Journal
JOURNAL OF ECONOMIC ENTOMOLOGY
Volume 93, Issue 3, Pages 989-992Publisher
ENTOMOL SOC AMER
DOI: 10.1603/0022-0493-93.3.989
Keywords
Diabrotica virgifera virgifera; Zea mays; antibiosis; hydroxamic acids; DIMBOA
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Hydroxamic acid content was analyzed in the root tissue of four maize, Zea mays L., lines using high-performance liquid chromatography (HPLC) and related to western corn rootworm, Diabrotica virgifera virgifera LeConte, larval development and survivorship. Maize lines evaluated included Mp710 (PI 596627), MpSWCB-4 (PI 550498), Sc213 (PI 548792), and Dk580 (DeKalb commercial hybrid). Maize plants from each line were grown in test tubes containing a transparent agarose gel medium in a growth chamber. After 8 d of growth, root tissue of each line was harvested and hydroxamic acid content analyzed using HPLC. Three hydroxamic acids, 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), 6-methoxybenzoxazolinone (MBOA), and 2,4-dihydroxy-1,4-benzoxazin-3-one (DIBOA), were identified in the maize roots tested. DIMBOA concentration was quantified and ranged from 246.37 +/- 70.53 mu g to 91.84 +/- 49.82 mu g DIMBOA per gram of root tissue. No significant difference was found among lines in D. v. virgifera larval development and survivorship.
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