DBPapers
DOI: 10.5593/sgem2017/61/S25.109

"NEMAGOLD” – BIO-PRODUCT OF PERSPECTIVE IN THE CONTROL OF ROOT-KNOT NEMATODE (MELOIDOGYNE SPP.) AT TOMATO CROPS UNDER PLASTIC TUNNEL

E. Bratu, G. Sovarel, A.E. Cenusa, M. Velea
Tuesday 12 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7408-12-6 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 61, 837-844 pp, DOI: 10.5593/sgem2017/61/S25.109

ABSTRACT

The study was performed in order to establish the efficacy of the biological product “Nemagold” in the control of root-knot nematodes (Meloidogyne spp.) on tomato crop under plastic tunnel conditions. Experiment was organized on tomato crop (cultivar “Prekos F1”) strongly attached by root-knot nematode, located in south-east of Romania (Varasti-Giurgiu), during July-September 2016 period. Treatments were applied by drip irrigation during the second vegetation season. “Nemagold” product having in composition extract of marigold (Tagetes erecta L. - 80%) and seaweed (10%), was tested at total doses of 30 l/ha and 35 l/ha. The both doses have been applied in 3 steps corresponding to the following experimental variants: V1= 10 l/ha x 3 applications at intervals of 30 days; V2= 15 l/ha at first application + 10 l/ha x 2 applications at intervals of 15 days; V3= untreated check. Irrigation rate was 6000 liter water per hectare. First application was made 5 days after crop planting. Evaluation of root attack degree was performed at 40 and 90 days after first application by using a scoring chart (John Bridge & Sam Page, 1980) from 0 to 10. Product efficacy varied between 17.5% - V1 and 70.0% -V2 at 40 days after 1-st application. At 90 days, efficacy registered 22.1% - V1 and 59.0% - V2, while at the untreated tomato crop (V3), the nematodes attack degree has attained 34.3% and 79.3% after 40 and respectively 90 days. Data were statistical assured. “Nemagold” used at total dose of 35 l/ha gave the best results, providing a very significant decreasing (11% at 40 days; 32, 5% at 90 days) of root-knot nematodes attack, during the vegetation season.

Keywords: bio-product, marigold, extract, Meloidogyne spp., efficacy.