Effect of inorganic phosphatic fertilizers on the efficacy of an arbuscular mycorrhiza fungus against a root-knot nematode on pyrethrum
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Date
2015-05
Authors
Waceke, J. W.
Waudo, S. W.
Sikora, R.
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor & Francis
Abstract
Effects of triple super phosphate (TSP) and single super
phosphate (SSP) fertilizers on efficacy of a Glomus sp. (isolate KS 14)
against Meloidogyne hapla were determined. The fertilizers were applied
at 150 and 300 kg ha71 at the time of fungus inoculation. Two months
later, plants were inoculated with the nematodes. Plant growth and
nematode disease parameters were determined 2 months after
nematode inoculation. The fertilizers at both levels improved plant
growth in all treatments. In general, the fungus improved plant growth on
its own or in the presence of nematodes, but not in the presence of
fertilizers. Both fertilizers at both levels were more effective in improving
plant growth than the fungus. The fungus showed sensitivity to inorganic
P fertilizers in that the fertilizers significantly reduced fungal root
colonization and its pyrethrum growth stimulative effects. The fungus
suppressed nematode disease severity unlike the fertilizers. The
suppressive effects of the fungus on the nematodes were in most cases
reduced by the fertilizers. The nematodes, unlike the fertilizers, did not
have any significant effects on root colonization by the fungus or on its
ability to improve pyrethrum growth. The presence of nematodes in
fertilizer or fertilizer ± fungus-treated plants, however, significantly
reduced pyrethrum growth
Description
RP-school of agriculture-department of Agricultural Sciences and Technology
Keywords
Meloidogyne hapla, inorganic phosphatic fertilizers, root-knot nematode, pyrethrum)
Citation
International Journal of Pest Management , online # 2002 Taylor & Francis Ltd http://www.tandf.co.uk/journals, DOI: 10.1080/09670870210149862