Syzygium cumini Leaf Extracts as a Nematicide against Root Knot Nematode Meloidogyne javanica in Tomato
Syzygium cumini Leaf Extracts as a Nematicide against Root Knot Nematode Meloidogyne javanica in Tomato
Salma Javed1* and Daniyal Siddiq2
ABSTRACT
Root-knot nematode (Meloidogyne spp.) is a pest of tomato Solanum lycopersicum (L.), causing reduction in yield and quality. The use of natural plant products as biopesticides in the prevention and control of pests and diseases has been increasing. Nematicidal activity of “Black plum Syzygium cumini, leaf aqueous, ethanol and methanol extracts were investigated for managing the population of Meloidogyne javanica, in tomato. In laboratory conditions second-stage juveniles (J2) mortality was recorded after 24, 48 and 72 h of incubation in concentrations of 0.25, 0.5 or 1%. Maximum mortality was achieved with ethanol extracts followed by aqueous and methanol extracts. In the greenhouse, leaf extracts at 60 days after inoculation produced reduction in root galling, egg masses, and nematode populations in plants in treated containers compared to untreated plants (control) with values increasing as time and concentration increased. During sixty days of treatment, no significant effect was recorded in plant height and shoot weight for extracts and concentration. Extracts of S. cumini may have potential for controlling M. javanica on tomato.
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