Browsing by Author "S. Satpathy"

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Toxicity of insect growth regulator against diamond back moth, Plutella xylostella (L.)
(2001) S. Satpathy; Samarjit Rai
Laboratory studies were conducted to find out the toxicity of Rimon (Novaluron 10 EC), at chitin synthesis inhibitor on two growth stages, i.e., 2-day-old and 6-day-old larvae of diamond back moth. Maximum mortality inflicted by the IGR was 96.27% and 74.05% on young and old larvae respectively. The LC50 on 6-day-old larvae (0.00139%) was about 4 times more than the LC50 on 2-day-old larvae (0.00044%).
Use of intercrops and antifeedants for management of eggplant shoot and fruit borer Leucinodes orbonalis (Lepidoptera: Pyralidae)
(2011) S. Satpathy; D.S. Mishra
The impact of vegetational diversity through intercrop and the application of antifeedants were assessed for their ability to reduce the infestation of shoot and fruit borer Leucinodes orbonalis Guen. on eggplant. Intercropping with coriander and fennel reduced the fruit damage to 12-15% compared with the plots with eggplant monoculture. Total yield of intercropped eggplant was significantly higher than the eggplant monoculture yield. Coriander and fennel were found to be equally effective in reducing infestation by L. orbonalis. Neem seed kernel extract (4%) and the neem-based product Neemarin® were found to be more effective in controlling L. orbonalis than ash dust and were lower than the untreated control. The fruit infestation level in the neem treatments (either of them) was 15-16% less than the untreated check. The interaction of intercrop and antifeedant showed that coriander-intercropped eggplant along with foliar spray of Neemarin® significantly reduced fruit damage. In a multiple choice chamber, orientation of female moths to eggplant was significantly reduced in the presence of fennel or coriander. With 38.9 and 37.1 per female, the extent of egg-laying by L. orbonalis on eggplant associated with fennel or coriander, respectively, was significantly less than on sole eggplant (48.4/female). © Copyright ICIPE 2011.
Wild taxa of Okra (Abelmoschus Species): Reservoir of genes for resistance to biotic stresses
(International Society for Horticultural Science, 2007) B. Singh; Mathura Rai; G. Kalloo; S. Satpathy; K.K. Pandey
Eight Abelmoschus species occur in India. out of these, A. esculentus is the only known cultivated species. A. moschatus occur as wild species and is also cultivated for its aromatic seeds, while the rest six are truly wild types. The wild species occupy diverse habitats. The species A. ficulneus and A. tuberculatus spread over semi arid tracts of north and northwestern; A. crinitus, A. manihot and A. tetraphyllus and A. pungens are found in Tarai ranges and foot hills of Himalayas; A. angulosus, A. moschatus, A. tetraphyllus are widely distributed throughout western and eastern ghats and also peninsular tracts of south while A. crinitus and A. pungens are distributed in north eastern region of India. Assessions resistance to Yellow Vein Mosaic Virus (YVMV) in A. manihot, A. angulosus, A. crinitus and few land races of A. tetraphyllus, for okra Enation Leaf Curl Virus (oELCV) in A. crinitus, A. angulosus and A. manihot, for powdery mildew in A. tetraphyllus and A. angulosus, for Cercospora blight in A. crinitus, A. moschatus and A. angulosus and for fruit borer tolerant in A. tuberculatus have been identified at Indian Institute of Vegetable Research, Varanasi during last 14 years. High level of tolerance for mites and Jassids is found in A. angulosus and A. moschatus and A. crinitus, respectively, whereas, symptomless career to jassids has been observed in few lines of A. caillei. Wild species have not been fully utilized in breeding programmes due to crossing barrier. Resistance to YVMV is not stable in the cultivated species and frequent breakdown of resistance have been observed in developed varieties so that there is an urgent need to adopt the non-conventional method of breeding programme with combination of biotechnological tools for development of pre breeding lines resistant to biotic stresses.