Threshold level of the bacterium Pasteuria penetrans on Meloidogyne javanica juveniles on tomato

Salh, H.M.; Fattah, F.A.; Al Ani, R.A.; Aboud, H.M.

Arab Journal of Plant Protection 17(2): 88-91

1999


ISSN/ISBN: 0255-982X
Accession: 003598383

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Abstract
Five different spore loads (1-5, 6-10, 11-20, 21-40 and more than 40 spores/juvenile) were tested on second stage juveniles (J2) of M. javanica to assess the biocontrol efficiency and the threshold level of spores/J2 for mass propagation of P. penetrans. Results showed that 21-40 and more than 40 spores/J2 significantly reduced (P<0.05) the number of nematode eggs and females on tomato roots compared with the nematode-only treatment. 11-20 spores/J2 showed the highest percentage of J2s encumbered in the soil (57.3%) and also the highest number of bacteria-infected females in the roots compared with the other treatments.