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Karuppuchamy, P.
- Effect of Adult Nutrition on Longevity and Parasitisation Efficiency of Acerophagus papayae Noyes and Schauff (Hymenoptera: Encyrtidae)
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Authors
Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 25, No 4 (2011), Pagination: 316-319Abstract
The role of adult nutrition on longevity, fecundity and male: female ratio was studied in detail for Acerophagus papayae. There was significant difference in the longevity and parasitisation efficiency of the adults fed different diets. Adults of A. papayae fed on 10% and 50% honey lived for 9.00 and 7.33 days and the number of progeny was 50 and 47.8 numbers with female progenies of 41.56 and 36.37 per cent, respectively. The parasitoids fed with yeast extract along with 10% honey and dried grapes extract lived for an average of 6.00 days and 8.00 days and the number of progeny was 51.06 and 54.93 with 38.36 and 37.29 per cent female progenies respectively. The parasitoid fed with fructose lived for 4.00 days and the the number of progeny was 46.6 and percentage of female progenies was 37.16. But, parasitoids fed with water alone lived for 3.33 days and its parasitisation efficiency was 34.6 with 31.35 per cent of female progeny.Keywords
Papaya,Acerophgus papayae, Adult Nutrition, Efficiency of Parasitism.Full Text
References
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- In vivo Enhancement of Nucleopolyhedrovirus Infection in Helicoverpa armigera (Hübner) by the Granulovirus of Spodoptera litura Fabricius
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PDF Views:144
Authors
Affiliations
1 Department of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
1 Department of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 26, No 3 (2012), Pagination: 234–239Abstract
Biopesticides based on baculoviruses offer great scope as promising viral insecticides against Helicoverpa armigera (Hübner). However, an important limitation in the use of baculoviruses is their reduced efficacy against grown up larvae. The infectivity of NPV against grown up larvae were reported to be enhanced by the presence of a viral enhancing factor (VEF) in granuloviruses (GV). Hence, we investigated the possible interaction of GVs of Spodoptera litura (SlGV), Agrotis segetum (AsGV), Plutella xylostella (PxGV), Achaea janata (AjGV) and Chilo infuscatellus (CiGV) separately with the NPV of H. armigera (HearNPV) against second, third, fourth and fifth instar H. armigera. Of the GVs tested with HearNPV, SlGV alone synergized HearNPV action with reduced LC50 values. The integration of SlGV with HearNPV resulted in 9.38, 10.93, 10.70 and 13.32 fold reduction in LC50 values against the second, third, fourth and fifth instars respectively. Tests conducted with heat inactivated (at 75, 80, 85 and 121°C for 10 min) and heat shielded SlGV could give similar effects with HearNPV indicating that the cause for the virulence enhancement rests with the capsular protein and not the virions of the SlGV, since the virions could be inactivated at temperatures more than 70°C. Integration of SlGV and HearNPV was found to shorten the LT50 values.Keywords
Helicoverpa armigera, Granulovirus, Nucleopolyhedrovirus, Enhancing Factor.Full Text
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- Toxicity of Insecticides to Papaya Mealybug Parasitoid, Acerophagus papayae (Noyes and Schauff) (Hymenoptera: Encyrtidae)
Abstract Views :271 |
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Authors
Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 00, Tamil Nadu, IN
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 00, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 26, No 3 (2012), Pagination: 274–278Abstract
Toxicity of selected insecticides to papaya mealybug parasitoid, Acerophagus papayae (Noyes and Schauff) (Hymenoptera: Encyrtidae) was evaluated at 1, 3, 6 and 24h after treatment (HAT). Results showed that Thiamethoxam, Chlorpyriphos and Dichlorvos showed very high knock-down effect (100 % mortality) of A. papayae adults within 3 HAT. Fish Oil Rosin Soap (FORS) and Neem oil had very less detrimental effect on adult parasitoids by recording very low mortality percentage at 24 HAT. The residual toxicity data revealed that Thiamethoxam was the most persisting insecticide causing 26.67 per cent mortality of A. papayae even after 28 days after treatment (DAT). Neem oil and Fish Oil Rosin Soap became less or non toxic to adults of A. papayae at three DAT.Keywords
Toxicity, Insecticides, Acerophagus papayae.Full Text
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- Safety of Uv-selected Helicoverpa armigera Nucleopolyhedrovirus to Non-target Beneficial Organisms
Abstract Views :225 |
PDF Views:116
Authors
Affiliations
1 Department of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore - 641003, Tamil Nadu, IN
1 Department of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore - 641003, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 22, No 1 (2008), Pagination: 107-112Abstract
The safety of the UV-selected Coimbatore isolate of Helicoverpa armigera nucleopolyhedrovirus (HaNPV-UVT-CBEI) was tested against the non-target organisms viz., Trichogramma chilonis, Chrysoperla carnea, honey bee species and Bombyx mori to find out whether the cyclical exposure of HaNPV to ultra-violet (UV) radiation could cause adverse effect on the above organisms. The results showed that the HaNPV-UVT-CBEI had no adverse effect on the growth parameters, survival and production parameters of the organisms tested in comparison with the UV shielded HaNPV (HaNPV-UVS-CBEI). The cyclical exposure of HaNPV to UV radiation for the selection of UV tolerant strain did not have any deleterious effect on the safety of the virus to the non-target organisms.Keywords
Apis sp., Bombyx mori, Chrysoperla carnea, Helicoverpa armigera, Nucleopolyhedrovirus, Safety, Trichogramma chilonis.Full Text