Eco-friendly management of root-knot nematode (Meloidogyne incognita) in tomato
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Date
2022-11
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College of Post Graduate Studies in Agricultural Sciences, CAU-Imphal, Umiam
Abstract
Studies on “Eco-friendly management of root-knot nematode (Meloidogyne incognita) in tomato” was conducted at CPGS-AS, Umiam, Meghalaya. In this context nematicidal property of botanicals i.e. neem (Azadiracta indica) oil and lemongrass (Cymbopogon citrates) oil and bio-control agents like Trichoderma harzianum, Purpureocillium lilacinum and Pochonia chlamydosporia were tested as in-vitro and invivo to manage the root knot nematode. Under in-vitro condition mortality of J2 mortality was recorded maximum (99.44%) in the lemongrass oil at 2000 ppm concentration which is at par with 1000ppm. Pochonia chlamydosporia at 2% concentration reduced hatching of root knot nematode maximum (9.57%) after 10 days of treatment. Neem oil at 10% concentration after 10 days of treatment could able to check maximum per cent penetration (4.42%) of J2 into the root system and inoculated (Check) showed maximum penetration (25.74%). Based on in-vitro performance of different concentrations of botanicals and bio-control agents were selected for pot-trials under polyhouse condition. It was found that maximum shoot (63.3cm) and root length (36.8cm) was recorded in the combination of botanical + biocontrol + chemical whereas, inoculated treatment showed minimum in 32.9, 14.4 cm of shoot and root length. Minimum no. of gall/plant was observed in the Fluensulfone with 44.04 and more (246.6) in case of Inoculated treatment. Final nematode population was maximum in Inoculated treatment (568/200 cc soil), whereas minimum in Fluensulfone (94/200 cc of soil) and followed by combination of botanical + biocontrol + chemical. Therefore, combination of botanical + biocontrol + chemical is the best treatment which we can adopt as a biological management of RKN in order to manage the root-knot nematode.