Suitability of pollen sources for the development and reproduction of Coleomegilla maculata (Coleoptera: Coccinellidae) under simulated drought conditions

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dc.contributor.author Michaud, J. P.
dc.contributor.author Grant, Angela K.
dc.date.accessioned 2012-02-02T19:12:12Z
dc.date.available 2012-02-02T19:12:12Z
dc.date.issued 2012-02-02
dc.identifier.uri http://hdl.handle.net/2097/13448
dc.description.abstract Laboratory experiments compared the nutritive value of various pollen sources for the development of Coleomegilla maculata DeGeer under conditions of continuous water availability and simulated drought. When water was continuously available, larval survival was not diVerent from 100% on diets of frozen eggs of Ephestia kuehniella Zeller, corn pollen, sorghum pollen, or pulverized bee pollen, whereas survival of larvae was signiWcantly reduced on the latter three diets in the simulated drought treatment. Pollen of cultivated sunXower, Helianthus annus L., proved fatal to both larvae and adults; its surface structure caused clumping and accumulation on the insect cuticle that led to death from exhaustion/desiccation in petri dishes. The Ephestia egg diet yielded shorter developmental times and heavier adult weights than any pollen diet in both treatments. The drought treatment increased developmental time on all diets with a signiWcant treatment–diet interaction. Drought reduced the adult weight of females on the sorghum pollen diet, and that of both sexes on the bee pollen diet, again with a signiWcant treatment–diet interaction. Initial water content was highest in corn pollen (36.8%), followed by Ephestia eggs (29.2%), sorghum pollen (25.3%), sunXower pollen (8.7%), and bee pollen (4.6%), but did not appear correlated with C. maculata larval survival on pollen sources under drought conditions. Reproductive adult females that received corn or sorghum pollen as a supplement to Ephestia eggs did not diVer in fecundity or fertility from those fed only Ephestia eggs. en_US
dc.relation.uri http://www.sciencedirect.com/science/journal/10499644 en_US
dc.subject Coleomegilla maculata en_US
dc.subject Development en_US
dc.subject Drought en_US
dc.subject Helianthus annus en_US
dc.subject Pollen en_US
dc.subject Reproduction en_US
dc.subject Sorghum bicolor en_US
dc.subject Zea mays en_US
dc.title Suitability of pollen sources for the development and reproduction of Coleomegilla maculata (Coleoptera: Coccinellidae) under simulated drought conditions en_US
dc.type Article (author version) en_US
dc.date.published 2005 en_US
dc.citation.doi doi:10.1016/j.biocontrol.2004.11.001 en_US
dc.citation.epage 370 en_US
dc.citation.issue 3 en_US
dc.citation.jtitle Biological Control en_US
dc.citation.spage 363 en_US
dc.citation.volume 32 en_US
dc.contributor.authoreid jpmi en_US


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