Influence of temperature on the development of the temperate root-knot nematodes Meloidogyne chitwoodi and M. fallax

Alamgir Khan, Wim Wesemael, Maurice Moens

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    Hatching, migration, invasion and post-penetration development of Meloidogyne chitwoodi and M. fallax were examined at 15, 20 and 25 °C. The optimum temperature for hatching of second-stage juveniles (J2) of M. chitwoodi and M. fallax was 20 °C. However, temperatures above 20 °C and no higher than 25 °C were more favourable for hatching of M. chitwoodi than M. fallax J2, which in contrast hatched in greater number at temperatures below 20 °C and no lower than 15 °C. Meloidogyne chitwoodi J2 migrated farther and in higher numbers than those of M. fallax in sand columns. The optimum temperature for migration was 20 °C for M. chitwoodi and 25 °C for M. fallax. Invasion of roots by both nematodes was higher on potato than maize at all temperatures. For both nematodes the degree-days (DD5, base temperature 5 °C) required for completing their life cycle were 555-740 DD5 on potato and 705-740 DD5 on maize. Temperature played a more important role in post-penetration development than the host plant. The behavioural differences found between M. chitwoodi and M. fallax are discussed in relation to different survival strategies of the two species
    TaalEngels
    TijdschriftRussian Journal of Nematology
    Volume22
    Pagina's (van-tot)1-9
    ISSN0869-6918
    StatusGepubliceerd - 2014

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