In:
BMC Microbiology, Springer Science and Business Media LLC, Vol. 20, No. 1 ( 2020-12)
Abstract:
The root-knot nematode Meloidogyne graminicola has become a serious threat to rice production as a result of the cultivation changes from transplanting to direct seeding. The nematicidal activity of Aspergillus welwitschiae have been investigated in vitro, and the disease control efficacy of the active compound has been evaluated under greenhouse and field conditions. Results The active compound αβ-dehydrocurvularin (αβ-DC), isolated by nematicidal assay-directed fractionation, showed significant nematicidal activity against M. graminicola , with a median lethal concentration (LC 50 ) value of 122.2 μg mL − 1 . αβ-DC effectively decreased the attraction of rice roots to nematodes and the infection of nematodes and also suppressed the development of nematodes under greenhouse conditions. Moreover, αβ-DC efficiently reduced the root gall index under field conditions. Conclusions To our knowledge, this is the first report to describe the nematicidal activity of αβ-DC against M. graminicola . The results obtained under greenhouse and field conditions provide a basis for developing commercial formulations from αβ-DC to control M. graminicola in the future.
Type of Medium:
Online Resource
ISSN:
1471-2180
DOI:
10.1186/s12866-020-01738-2
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2020
detail.hit.zdb_id:
2041505-9
SSG:
12