± ppm). These results will help to predict the fitness of P. xylostella with climate change.
      原文链接:
    • NSTL

    Diversity of Arthropod Fauna in King Chilli (Capsicum Chinense JACQ.) Ecosystem in Northeast India

    Kadam VThangjam RojeetBorah R K
    7页
    查看更多>>摘要：A field experiment was carried out at the Horticultural Orchard, Assam Agricultural University, Jorhat during rabi (2014-15 and 2015-16) to investigate on arthropod diversity of king chilli. Altogether 110 species were found to be associated, of which19 species were identified as pests, 63 as natural enemies and 27 species as casual visitors. Among the insect pests recorded, Aphis gossypii, Myzus persicae, Bemisia tabaci, Bactrocera latifrons, Scirtothrips dorsalis and Polyphagotarsonemus latus weremajor pests and B. latifrons being reported for the first time causing fruit rot. The relative abundance of pests was higher (54.84%) in 2015-16 compared to 45.16% during 2014-15. Among the natural enemies, 50 species were predators and 13 species wereparasitoids, with most of them being reported for the first time in king chilli. The relative abundance of predators was maximum during 2015-16 (56.41%) compared to 2014-15 (43.59%) and among the parasitoids, hymenopterans exhibited maximum relative abundance (88.89% each). During the study, 27 species of insects were observed as causal visitors and their relative abundance was 46.67 and 53.33% during 2014-15 and 2015-16, respectively.
      原文链接:
    • NSTL

    Sociodemographic Attributes of Beekeepers and Trends of Beekeeping in Bihar#

    Manish KumarVishwakarma Ramanuj
    4页
    查看更多>>摘要：This study on the bee keepers’ socio demographic attributes covered 30 beekeepers growing 7298 bee colonies of Apis mellifera L., hailing from different zones of Bihar. This used a structured questionnaire to know the attributes and trends. The results revealed that beekeeping is mostly practiced by married males, and >53% are aged between 31 to 40 years. About more than two-fifths of beekeepers (43%) had a family size of >5 members, and > three-fifths of the beekeepers (63%) are educated to intermediate level, and about 90% are accomplished with training on beekeeping. More than two-thirds (67%) of them were solely involved in beekeeping activity; and about one-third (33%) possess experience of 16 to 20 years, while other 30% had 6 to 10 years' experience. A total of fourth-fifths (80%) have managed without any kind of financial support. The annual expenditure on/ and income from beekeeping of three-fifths of beekeepers (60%) varied from Rs. 1 to 5 lakh. More than two-fifths beekeepers (43%) heldbee colonies between 101 to 200.
      原文链接:
    • NSTL

    Bionomics of Pink Boll Worm Pectinophora Gossypiella (Saunders) on Cotton and its Alternate Hosts

    Nagamandla Ramya SriMaheswari T Uma
    5页
    查看更多>>摘要：A laboratory experiment was conducted at the Department of Entomology, PJTSAU, Hyderabad on bionomics of pink boll worm Pectinophora gossypiella (Saunders) on cotton and other alternate hosts. Considerable variation in larval period on host plants wasobserved, with the shortest of 18.75± 1.40 days being when reared on okra fruits; and the maximum of24.90± 1.42 days being with Bt cotton. Generally, females lived longer than males on all the host plants, with fecundity being maximum on non Bt cotton(162.5± 10.60 eggs/female) followed by abutilon (132.5± 10.50), Bt cotton (128.5± 10.7) and okra (124.5± 10.90). Duration of lifecycle of female was longest on Bt cotton (47.00± 2.34 days) which was on par with that observed with non Bt cotton (45.70± 2.26 days); but this differed significantly from that observed with abutilon (43.85± 1.60 days) and okra (41.30± 1.75 days). The morphometrics revealed variations in larval, prepupal and pupal measurements- the life stages measure maximum when reared on non Bt cotton; and body size and wing span of female was larger than male. Body length of female was maximum when reared with non Bt cotton (7.17± 0.76 mm) which significantly differed from that obtained with Bt cotton (6.65± 1.43 mm), abutilon(6.59± 0.28 mm) and okra (6.60± 0.39 mm). Similarly, maximum wing span of 14.6± 1.09 mm was observed on non Bt cotton which was on par with okra (13.40± 0.54 mm) and Bt cotton (13.20± 1.27 mm) but significantly differed from abutilon (13.0± 0.17 mm).
      原文链接:
    • NSTL

    Vertical Distribution and Abundance of Aleyrodids of Agricultural Importance In Himachal Pradesh

    Singh VinaySharma GaljravSood Ajay Kumar
    7页
    查看更多>>摘要：Surveys conducted in different locations under open field conditions and protected environment representing different agroecological zones of Himachal Pradesh revealed four aleyrodids viz., Aleurocanthus sp., Bemisia tabaci (Gennadius), Dialeurodes citri Ashmead and Trialeurodes vaporariorum(Westwood) as associated with herbaceous and fruit crops. Aleurocanthus sp. and B. tabaci were prevalent in the submountainous and low-hill subtropical zone (Zone I). Incidence of Aleurocanthus sp. was observed only during summer, abundance being low and associated with host plants belonging to the family Rutaceae. Whereas, B. tabaci was observed under both open as well as protected environment infesting ten host plants belonging to five families. Dialeurodes citri was associated with host plants belonging to the family Rutaceae and was distributed in Zone I and II (mid hills sub- humid zone). It remained active in Zone I throughout year except in winter, whereas, in Zone II it was found active during south-westmonsoon and post-monsoon season only. Trialeurodes vaporariorum was prevalent in Zone II and high-hills temperate wet zone (Zone III) infesting 49 host plants belonging to 23 families under open field conditions and protected structures, respectively. It remained active throughout year in Zone II surviving through winter season on Canadian horseweed Erigeron canadensis (L.) Cronquist under open field conditions. Under protected environment T. vaporariorum remained active throughout year in Zone II andwas prevalent only during summer in Zone III. High hills temperate dry zone (Zone IV) (>2501 masl) remained free of aleyrodid infestation.
      原文链接:
    • NSTL

