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Sundara Babu, P. C.
- Toxicity of Certain Insecticides to Predatory Green Lacewing, Chrysoperla carnea Stephens (Nenroptera: Chrysopidae)
Authors
1 Central Institute for Cotton Research - Regional station, Coimbatore 641 003, Tamil Nadu, IN
2 Department of Agricultural Entomology Tamil Nadu Agricultural University Coimbatore 641 003, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 14, No 1 (2000), Pagination: 5-7Abstract
Insecticides showed distinct deleterious effects on different life stages of predatory green lacewing, Chrysoperla carnea Stephens. Abamectin caused the maximum egg mortality of 25.2 per cent as against 0.3 per cent in control. Carbaryl affected the grubs more and the mortality was 83.3 per cent. Endosulfan and ahamectin had no adverse influence on the grubs and the grub mortality was only 3.3 and 6.7 per cent. respectively. Adult emergence was highly affected by carharyl, which recorded only 10.00 per cent as against 93.33 per cent adult emergence in control. The time taken for cent per cent mortality of adults in control was 23.33 days, but in the case of quinalphos (0.04%), it was 0.66 days and the fecundity was 0.5 eggs as against 160.4 eggs in control.Keywords
Chrysoperla carnea, Insecticides, Toxicity.- Survey and Tritrophic Interactions between Host Plants,Helopeltis antonii Signoret (Heteroptera:Miridae) and its Egg Parasitoids
Authors
1 National Research Centre for Cashew, Puttur 574 202, Karnataka, IN
2 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 13, No 1&2 (1999), Pagination: 19-23Abstract
The egg parasitoids of Helopeltis antonii Signoret existing in neem endemic area (coastal and hinterland of Tamil Nadu) and in non-neem endemic area (western ghats of Tamil Nadu and coastal Karnataka) are Telenomus sp. laricis group (Scelionidae), Erythmelus helopeltidis Gahan (Mymaridae), Chaetostricha sp. and Ufens sp. (Trichogrammatidae). Telenomus sp. is very much dominant in non-neem endemic areas, whereas Ufens sp. is quite prominent in neem endemic areas. When the eggs of H. antonii laid on neem were exposed for natural parasitism, neem has not exerted any adverse interaction on Telenomus sp.Keywords
Egg Parasitoids, Helopeltis antonii.- A Study on the Management of some Pests of Groundnut (Arachis hypogaea L.) with Biocontrol Agents
Authors
1 Centre for Plant Protection Studies Tamil Nadu Agricultural University, Coimbatore - 641003, IN
Source
Journal of Biological Control, Vol 8, No 1 (1994), Pagination: 1-4Abstract
Results of a field experiment conducted to compare the field efficacy of biocontrol agents with locally recommended practice of using chemical insecticides revealed that use of Trichogramma chilonis (Ishii) (1,00,000/ha) and Chrysoperla carnea (Banks) (50,000/ha) 40 and 55 days after sowing could effectively check the population of Hellcoverpa armlgera (Bubn.) and Bemisia tabaci (Genn.), This was on par with insecticides. Application of Nuclear Polyhedrosis Virus of Spodoptera litura (Fb.) at 250 larval equivalents +2.5 kg crude sugar/ha could effectively control the larval population of S. litura, Pod yield was increased significantly in biocontrol plots which was on par with chemical insecticide-treated plots.Keywords
Groundnut, Biocontrol,Helicoverpa armigera, Spodoptera litura, Bemisia tabaci, Empoasca kerri.- Control of Sugarcane Shoot Borer Chilo infuscatellus Snellen with Granulosis Virus and Cultural Practices
Authors
1 Department of Agrl. Entomology, Tamil Nadu Agricultural University, Coimbatore - 641003, IN
Source
Journal of Biological Control, Vol 7, No 2 (1993), Pagination: 81-83Abstract
A field experiment was conducted during 1991-92 crop season at Sathiamangalam, Periyar district, Tamil Nadu, on the control of sugarcane shoot borer, Chilo infuscateiius using granulosis virus (GV) and cultural methods of control. The shoot borer infestation was significantly less in plots treated with GV and plots treated with GV+ cultural practices, than in control. Application of GV at 107 inclusion bodies/ml on 35 and 50 days after planting significantly reduced the shoot borer infestation compared to other treatments. All the treatments gave increased cane yieldover control. The GV treatment alone resulted in a cost benefit ratio of 1:2.54 whereas it was 1:2047 for trash muiching, 1:2.46 for GV application and 1:2.43 for GV+ earthing up.
Keywords
Chilo infuscatellus, Control, Granulosis Virus, Cultural Practices.- Efficacy of Nuclear Polyhedrosis Virus Against Spodoptera litura (Fab.) on Tobacco (Nicotiana tabacum L.) in Different Locations of Tamil Nadu, India
Authors
1 Department of Entomology, Tamil Nadu Agricultural University, Coimbatore - 641 003, IN
Source
Journal of Biological Control, Vol 6, No 1 (1992), Pagination: 22-25Abstract
Field experiments conducted against Spodoptera litura (Fab.) with nuclear polyhedrosls virus (NPV) on tobacco (Nicotiana tabacum L.) in twelve different locations of Tamil Nadu indicated that two rounds of application at 250 larval equivalents (LE)/ha with crude sugar 2.5 kg/ha at 10, days Interval was significantly superior to untreated control in reducing the larval population, irrespective of the locations tested.Keywords
NPV, Spodoptera litura, Tobacco.- Field Efficacy of Granulosis Virus and Insecticides in the Control of Sugarcane Shoot Borer Chilo infuscatellus Snellen
Authors
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore - 641 003, IN