ISSN:
1573-1561
Keywords:
Corn
;
Zea mays (L.)
;
southwestern bora borer
;
Diatraea grandiosella
;
Dyar
;
Lepidoptera
;
Pyralidae
;
feeding resistance
;
2-hydroxy-4,7-dimethoxy-1,4-benzoxazin-3-one
;
N-O-Me-DIMBOA
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract The southwestern corn borer (SWCB),Diatraea grandiosella Dyar, is a major pest of corn,Zea mays L., in the southern United States. The damage to corn is caused primarily by larval feeding on leaf, ear, and stem tissues. In this study, 2-hydroxy-4,7-dimethoxy-1,4-benzoxazin-3-one (N-O-Me-DIMBOA) was identified by MS and NMR as present in corn whorl surface waxes. This compound has evidently not been isolated previously, but its glucoside has been reported in corn, wheat, andCoix lachryma. It is present in the waxes in a higher concentration than DIMBOA (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one) and 6-MBOA (6-methoxybenzoxazolinone). It was toxic to the SWCB in a stress diet, but it was less toxic to this insect than 6-MBOA when incorporated in the standard rearing diet. Nevertheless, it may have some role in the resistance of corn to the SWCB because the total surface wax content is higher in resistant lines than in susceptible lines.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00994323
Permalink