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NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Natural Products and Resources (IJNPR)
[Formerly Natural Product Radiance (NPR)] >
NPR Vol.4 [2005] >
NPR Vol.4(4) [July-August 2005] >
| Title: | Insecticide/Fungicide |
| Issue Date: | Aug-2005 |
| Publisher: | CSIR |
| Abstract: | The leaf pulp of Aloe vera Tourn. ex Linn.,
designated as the gel, and the bitter, yellow liquid fraction have been tested
against pathogens (bacteria and fungi) affecting human and plants. However,
their activity for fungal control in commercial industrial crops has not been
determined. Thus, researchers at Mexico carried out studies to evaluate the
inhibitory effect of Aloe pulp and liquid fraction on the mycelial growth of
three phytopathogenic fungi and to determine the extract concentrations that can
inhibit mycelial development. A. vera leaves were cut from plants grown under
greenhouse conditions at the University Antonio Narro, disinfected with sodium
hypochlorite and separated in two groups. In the first group, the pulp was
manually scraped out; in the second, a laboratory roll processor was used for
the pulp and liquid fraction separation. Both types of extracts were pasteurized. Antifungal activity of pulp and liquid fraction was evaluated on
the mycellium development of Rhizoctonia solani, Fusarium oxysporum and
Colletotrichum coccodes that were isolated from a potato crop by the hyphae
point and monosporic techniques. Fungal plugs 0.4mm in diameter were placed in
petri dishes with a potato–dextrose–agar (PDA) culture media and treated with
various concentrations of pulp or liquid fraction. The cultures were incubated
at 24±2 C and the radial growth of mycelia measured daily for 7 days. The
antifungal effect was measured under a totally random design with four
replications.
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| Page(s): | 289-289 |
| ISSN: | 0975-1092 (Online); 0972-592X (Print) |
| Source: | NPR Vol.4(4) [July-August 2005]
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