Transfer and Development of Pasteuria Penetrans.
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Date
2007-03
Authors
Kariuki, G. M.
Dickson, D. W.
Journal Title
Journal ISSN
Volume Title
Publisher
The Society of Nematologists
Abstract
Pasteuria penetrans isolate P-20 has been attributed as the cause of soil suppressiveness to peanut root-knot nematode in Florida. In this study, P. penetrans was transferred from a suppressive site to a new site and established by growing susceptible hosts to the peanut root-knot nematode during both summer and winter seasons. When two soil fumigants, 1,3-dichloropropene (1,3-D) and chloropicrin, were applied broadcast at the rate of 168 liters/ha and 263 kg/ha, respectively, the bacterium was not adversely affected by 1,3-D but was adversely affected by chloropicrin. In autumn 2005, after the harvest of the second peanut crop, the greatest number of J2 was recorded in the chloropicrin-treated plots, followed by the non-fumigated plots and 1,3-D-fumigated plots. The percentage J2 encumbered with endospores, endospores per J2 and percentage of P. penetrans-infected females were greatest in the non-fumigated plots, followed by 1,3-D- and chloropicrin-fumigated plots. This study demonstrates that P. penetrans can be transferred from a suppressive site to a new site and increased to suppressive densities against the peanut root-knot nematode.
Description
Keywords
Arachis hypogaea, Biological control, Chloropicrin, 1,3-dichloropropene, Fumigation, Management, Meloidogyne arenaria, Pasteuria penetrans, Peanut, Peanut root-knot nematode, Suppressive soil, Transferability .
Citation
Journal of Nematology, Volume 39, No. 1, March 2007