DEVELOPMENT OF THE ROOT-KNOT NEMATODE, MELOIDOGYNE INCOGNITA IN VIGNA RADIA TA AND CYAMOPSIS TETRAGONOLOBA
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Authors
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SOUMANA DATTA, P. G. TRIVEDI AND B. TIAGI
Department of Botany, University of Rajasthan, Jaipur 302004
Keywords:
Meloidogyne incognita, Vigna radiata, Cyamopsis tetragonoloba, Mung, GuarAbstract
The life cycle of Meloidogyne incognita from egg to egg was completed within 29 days of inoculation of mung [Vigna radiata Linn. (R. Wilcz)] var. 'RSA' plants whereas in guar [Cyamopsis tetragonoloba L. (Taub)] var. 'RGC-91S' it took 44 days at 3S ± 2°C day temperature. After inoculation, in mung, the second moult was observed on the seventh day, third on twelfth day, fourth on 16 (males) to seventeenth day (females) while in guar the third and fourth moults were delayed. Greater number of galls, egg masses and females were present in the root system of mung than in guar. First sign of giant cell formation was visible 72 hours after inoculation in the xylem parenchyma, phloem parenchyma and rarely in the cortex. Less number of juveniles entered the root nodules and only a few successfully completed their life cycle in mung nodules.
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