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Nematology (2000) 2, p. 766 (Kok et al.)
C.J. (Hans) Kok and Ate De Heij (2000)
Survival and infectivity of Meloidogyne hapla, M. fallax and M. chitwoodi at different temperatures
Nematology 2 (7), 766-766
Presented at the 25th International Nematology Symposium, Herzliya, Israel, 2-7 April 2000
Abstract: Hatching, survival and infectivity of three temperate Meloidogyne species was compared at 5, 10, 15, 20 and 25°C. Egg masses were incubated on hatching sieves and the hatched nematodes (J2) were counted over time. Batches of J2 were inoculated in containers with sand and stored at the different temperatures. On sampling, J2 were extracted for survival measurements. In other containers lettuce or tomato were planted as bioassay plants to determine the infectivity of J2. The energy reserves of J2 were determined with oil red O. At 5°C infective juveniles of all three species were found even after 1 year of incubation. At higher temperatures the survival time and infectivity was strongly reduced. The energy reserves of the juveniles was correlated to infectivity. At low temperatures hatching of M. fallax and M. chitwoodi was faster than that of M. hapla. This shows that M. hapla is less adapted to cold temperatures than M. chitwoodi or M. fallax. The high activity of M. fallax and M. chitwoodi at low temperatures indicates that delaying the time of sowing in spring could be effective against these nematodes. The dynamics of the hatching process do not agree with the linear degree-days model used for nematode-temperature interactions.
Database assignments for author(s): C. Johannes Kok
Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
Pest and/or beneficial records:
Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
---|---|---|---|---|
Meloidogyne chitwoodi | ||||
Meloidogyne fallax | ||||
Meloidogyne hapla |