Refine your search
Collections
Co-Authors
Journals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Nalini, T.
- Toxicity of Selected Insecticides to Mealybug Parasitoids, Aenasius bambawalei Hayat and Aenasius advena Compere (Hymenoptera: Encyrtidae)
Abstract Views :368 |
PDF Views:132
Authors
Affiliations
1 Department of Entomology, Annamalai University, Annamalainagar 608 002, Tamil Nadu, IN
1 Department of Entomology, Annamalai University, Annamalainagar 608 002, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 25, No 1 (2011), Pagination: 14–17Abstract
Safety of selected insecticides to mealybug parasitoids, Aenasius bambawalei Hayat and A. advena Compere (Hymenoptera: Encyrtidae) was evaluated using dry film method at 1, 3, 6, 12, 18 and 24h after treatment (HAT). Results showed that endosulfan, monocrotophos, profenofos and dimethoate caused 100% mortality within 1h in both A. bambawalei and A. advena, which was significantly higher than untreated check. Imidacloprid was comparatively safer and caused 100% mortality of both the sexes of the parasitoids after 3h. However, nimbecidine caused 100% mortality only after 24h indicating that it is the safest of all the insecticides tested for both the parasitoids and hence might be the first choice for mealybug management when parasitoid activity is noticed to give a cumulative effect.Keywords
Insecticides, Toxicity, Dry Film Technique, Bioassay, Aenasius bambawalei, Aenasius advena.References
- Abbott, W. S. 1925. A method of computing the effectiveness of an insecticide. Journal of Economic Entomology, 18: 265–267.
- Alexander, B., Rajavel, D. S. and Suresh, K. 2006. Effect of new Insect Growth Regulators (IGRS) on Trichogramma chilonis Ishii. Hexapoda, 13: 66–69.
- Bloomquist, J. R. 2001. Insecticides: chemistries and characteristics (http:// ipmworld.umn.edu/chapters/ bloomq.htm).
- Consoli, F. L., Parra, J. R. P. and Hassan, S. A. 1998. Side effects of insecticides used in tomato fields on the egg parasitoid Trichogramma pretiosum Riley (Hym., Trichogrammatidae), a natural enemy of Tuta absoluta (Meyrick) (Lep., Gelechiidae). Journal of Applied Entomology, 122: 43–47.
- Hewa-Kapuge, S., McDougall, S. and Hoffmann, A. A. 2003. Effects of methoxyfenozide, indoxacarb, and other insecticides on the beneficial egg parasitoid Trichogramma nr. brassicae Toxicity of selected insecticides to mealybug parasitoids (Hymenoptera: Trichogrammatidae) under laboratory and field conditions. Journal of Economic Entomology, 96: 1083– 1090.
- Jalali, M. A.,Van Leeuwen, T., Tirry, L. and DeClercq, P. 2009. Toxicity of selected insecticides to the two-spot ladybird Adalia bipunctata. Phytoparasitica, 37: 323–326.
- Lowery, D. T. and Isman, M. B. 1995. Toxicity of neem to natural enemies of aphids. Phytoparasitica, 23: 297–306.
- Mani, M. 1992. Contact toxicity of different pesticides to the encyrtid parasitoids, Aenasius advena and Blepyrus insularis of the striped mealybug, Ferrisia virgata. Tropical Pest Management, 38: 386–390.
- Manickavasagam, S. 2010. Faunistic survey of encyrtids in Tamil Nadu and their utilization in the management of mealybug pests of important agricultural and horticultural crops. First year progress report submitted to UGC, New Delhi, India, 24 pp.
- Nagata, K., Iwanaga, Y., Shono, T., and Narahashi, T. 1997. Modulation of the neuronal nicotinic acetylcholine receptor channel by imidacloprid and cartap. Pesticide Biochemistry and Physiology, 59: 119–128.
- Naumann, K. and Isman, M. B. 1996. Toxicity of neem (Azadirachta indica A.Juss.) seed extracts to larval honeybees and estimation of dangers from field application. American Bee Journal, 136: 518–520.
- Olszak, R.W. 1999. Influence of some pesticides on mortality and fecundity of aphidophagous coccinellid Adalia bipunctata L. (Col.: Coccinellidae). Journal of Applied Entomology, 123: 41–45.
