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Vijaya,
- Effect of Host Stage on Parasitization and Biological Characteristics of Aenasius bambawalei Hayat (Hymenoptera: Encyrtidae), A Parasitoid of Phenacoccus solenopsis Tinsley
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Authors
Affiliations
1 Department of Entomology, Chaudhary Charan Singh, Haryana Agricultural University, Hisar 125 004, Haryana, IN
1 Department of Entomology, Chaudhary Charan Singh, Haryana Agricultural University, Hisar 125 004, Haryana, IN
Source
Journal of Biological Control, Vol 27, No 2 (2013), Pagination: 126-129Abstract
The effect of host stage on parasitisation and biological characteristics of Aenasius bambawalei Hayat (Hymenoptera: Encyrtidae), a parasitoid of Phenacoccus solenopsis Tinsley, was studied under laboratory conditions at 26-31°C and 46-73.6 per cent relative humidity. Mealybugs were reared on sprouted potato tubers and different stages of the pest were used in the host preference studies. Third instar and pre-reproductive adult females of the pest were most preferred by A. bambawalei for parasitization both under choice and no-choice conditions. First instars were not parasitized. Development of both male and female A. bambawalei was faster in large sized hosts (adult females). There was no significant difference in the adult emergence from different host stages. Emergence of adults from different stages ranged from 87.15 to 93.49 per cent. Maximum (73.39%) females emerged from reproductive adult females as compared to other stages of the pest. Parasitoid progeny emerging from second instar hosts consisted mostly (91.23%) of males.Keywords
Aenasius bambawalei, Biology, Host Stage Preference, Solenopsis Mealybug.Full Text
References
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- Ram P, Saini RK. 2010. Biological control of solenopsis mealybug, Phenacoccus solenopsis Tinsley on cotton: a typical example of fortuitous biological control. J Biol Control 24 (2): 104–109.
- Ram P, Saini RK, Vijaya 2009. Preliminary studies on field parasitization and biology of solenopsis mealybug parasitoid, Aenasius bambawalei Hayat (Encyrtidae: Hymenoptera). J Cotton Res Dev. 23 (2): 313–315.
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- Saini RK, Ram P, Sharma SS, Rohilla HR. 2009. Mealybug, Phenacoccus solenopsis Tinsley and its survival in cotton ecosystem in Haryana. In: Proc National Symposium on Bt-Cotton: Opportunities and Prospectus. Central Institute of Cotton Research, Nagpur, November 17–19, 150 pp.
- Vijaya, Ram P, Saini RK. 2011. Biology of Aenasius bambawalei Hayat (Hymenoptera : Eucyrtidae). J Insect Sci. 24: 99–101.
- Gondwana Palynostratigraphy from Drill-Core Studies in Coastal Tamil Nadu and Pondicherry
Abstract Views :193 |
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Authors
Affiliations
1 Birbal Sahni Institute of Palaeobotany, Lucknow-226 007, IN
1 Birbal Sahni Institute of Palaeobotany, Lucknow-226 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 48, No 1 (1996), Pagination: 65-74Abstract
The palynoflora of subsurface coal-bearing sequence in cores from boreholes TC-1 and TC-2 in Kandmanglam and Marakkanam area, Tamil Nadu and Pondicherry Union Territory has been found to be rich in pteridophytic spores. The palyno-assemblage is assignable to the Coptosporo cauveriana Zone of Aptian age. The findings add to our knowledge of Gondwana coal deposits along the east coast of India.Keywords
Palynostratigraphy, Gondwana, Tamil Nadu and Pondicherry.
