Efficacy of bacterial parasite Pasteuria penetrans application as nursery soil treatment in controlling root-knot nematode Meloidogyne javanica on tomato

Walia, R.K.; Dalal, M.R.

Pest Management and Economic Zoology 2(1): 19-21

1994


ISSN/ISBN: 0971-5703
Accession: 002825894

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Abstract
Meloidogyne javanica infested soil (4 juveniles/g soil) was treated with root powder preparation of Pasteuria penetrans so as to achieve spore levels of 1x10superscript 3, 1x104 and 1x105/g soil. The number of spores attached per juvenile, 10 days after treatment, was directly proportional to spore density. Tomato seedlings raised in the treated soil yielded 73, 18 and 20% more over untreated check, in the treatments receiving 1x10superscript 3, 1x104 and 1x105 spores, resp. However, there was no significant reduction in the root gall index among the treatments. Higher levels of the bacterium (1x104 and 1x105 spores) reduced the final juvenile population in soil much below the damaging threshold. Approximately 18 and 50% of the final juvenile population in field soil was colonised in treatments with 1x104 and 1x105 spores, resp.