Expression of feeding symptoms from pink hibiscus mealybug (Hemiptera: Pseudococcidae) by commercially important cultivars of hibiscus

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dc.contributor.authorVitullo, Justinen
dc.contributor.authorZhang, Aijunen
dc.contributor.authorMannion, Catharineen
dc.contributor.authorBergh, J. Christopheren
dc.contributor.departmentEntomologyen
dc.contributor.departmentVirginia Agricultural Experiment Stationen
dc.date.accessioned2019-11-11T14:25:52Zen
dc.date.available2019-11-11T14:25:52Zen
dc.date.issued2009-06en
dc.description.abstractThe pink hibiscus mealybug, Maconellicoccus hirsutus (Green), is a highly polyphagous pest that invaded southern Florida in 2002 and is now widely established throughout most of the state. Although Hibiscus rosa-sinensis L. is a preferred and economically important host of M. hirsutus, the susceptibility and expression of feeding symptoms by different cultivars have not been evaluated. Cultivars of H. rosa-sinensis were infested with M. hirsutus and evaluated daily for 40 d for the onset and percentage of terminals expressing feeding symptoms. Under different initial densities of M. hirsutus, the cultivar 'President' showed no difference in the latency to expression of feeding symptoms, which occurred between 7 and 15 d after infestation, but did show significant differences between initial density and percentage of terminals expressing feeding symptoms from 10 d onward. When infested with 20 females, 80% of 'President' terminals exhibited symptoms 30 d after infestation. Four other cultivars initially infested with 10 female M. hirsutus showed significant differences in the onset and severity of feeding symptoms. All plants of the cultivars 'Florida Sunset' and 'Joanne' expressed damage symptoms at 12 +/- 2 SE d and 10 +/- 1 d, respectively, following infestation. Only a single plant of the cultivars 'Double Red' and 'Snow Queen' showed such symptoms at 19 and 30 d after infestation, respectively. Significant differences between cultivar and the percentage of terminals expressing feeding symptoms were observed from 20 d onward. Terminals sampled from all plants after 40 d revealed that egg, nymph, and adult female M. hirsutus were found on all plants, including those that did not exhibit feeding symptoms. These data have shown that hibiscus cultivars differ in their expression of M. hirsutus feeding symptoms, that M. hirsutus can reproduce on cultivars of hibiscus that do not express feeding symptoms, and that feeding symptoms are not a reliable indicator of infestation by M. hirsutus, highlighting the need for further investigation of the mechanisms underlying differences among cultivars.en
dc.description.notesWe thank the USDA-CSREES Southern Region IPM Program, Award 2007-34103-18140 for funding, Garden Depot (Miami, FL) for donating plants, and H. Glen for technical assistance. Thanks to R. Fell (Dept. of Entomology, Virginia Tech) and D. Pfeiffer (Dept. of Entomology, Virginia Tech) for advising expertise.en
dc.description.sponsorshipUSDA-CSREES Southern Region IPM ProgramUnited States Department of Agriculture (USDA)National Institute of Food and Agriculture [2007-34103-18140]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1653/024.092.0208en
dc.identifier.issn0015-4040en
dc.identifier.issue2en
dc.identifier.urihttp://hdl.handle.net/10919/95476en
dc.identifier.volume92en
dc.language.isoenen
dc.publisherFlorida Entomological Societyen
dc.rightsCreative Commons Attribution-NonCommercial 3.0 Unporteden
dc.rights.urihttp://creativecommons.org/licenses/by-nc/3.0/en
dc.subjectMaconellicoccus hirsutusen
dc.subjectHibiscus rosa-sinensisen
dc.subjecthost toleranceen
dc.titleExpression of feeding symptoms from pink hibiscus mealybug (Hemiptera: Pseudococcidae) by commercially important cultivars of hibiscusen
dc.title.serialFlorida Entomologisten
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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