Meloidogyne javanica

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soybean plants resistant and susceptible to Meloidogyne javanica, a) susceptible plant on right, b) susceptible plant on left (click on image to enlarge it)
Author(s): Juliana Souza da Silva Bruinsma and Zaida Inês Antoniolli
Source: Nematoda, vol. 2 (2015), article 03015

Meloidogyne javanica (Treub, 1885) - (Javanese root-knot nematode)

This species is a highly polyphagous nematode, widely distributed in dry, subtropical and tropical areas. It is a very important crop pest, infesting vegetables like tomato, green pepper or cucumber, as well as other plants like soybean, groundnut and cowpea. Infestations cause stunting and yellowing and can result in substantial yield losses. At the optimum temperature of 30°C, the development time from J2 to egg-laying female lasts about 2-3 weeks.

M. javanica is most reliably identified through PCR analysis. The J2 juveniles are usually about 400-550 µm long, with the tail 10 to 20 μm long and having a finely rounded tip. The stylet of females is approximately 14-17 μm long. The perineal pattern has a distinct lateral field, characterized by parallel lines. The male has a high, rounded head cap.

Vernacular names
• Deutsch: javanisches Wurzelgallenälchen
• English: Javanese root-knot nematode
• Español: nematodo javanés de quiste
• Français: nématode galligène javanais

For a summary of the biology see the genus Meloidogyne.