Root invasion of different plant hosts by juveniles of Meloidogyne species encumbered with Pasteuria penetrans spores.
The effects of Pasteuria penetrans-encumbered juveniles of Meloidogyne incognita, M. graminicola and M. javanica with two levels of attachment (5-10 and >11 spores/J2) were studied on the invasion of roots of tomato, barnyard grass, sorghum and aubergine. Invasion by spore-encumbered juveniles was significantly less compared to juveniles without spores. There was no statistically significant difference in root invasions between the two attachment levels in the case of tomato, barnyard grass and sorghum. However, a statistically significant difference was observed between the two attachments levels in the case of M. javanica invading the roots of aubergine. The encumbered juveniles (5-10 spores/J2) of M. incognita, M. graminicola and M. javanica caused 41.76% reduction in invasion of tomato roots, 24.58 and 33.13% reductions of barnyard grass and sorghum roots and 11.20 and 19.55% reductions of tomato and aubergine roots, respectively. The reductions in invasions caused by the juveniles encumbered with >11 spores/J2 were: 46.47% in tomato by M. incognita; 25.54 and 38.40% in barnyard grass and sorghum by M. graminicola and 23.87 and 43.73% in tomato and aubergine by M. javanica, respectively.