REDIA (2018) 101, 53-59

Giada d'Errico, Sheridan Lois Woo, Nadia Lombardi, Gelsomina Manganiello and Pio Federico Roversi (2018)
Activity of chestnut tannins against the southern root-knot nematode Meloidogyne incognita
REDIA 101, 53-59
Abstract: Studies on the effects of tannins on plant-parasitic nematodes are few. A new formulation of a hydrolysable tannin extracted from chestnut (SaviotaNR) was tested for efficacy in controlling Meloidogyne incognita. Therefore, in vitro and pot experiments on tomato were performed to investigate the nematicidal activity of tannin aqueous solutions at different concentrations on M. incognita. In the in vitro experiment the following concentrations of tannin at 0.30, 0.40, 0.50, 0.75, 1.00, 1.25, 1.50 g L^-1 were tested for their effect on the nematode. The second-stage juveniles (J2s) immobility increased with increasing concentration and exposure time. All tested tannin concentrations were effective to reduce viability from about 45 to 70% after 10 days of exposure, in comparison to the treated and untreated controls. The immobile J2s recovered their mobility over time after rinsing and transferring them in water, showing a nematostatic activity of tannins. In the pot experiment, tannins, as aqueous solutions at rates from 0.30 to 1.50 g L^-1, were applied to soil at three different application times (1: only at transplant; 2: at transplant, two weeks after transplant and repeated every seven days; 3: at transplant and two weeks later). The activity of tannins was compared to treated and untreated controls. Tested rates mostly repeated were effective to control nematode attack in comparison to untreated control. The height of treated plants was not significantly influenced by the different applied rates of tannins, whereas nematode population density and root galling index were affected by repeated application times. No visual symptoms of phytotoxicity were detected. The use of SaviotaNR appears promising for the control of M. incognita in sustainable agriculture of short-term crops and/or when nematode population densities are low and as a supplement to other chemical treatments.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Giada D'Errico, Sheridan L. Woo, Pio Federico Roversi

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne incognita	Tomato (Solanum lycopersicum)	Italy