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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.Full Text
References
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- 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.Full Text
- 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.Full Text
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