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Molluscicidal and antifungal activity of Erigeron speciosus steam distillate
Author(s) -
Meepagala Kumudini M,
Sturtz George,
Wise David,
Wedge David E
Publication year - 2002
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.542
Subject(s) - bioassay , botrytis cinerea , steam distillation , colletotrichum acutatum , biology , botany , fractionation , fumigation , horticulture , chromatography , chemistry , inoculation , ecology , essential oil
The steam‐distilled fraction of the aerial parts of Erigeron speciosus (Lindl) DC was tested for activity against strawberry plant pathogenic fungi Botrytis cinerea Pers ex Fr, Colletotrichum acutatum Simmonds, C fragariae Brooks, C gloeosporioides (Penz) Penz & Sacc, and the intermediate host snail Planobdella trivolvis that harbors the trematode, Bolbophorus confusus , that infests and causes severe infections in pond‐raised catfish in the Mississippi Delta region of the USA. Bioautography on silica TLC plates demonstrated antifungal activity in the steam distillate. Preliminary bioassays of the steam distillate indicated the presence of phytochemicals toxic to P trivolvis . The bioactive compounds methyl 2 Z , 8 Z ‐deca‐2,8‐diene‐4,6‐diynoate and its 2 E , 8 E isomer were isolated by bioassay‐guided fractionation and chromatographic techniques and identified by 1 H NMR spectroscopy. © 2002 Society of Chemical Industry