- Plapp, F.W.J.R. and Vinson, S.B. 1977. Comparative toxicities of some insecticides to the tobacco bud worm and its ichneumonid parasite, Campoletis sonorensis (Cameron). Environmental Entomology, 6: 381–384.
- Preetha, G., Stanley, J., Suresh, S., Kuttalam, S. and Samiyappan, A. R. 2009. Toxicity of selected insecticides to Trichogramma chilonis: Assessing their safety in the rice ecosystem. Phytoparasitica, 37: 209–215.
- Srinivasa Babu, K. and Sharma, A. K. 2003. Compatibility of a newer insecticide, imidacloprid (Confidor) with propiconazole (Tilt 25EC) against foliar aphids and their coccinellid predators of wheat ecosystem. Indian Journal of Entomology, 65: 287–291.
- Studebaker, G. E. and Kring, T. J. 2003. Effects of insecticides on Orius insidiosus (Hemiptera: Anthocoridae), measured by field, greenhouse and petri dish bioassays. Florida Entomologist, 86: 178–185.
- Tang, Y. Q., Weathersbee, A. A. and Mayer, R. T. 2002. Effect of neem seed extract on the brown citrus aphid (Homoptera: Aphidiidae) and its parasitoid Lysiphlebus testaceipes (Hymenoptera: Aphidiidae). Environmental Entomology, 31: 172–176.
- Vennila, S., Ramamurthy, V. V., Deshmukh, A., Pinjarkar, D. B., Agarwal, M., Pagar, P. C., Prasad, Y. G., Prabhakar, M., Kranthi, K. R. and Bambawale, O. M. 2010. A treatise on mealybugs of Central Indian cotton production system. Technical Bulletin no. 24, National Centre for Integrated Pest Management, New Delhi, India, 39 pp.
- Speech Recognition Based Automated Credit Card Module
Abstract Views :81 |
PDF Views:0
Authors
Affiliations
1 Department of computer Science and Engineering, Bharath University, IN
2 Ramanujam Centre for Computational Intelligence, Bharath University, IN
1 Department of computer Science and Engineering, Bharath University, IN
2 Ramanujam Centre for Computational Intelligence, Bharath University, IN
Source
International Journal of Scientific Engineering and Technology, Vol 2, No 2 (2013), Pagination: 50-55Abstract
This paper presents an approach to the recognition of speech signal using frequency spectral information with Mel frequency for the improvement of speech feature representation in a HMM based recognition approach. The Mel frequency approach exploits the frequency observation for speech signal in a given resolution which results in resolution feature overlapping resulting in recognition limit. Resolution decomposition with frequency mapping approach for a HMM based speech recognition system. The Simulation results show a improvement in the quality metrics of speech recognition wrt. to computational time, learning accuracy for a speech recognition system.Keywords
Speech-Recognition, Mel-Frequencies, Frequency Decomposition, HMM.- Influence of Weaver Ant, Oecophylla smaragdina Fabricius (Hymenoptera: Formicidae) on Mealybug Parasitism by Encyrtids (Chalcidoidea: Encyrtidae)
Abstract Views :258 |
PDF Views:102
Authors
Affiliations
1 Department of Entomology, Annamalai University, Chidambaram - 608002, Tamil Nadu, IN
1 Department of Entomology, Annamalai University, Chidambaram - 608002, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 33, No 3 (2019), Pagination: 303-306Abstract
The influence of Oecophylla smaragdina Fabricius on parasitism of Phenacoccus solenopsis Tinsley and Ferrisia virgata Cockerell by Aenasius arizonensis (Girault) ( = Aenasius bambawalei Hayat) and A. advena Compere were studied under laboratory conditions. The number of surviving A. arizonensis and A. advena was 3.40 and 5.20 at 20th minute, and 1.0 and 0.8 at 60th minute, respectively. Per cent parasitism was 13.60 and 10.00 in treatment with O. smaragdina for A. arizonensis and A. advena, respectively. Per cent mortality due to O. smaragdina attack was 93.33 and 94.67 for A. arizonensis and A. advena, respectively.