- Microbial Diversity and Water Quality Index in Temple Ponds of Udupi District, Karnataka, India
Abstract Views :118 |
PDF Views:1
Authors
Affiliations
1 Department of Studies and Research in Microbiology, Mangalore University, Madikeri-571 201, Karnataka, IN
2 Department of Biotechnology, SBRR Mahajana First Grade College, Mysore, Karnataka, IN
1 Department of Studies and Research in Microbiology, Mangalore University, Madikeri-571 201, Karnataka, IN
2 Department of Biotechnology, SBRR Mahajana First Grade College, Mysore, Karnataka, IN
Source
Nature Environment and Pollution Technology, Vol 9, No 1 (2010), Pagination: 197-202Abstract
Microbes in freshwater quite often change its quality and render it unfit for human use. Among these, planktonic algae play a major role. The Canadian Council of Ministers of the environment (CCME) formulated a water quality index (WQI) to facilitate evaluation of surface water quality for protection of aquatic life with specific guidelines. It includes scope (F1), frequency (F2), and amplitude (F3), with a table of values ranging between 0 and 100 determining nature of the index. This index was applied to four temple ponds of Udupi district and the surface water in all four was characterized as poor (values ranged between 37 and 40). According to the index the water quality is almost always endangered. The conditions usually deviate from normal levels. The reasons for this is the variation in total acidity, dissolved oxygen, free carbon dioxide and the overgrowth of bacteria. About 17 algal species and 7 fungal species occurred in these ponds. The reasons for the varied conditions may be attributed to the fluctuation of the number of the devotees visiting the ponds during festival seasons.Keywords
Microbial Diversity, Water Quality Index, Temple Ponds, Udupi District.Full Text
- Management By Objectives
Abstract Views :150 |
PDF Views:0
Authors
Vijaya
1
Affiliations
1 CSI, JACON, Madurai, IN
1 CSI, JACON, Madurai, IN
Source
International Journal of Nursing Education and Research, Vol 2, No 3 (2014), Pagination: 264-265Abstract
Management by Objectives (MBO) was introduced by Peter Drucker in 1954.
It is a Two-Way communication. It increases the staff morale. Main focus is on customer care analysis of their needs.
- Influence of Temperature on the Biology of Aenasius arizonensis (Girault) (Hymenoptera: Encyrtidae), a Parasitoid of Solenopsis Mealybug, Phenacoccus solenopsis Tinsley
Abstract Views :313 |
PDF Views:146
Authors
Affiliations
1 Department of Entomology, Chaudhary Charan Singh Haryana Agricultural University, Hisar - 125004, Haryana, IN
1 Department of Entomology, Chaudhary Charan Singh Haryana Agricultural University, Hisar - 125004, Haryana, IN
Source
Journal of Biological Control, Vol 30, No 4 (2016), Pagination: 210-216Abstract
Effect of temperature on the biology of Aenasius arizonensis (Girault) (=Aenasius bambawalei Hayat) (Hymenoptera: Encyrtidae), a parasitoid of solenopsis mealybug, Phenacoccus solenopsis Tinsley, was studied at four constant temperatures viz. 20±1, 25±1, 30±1 and 35±1°C. Mealybugs were reared on sprouted potatoes. The parasitoid completed its development at all the temperatures studied and males developed faster than the females. For males and females, respectively, total development period was 30.56, 24.16, 13.40 and 11.60 days and 34.40, 26.20, 14.88, and 12.04 days at 20±1, 25±1, 30±1 and 35±1°C, respectively. The daily and total fecundity (number of hosts parasitised) was 1.42, 1.82, 3.17, 2.16 and 57.13, 63.15, 65.60, 37.46 at 20±1, 25±1, 30±1 and 35±1°C, respectively. Female parasitoids parasitised mealy bugs on the day of emergence at all the temperatures. At respective temperatures oviposition and post-oviposition periods were 35.86, 33.60, 18.93, 15.53 days and 2.86, 2.26, 2.60 and 2.33 days, respectively. Parasitoid males were short lived as compared to females at all the temperatures. The male and female longevity, respectively, was 23.06, 17.26, 13.20, 10.33 days and 38.66, 34.53, 20.86, 17.86 days at 20±1, 25±1, 30±1 and 35±1°C, respectively. Sex-ratio (male: female) was in favour of female parasitoids (1: 1.1 to 1: 1.2) at all the temperatures. Net reproductive rate (36.41), intrinsic rate of increase (0.155) and finite rate of increase (1.168) were maximum at 30±1°C indicating this temperature to be the most favourable for the development and reproduction of the parasitoid. Males emerged out from the small sized mummies (2.28×1.20mm) whereas; large sized mummies (2.90×1.59mm) yielded mostly the female parasitoids. Males were generally smaller in size (1.26×0.58mm) as compared to female parasitoids (1.84×0.89mm). The results of the present studies could be useful in establishing a mass rearing programme for the parasitoid.Keywords
Aenasius arizonensis, Biology, Phenacoccus Solenopsis, Temperature.Full Text
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- Ram P, Saini RK, Vijaya 2009. Preliminary studies on field parasitization and biology of solenopsis mealybug parasitoid, Aenasius bambawalei Hayat (Encyrtidae: Hymenoptera). J Cotton Res Dev. 23: 313–315.
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