Repellent and Nematostatic Behaviour of Botanical Extracts Against Root-Knot Nematode <i>Meloidogyne incognita</i> Attacking <i>Solanum melongena</i> L.

Abstract

The current experiment was performed to determine the nematicidal behaviour of aqueous extract of various weed plants viz., Parthenium hysterophorus, Cymbopogon citratus, Eichhornia crassipes, Monstera deliciosa and Tinospora cardifolia against hatching, mortality and penetration rate of Meloidogyne incognita under in vitro condition. The eggs and second stage juveniles were exposed to various concentrations (250, 500, 1000, 1500, 2000 and 2500 μg/ml) for 5 days and 12, 24 and 48 h respectively. During the experiment, all plant extracts displayed nematicidal potential. Comparison of LC 50 values of different plant extracts showed that P. hysterophorus was found to be most effective with LC 50 664.9 μg/ml, while T. cardifolia was less effective at 48h of LC 50 1419.0 μg/ml. Aqueous extracts of P. hysterophorus at 2500 μg/ml was highly effective against hatching and mortality after 5 days and 72h exposure period respectively. Whereas T. cardifolia was found least effective. The macerated leaves of P. hysterophorus applied at 0.3 g/kg sand showed the lowest penetration of M. incognita in brinjal roots while T. cardifolia displayed highest after 3 and 5 days' post inoculation. This study suggests that aqueous extract of the selected plants having nematistatic and nematicidal properties that can be used for the management of M. incognita in an eco-friendly manner and sustainable agriculture.

Nematicidal Properties of Medicinal Plants against Root-Knot Nematode - A Systematic Review

“…The root gall index and nematode reproductive factor of Meloidogyne incognita were affected, as were the development and yield of root-knot nematodeinfected tomatoes in the field, by leaf and seed extracts of Ricinus communis and Jatropha curcas (Oluwatayo et al, 2019). Aqueous extract of Tinospora cordifolia shows (97.75%) at the concentrations of 2500 µg/ml, respectively, after 5 days of exposure in inhibition of hatching second-stage juveniles (J2s) of Meloidogyne incognita (Tariq et al, 2022). Aegle marmelos leaf aqueous extract induces 70.16% inhibition on the juveniles of Meloidogyne incognita.…”

Varietal Susceptibility and Disease Resistance of Tomato Cultivars against Meloidogyne incognita in Greenhouse Condition

“…Numerous cultivars of different vegetable crops viz., tomato, carrot, okra, cucumber and brinjal have been recorded as resistant to Meloidogyne spp. (Tariq et al, 2022;Ahmad et al, 2018). The resistant Department of Botany, Section of Plant Pathology and Nematology, Aligarh Muslim University, Aligarh-202 002, Uttar Pradesh, India.…”