V. Selvanarayanan

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Laboratory experiments on the evaluation of infectivity of Beauveria bassiana (Bals.) Vuill. to tobacco caterpillar Spodoptera litura Fab. as influenced by two okra varieties. Infectivity of B. bassiana at three concentrations viz. 0.1, 1.0 and 3.0 per cent was evaluated by contaminated food bioassay method. In comparison, topical bioassay method was also(More)
To enhance the field persistency of S. litura nuclear polyhedrosis virus (SLNPV), three chemicals viz. cupric ammonium nitrate, tinopal and cupric sulphate were tried as protectants (0.01 mg/ml) against natural sunlight (UV) irradiation. On exposure for 8 hr and subsequent bioassaying (diet surface treatment), it was found that cupric sulphate protected the(More)
Host plant resistance offers a viable alternative to the use of chemical insecticides for managing insects Infesting tomato. Hence, a study was carried out in Tamil Nadu, India during 1996 to 2004. An exhaustive germplasm comprising 321 tomato accessions including cultivars, wild lines, land races, tribal/native tomatoes was gathered from various sources(More)
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