Keywords
Aenasius arizonensis, Aenasius advena, Oecophylla smaragdina, Parasitism.References
- Buckley RC.1987. Interactions involving plants, Homoptera, and ants. Ann Ecol Syst. 18: 111–135. https://doi.org/10.1146/annurev.es.18.110187.000551
- Buckley R, Gullan P. 1991. More aggressive ant species (Hymenoptera: Formicidae) provide better protection for soft scales and mealybugs (Homoptera: Coccidae, Pseudococcidae). Biotropica 23: 282-286. https://doi.org/10.2307/2388205
- Carroll CR, Janzen DH. 1973. Ecology of foraging by ants. Annu Rev Ecol Evol Syst. 4: 231–257. https://doi.org/10.1146/annurev.es.04.110173.001311
- Daane KM, Sime KR, Fallon J, Cooper ML. 2007. Impacts of Argentine ants on mealybugs and their natural enemies in California’s coastal vineyards. Ecol Entomol. 32: 583-596. https://doi.org/10.1111/j.1365-2311.2007.00910.x
- Dhawan AK, Saini S, Singh K, Bharathi M. 2008. Toxicity of some new insecticides against Phenacoccus solenopsis (Tinsley) [Hemiptera: Pseudococcidae] on cotton. J Insect Sci. 21: 103–105.
- Hölldobler B, Wilson EO. 1990. The Ants. The Belknap Press of Harvard University Press: Cambridge, MA, USA. p. 732. https://doi.org/10.1007/978-3-662-10306-7
- Jiggins C, Majerus MEN, Gough U. 1993. Ant defence of colonies of Aphis fabae. Br J Entomol Nat Hist. 6: 129–137.
- Mansour R, Gaetana M, Alessandra LP, Kaouthar GL, Agatino RA. 2012. Survey of scale insects (Hemiptera: Coccoidea) and tending ants in Tunisian vineyards. J Plant Prot Res. 51: 197–203.
- Martinez-Ferrer MT, Grafton-Cardwell EE, Shorey HH. 2003. Disruption of parasitism of the California red scale (Homoptera: Diaspididae) by three ant species (Hymenoptera: Formicidae). Biol Control 26: 279-286. https://doi.org/10.1016/S1049-9644(02)00158-5
- Mgocheki N, Addison P. 2009. Interference of ants (Hymenoptera: Formicidae) with biological control of the vine mealybug Planococcus ficus (Signoret) (Hemiptera: Pseudococcidae). Biol Control 49: 108-185. https://doi.org/10.1016/j.biocontrol.2009.02.001
- Nalini T, Manickavasagam S. 2011. Records of Encyrtidae (Hymenoptera: Chalcidoidea) parasitoids on mealybugs (Hemiptera: Pseudococcidae) from Tamil Nadu, India. Check List 7: 510-515. https://doi.org/10.15560/7.4.510
- Noyes JS. 2000. Encyrtidae of Costa Rica (Hymenoptera: Chalcidoidea), 1. The subfamily Tetracneminae, parasitoids of mealybugs (Homoptera: Pseudococcidae). Mem Am Entomol Inst. 62: pp. 355.
- Suresh S, Jothimani R, Sivasubrmanian P, Karuppuchamy P, Samiyappan R, Jonathan EI. 2010. Invasive mealybugs of Tamil Nadu and their management. Karnataka J Agric Sci. 23: 6-9.
- Suresh S, Kavitha PC. 2007. New records of coccoids in India. Proc. XI International Symposium on Scale Insect Studies, Oeiras, Portugal, pp. 24-27. PMid:17408223
- Tanga MC. 2012. Bio-Ecology of the Mango Mealybug, Rastrococcus iceryoides Green (Hemiptera: Pseudococcidae) and its Associated Natural Enemies in Kenya and Tanzania. Ph.D. Thesis, University of Pretoria, Pretoria, South Africa.
- Tanga CM, Ekesi S, Govender P, Nderitu PW, Mohamed SA. 2016. Antagonistic Interactions between the African Weaver Ant Oecophylla longinoda and the Parasitoid Anagyrus pseudococci Potentially Limits Suppression of the Invasive Mealybug Rastrococcus iceryoides. Insects 7: 1-17. https://doi.org/10.3390/insects7010001 PMid:26703741 PMCid:PMC4808781
- Tollerup K, Rust MK, Klotz JH. 2007. Formica perpilosa, an emerging pest in vineyards. J Agric Urban Entomol. 24: 147–158. https://doi.org/10.3954/1523-5475-24.3.147
- Wimp GM, Whitham TG. 2001. Biodiversity consequences of predation and host plant hybridization on an aphid-ant mutualism. Ecology 82: 440–452. https://doi.org/10.2307/2679871