Resistance to the two-spotted spider mite, Tetranychus urticae (Koch), in New Guinea Impatiens

dc.contributor.author Al-Abbasi, Sabri
dc.contributor.department Horticulture
dc.date 2018-08-15T05:07:58.000
dc.date.accessioned 2020-07-02T05:58:42Z
dc.date.available 2020-07-02T05:58:42Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 1981
dc.date.issued 1981
dc.description.abstract <p>Twenty-seven Impatiens lines were screened and scored for resistance to the two-spotted spider mite, tested for leaf cuticle amount, crossed, and selfed. Progenies of successful matings were subjected to feeding preference and score rating tests. Seventeen lines from the parents and their progenies were selected and tested for oviposition, life cycle of the pest, feeding preference, leaf pH preference, and for size of eggs, females, and males of the mites;Considerable differences were found among these lines in all tests except the reciprocal hybrid evaluation. Leaf cuticle appeared to have some influence on development of the mite population;The resistance to the mites in Impatiens does not seem to be related to a single mechanism but to many mechanisms, and the genetic control of resistance is no doubt complex;Attention in future studies should be focused on the twin lines, '7729-8' and '7729-9', as sources of genes for resistance to the two-spotted spider mite.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/7146/
dc.identifier.articleid 8145
dc.identifier.contextkey 6304983
dc.identifier.doi https://doi.org/10.31274/rtd-180813-5502
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/7146
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/79991
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/7146/r_8122493.pdf|||Sat Jan 15 01:43:10 UTC 2022
dc.subject.disciplines Entomology
dc.subject.keywords Horticulture
dc.title Resistance to the two-spotted spider mite, Tetranychus urticae (Koch), in New Guinea Impatiens
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication df043cd4-424c-49f5-8685-318972aae642
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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