Pratylenchus jaehni




Rev 06/22/2023

  Classification Hosts
Morphology and Anatomy Life Cycle
Return to Pratylenchus Menu Economic Importance Damage
Distribution Management
Return to Pratylenchidae Menu Feeding  References
    Go to Nemaplex Main Menu   Go to Dictionary of Terminology




           Pratylenchus jaehni Inserra, Duncan, Troccoli, Dunn, Santos, Kaplan & Vovlas, 2001


Back to Top

Morphology and Anatomy:

Morphologically similar to P.  coffeae but reproductively isolated from it in mating tests (Inserra et al., 2001).


Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Back to Top


Described from roots of citrus in the state of Sao Paulo, Brazil.

Economic Importance:

Back to Top


    Migratory endoparasite.    

Back to Top


Pratylenhus jaehni was formerly classified as Pratylenchus coffeae which had  three distinct races. Two of the populations reproduced on citrus but not on coffee while the third reproduced on coffee.  The race parasitising coffee, it was distinguished as P. jaehni (Duncan et al., 1999; Inserra et al., 2002).

For an extensive host range list for this species, click

Back to Top

Life Cycle:

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters

iMating experiments showed that P. jaehni is reproductively isolated from P. coffeae. (Inserra et al., 2001).

Back to Top


Pratylenchus jaehni is considered to be as aggressive as Melodogyne incognita on Coffea arabica (Inomoto et al., 2004).

Back to Top


Host Plant Resistance, Non-hosts and Crop Rotation alternatives:

For plants reported to have some level of resistance to this species, click

For coffee plantations in Brazil, cover crops have been identified that are poor- or non-hosts to P. jaehni (Bessi and Inomoto, 2022).

Back to Top


Bessi, R., Inomoto, M.M. 2022. Host status of cover crops for the management of Pratylenchus jaehni on coffee. J. Nematology 54: | DOI: 10.2478/jofnem-2022-0052

Duncan, L. W., Inserra, R. N., Thomas, S. K., Dunn, D., Mustika, I., Frisse, L. M., Mendes, M. L., Morris, K., and Kaplan, D. T. 1999. Molecular and morphological analyses of isolates of Pratylenchus coffeae and closely related species. Nematropica 29:61-81.

Inomoto, M. M., Beluti, D. B., Siqueira, K. M. S., and Kubo, R. K. 2004. Efeito de Pratylenchus coffeae e Meloidogyne incognita no crescimento de cafeeiro �Catua� Vermelho�. Nematologia Brasileira 28: 143�147.

Inserra, R. N.  Duncan, L. W.  Troccoli, A.  Dunn, D.  Santos, J. M. dos  Kaplan, D. Vovlas, N. 2001. Pratylenchus jaehni sp. n. from citrus in Brazil and its relationship with P. coffeae and P. loosi (Nematoda: Pratylenchidae). Nematology 3:653-665.


Back to Top

Copyright  1999 by Howard Ferris.
Revised: June 22, 2023.