ISSN:
1573-1561
Keywords:
Spodoptera exigua
;
Lepidoptera
;
Noctuidae
;
psoralen
;
5-methoxypsoralen
;
8-methoxypsoralen
;
furanocoumarins
;
antagonistic toxicity
;
plant-insect interactions
;
Apium prostratum
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract The linear furanocoumarins psoralen, bergapten, and xanthotoxin were tested for toxicity to the beet armywormSpodoptera exigua (Hübner) under short ultraviolet (UVB) radiation. Increased dietary concentrations of each furanocoumarin significantly decreased insect larval weight, extended generation time, and induced higher mortality. Xanthotoxin was the most toxic, followed by psoralen and bergapten. Combining psoralen with bergapten, xanthotoxin, or both resulted in significantly antagonistic effects on insect mortality. The combination of bergapten and xanthotoxin, however, produced additive effects. The implications of these observations forS. exigua resistance in the wild plant accession ofApium prostratum and the enigma the findings represent for plant-insect relationships are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00980684
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