In:
Nematology, Brill, Vol. 12, No. 2 ( 2010), p. 247-253
Abstract:
Methanol extracts of 50 plant species were assessed for nematicidal activity
against the pine wood nematode (PWN), Bursaphelenchus xylophilus. Out of these, five extracts: Justicia diclipteroides subsp. usambarica; Nerium
oleander; Persea americana; Scadoxus multiflorus subsp. multiflorus; and Thespesia populnea, caused 96-100% mortalities of pine wood nematode at 1000
μg ml–1 for 48 h. Methanol extract of the stem bark of P. americana (avocado) and the n-hexane layer obtained from the methanol extract by
solvent partitioning caused 100% mortality of PWN at low concentrations of 125 and 63 μg ml–1, respectively. One potent nematicidal compound was
isolated from the stem bark of P. americana and its chemical structure was determined to be isoobtusilactone A (1) by mass and NMR spectral analyses.
The chemical showed a very strong nematicidal activity against PWN; it caused mortalities of over 97% at concentrations higher than 50 μg ml–1.
Compared with a commercial synthetic nematicide, morantel tartrate, compound 1 showed a little more potent activity. The results suggested that compound
1 may have the potential to be explored as a natural nematicide or be useful as a lead molecule for development of new nematicidal agents for controlling
the pine wilt disease caused by B. xylophilus.
Type of Medium:
Online Resource
ISSN:
1388-5545
,
1568-5411
DOI:
10.1163/138855409X12470480754708
Language:
Unknown
Publisher:
Brill
Publication Date:
2010
detail.hit.zdb_id:
2019332-4
SSG:
12
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