Abstract

CABRERA-HIDALGO, Anselmo de Jesús et al. Effect of fluensulfone on Meloidogyne incognita in onion crop. Revista bio ciencias [online]. 2023, vol.10, e1453.  Epub Feb 23, 2024. ISSN 2007-3380.  https://doi.org/10.15741/revbio.10.e1453.

Onion is a plant widely cultivated in the world, only behind potatoes and tomatoes. Mexican production yields 1,487,102 t in an area of 47,952 ha. In this study, the nematode associated with onion cv. Cirrus was morphologically and molecularly identified, as well as the effect of fluensulfone (1.75, 2, and 2.25 L.ha-1) and fenamiphos (7 L.ha-1) on the nematode population and crop damage, were evaluated. The species associated with onion plants was Meloidogyne incognita. The preventive application of fluensulfone decreased the negative effect of M. incognita on onion yield, providing a good control on the nematode population higher than Fenamiphos. At 60 days after sowing (das), Fluensulfone (2 and 2.25 L.ha-1) reduced the population and damage caused by M. incognita by 76-78 % and 72-80 %, respectively in comparison with untreated plants. At 90 das, root galling was less than 15 %. Plants treated with Fluensulfone (2.25 L.ha-1) and Fenamiphos increased the production of commercial bulbs by up to 14 % compared with untreated plants. Hence, the application of Fluensulfone for the M. incognita management in onion crops is recommended, as part of an integrated management plan of root-knot nematodes.

Keywords : Allium cepa; Fenamiphos; Fluensulfone; root-galling; root-knot nematode.

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