European corn borer resistance in sorghum compared with maize

dc.contributor.author Dharmalingam, Sinniah
dc.contributor.department Entomology
dc.date 2018-08-15T09:44:39.000
dc.date.accessioned 2020-07-02T06:07:05Z
dc.date.available 2020-07-02T06:07:05Z
dc.date.copyright Sat Jan 01 00:00:00 UTC 1983
dc.date.issued 1983
dc.description.abstract <p>A total of 211 sorghum, Sorghum bicolor (L), genotypes were evaluated (1981, 1982, and 1983) for resistance to leaf feeding by 1st-generation European corn borer (ECB), Ostrinia nubilalis Hubner, larvae under heavy infestation conditions (ca. 750 eggs/plant). All sorghum hybrids were resistant. Some sorghum hybrids were not as resistant, however, as a highly resistant inbred line of maize, Zea mays L;First-generation larval mortality was rapid on four sorghum hybrids (92.2 - 97.7% mortality within 6 days after egg hatch), but larval mortality was not as rapid on four sorghum hybrids as was larval mortality on a resistant maize inbred (99.1 - 99.7% mortality within 6 days after egg hatch). The majority of 22,827 1st-generation larvae fed on leaf tissue in the moist area deep in the whorl of sorghum and maize plants. Resistance in sorghum, as in maize, to 1st-generation ECBs, therefore, is resistance to leaf feeding (a high level of antibiosis against 1st- and 2nd-instar larvae). Dried-ground leaves (substituted for wheat germ in a meridic diet) of resistant genotypes of sorghum and maize had no deleterious effect on survival and development of ECB larvae compared with a diet containing leaves of susceptible maize and compared with a standard wheat germ diet;Second-generation larval mortality was rapid on four sorghum hybrids (93.9 - 98.9% mortality within 6 days after egg hatch) and on two resistant maize inbreds (92.6 - 97.8% mortality within 6 days after egg hatch). The majority of 33,690 2nd-generation larvae fed on sheath-collar tissue through 35 days after egg hatch of sorghum plants and through 15 days after egg hatch on maize plants. Resistance in sorghum to 2nd-generation ECBs as in maize, therefore, is resistance to sheath-collar feeding (a high degree of antibiosis against 1st- and 2nd-instar larvae).</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/8467/
dc.identifier.articleid 9466
dc.identifier.contextkey 6335101
dc.identifier.doi https://doi.org/10.31274/rtd-180813-8566
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/8467
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/81458
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/8467/r_8407066.pdf|||Sat Jan 15 02:11:50 UTC 2022
dc.subject.disciplines Entomology
dc.subject.keywords Entomology
dc.title European corn borer resistance in sorghum compared with maize
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication f47c8cad-50be-4fb0-8870-902ff536748c
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
File
Original bundle
Now showing 1 - 1 of 1
Name:
r_8407066.pdf
Size:
855.65 KB
Format:
Adobe Portable Document Format
Description: