PATHOGENICITY AND MANAGEMENT OF ROOT KNOT NEMATODE, Meloidogyne incognita ON CARROT
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Date
2023
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RPCAU, Pusa
Abstract
The carrot (Daucus carota sub sp. sativus) is a cool season root crop, belongs to umbelliferae family, is a native of Central Asia. Although the branches and leaves of the plant are also eaten, the tap root is the part that is most frequently consumed. From long and thin to short and thick, roots come in a variety of diameters. The carrot root is abundant in beta carotene, a precursor to pro vitamin A that prevents the condition known as xeropthalmia also called as night blindness. Carrot crops are badly destroyed worldwide by root-knot nematode, which is a big problem in most of the crops. The research is planned to study pathogenicity and management of M. incognita in carrot. For pathogenicity, the plants were inoculated with different levels of inoculum densities (10, 100, 1000, 5000, 10000 J2/kg soil). The result showed that the highest root length was observed in plants that were inoculated 4 weeks after germination (14.49 cm) as opposed to plants that were inoculated 2 weeks after germination (5.64 cm) when inoculated with 10 J2/kg soil. At an inoculum level of 10,000 J2/kg soil, plants inoculated two weeks later germination had the highest number of galls per seedling (67.33), compared to plants inoculated four weeks later germination (51.33). Thus, it was found that, the plants that are inoculated 2 weeks after germination are more sensitive than plants that are inoculated 4 weeks after germination. The goal of the current study was to determine how well organic amendments, leaf extracts and bioagents worked against Meloidogyne incognita in carrot. The root-knot nematode was most effectively managed by Pseudomonas putida @ 10 g/pot followed by neem cake @ 10 g/pot, as shown by raising all plant development indices and falling nematode multiplication parameters. As opposed to organic amendments and leaf extracts, bioagents were yielding favorable results.