    Efficacy of Biosynthesised Silver Nanoparticles From Entomopathogenic Fungi Metarhizium Rileyi Against Spodoptera Litura on Cabbage

    Jamunarani G SRamanagoljda S HSatyanarayana C
    6页
    查看更多>>摘要：There is lot of scope for applications of nanotechnology in agriculture. Nanobased insecticide formulations show less toxicity against non-target organisms due to absence of organic solvents. Hence, in this study silver nanoparticles were biosynthesized from Metarhizium rileyi Farl. and the synthesis confirmed initially by colour change from pale yellow to dark brown after seven days. Further, these were characterized using UV-visible spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and EDAX analysis. The surface plasmon resonance peaks were observed at 311 nm and 315 nm in 1.75 and 2.00 mM concentration, respectively. The particle size ranged from 64.11 to 99.08 nm in 1.75 mM and 64.11 to 128.2 nm in 2.00 mMconcentration under SEM. In TEM analysis the particle size ranged from 12.80 to 22.20 nm in 1.75 mM and 11.00 to 19.00 nm in 2.00 mM concentration. The presence of elemental silver was confirmed by signals that ranged from 0 to 10 keV in EDAX analysis. The synthesized nanoparticles were effective in suppressing the Spodoptera litura F. both under laboratory and pot culture experiments. The maximum mortality of80.00 and 53.33% was observed at 1.75 and 2.00 mM under laboratory condition, in the 2nd and 3rd instar larvae, respectively. Whereas, in pot culture the mortality was 73.75 and 78.75% with 1.75- and 2.00-mM concentrations, respectively, as compared to the commercial formulation of M. rileyi and NSKE 4%.
      原文链接:
    • NSTL

    Diversity of Insect Fauna of Onion in Low And Mid-Hill Regions of Himachal Pradesh

    Kaundal PriyankaSood Ajay Kumar
    5页
    查看更多>>摘要：Present survey was undertaken to determine the diversity of insect fauna associated with rabi onion at three crop growth stages in ten localities representing two agroecological zones of Himachal Pradesh during 2018. A total of 13 insect species including ten pestiferous and three beneficial insects from six orders and nine families were observed. The pestiferous insects were Altica sp., Chromatomyia horticola (Goureau), Euconocephalus sp., Gryllus sp., Helicoverpa armigera (Hubner), Melolontha furicicauda Ancey, Nezara viridula L., Spodoptera litura (F.), Thrips tabaci Lindeman and Trichoplusia orichalcea F. and beneficial insects namely, Coccinella septempunctata L., Coccinella transversalis F. and Hippodamia variegata Goeze. Among these, T. tabaci and C. septempunctata were prevalent in all the ten localities during bulb initiation and development stage. Maximum diversity was observed during bulb initiation stage followed by bulb development, and Zone II was more diverse than Zone I; T. tabaci was found to be the dominant species on onion with relative abundance of 96.9%.
      原文链接:
    • NSTL

    Evaluation Of Indigenous Techniques Against Pulse Beetle Callosobruchus Maculatus (F.) In Black Gram

    Swamy S V S GopalaWesley B John
    5页
    查看更多>>摘要：Indigenous techniques viz., match boxes @ 10 no, lime powder @ 15 g, camphor @ 1 g, common salt @ 200 g, cow dung ash @ 80 g, buffalo dung ash @ 80 g, cow dung powder @ 100 g, buffalo dung powder @ 100 g, goat pellet powder @ 100 g/kg grain, gunny soaked in cow urine, gunny soaked in buffalo urine were evaluated as grain protectants against pulse beetle Callosobruchus maculatus (F.) in stored black gram at the Post Harvest Technology Centre, Bapatla. There was no adult emergence and grain damage in the treatments of dung powders besides camphor and ash even after six months. Further, the germination of stored seed kept with camphor, dung ashes and powders were good which ranged between 84.33% and 92.33%. A total of 3622.67 adults emerged from the untreated grain in 180 days of storage and caused 57.67% grain damage which resulted in 4.67% germination only. Besides filling up of inter-grain space, keeping a surface layer of 2.5 cm of powdered materials like ash and cattle dung could prevent pulse beetles successfully.
      原文链接:
    • NSTL

    Population Dynamics of Brinjal Shoot And Fruit Borer Leucinodes Orbonalis Guenee

    Muthiah CRajavel D SVijayalakshmi S H
    3页
    查看更多>>摘要：The seasonal incidence of brinjal shoot and fruit borer Leucinodes orbonalis Guen. was studied at the Regional Research Station, Aruppukottai, Tamil Nadu during 2017-18 and 2018-19. The incidence on the shoot startedin the first week of November peaked in mid-December (52.29%) during 2017-18; while in 2018-19, this initiated in the last week of October peaked in the last week of December (58.54%). The incidence on fruit began in the second week of December with peak in the last week of January (58.20%) during 2017-18; in 2018-19, this began in the second week of December and reached its peak in the first week of February (41.08%). The shoot damage observed during initial periods reduced with fruiting, and exhibited a significant negative correlationwith maximum and minimum temperature. The fruit damage showed an increasing trend during initial periods which reduced later on, and revealed significant positive correlation with weather factors. Thus, the peak infestation was from November to mid-February.
      原文链接:
    • NSTL