Effects of short exposures to spinosad-treated wheat or maize on four stored-grain insects

dc.contributor.author	Athanassiou, CG	en
dc.contributor.author	Arthur, FH	en
dc.contributor.author	Throne, JE	en
dc.date.accessioned	2014-06-06T06:50:23Z
dc.date.available	2014-06-06T06:50:23Z
dc.date.issued	2010	en
dc.identifier.issn	00220493	en
dc.identifier.uri	http://dx.doi.org/10.1603/EC09115	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/5023
dc.subject	Lepinotus reticulatus	en
dc.subject	Rhyzopertha dominica	en
dc.subject	Sitophilus oryzae	en
dc.subject	Stored products	en
dc.subject	Tribolium castaneum	en
dc.subject.other	macrolide	en
dc.subject.other	spinosad	en
dc.subject.other	animal	en
dc.subject.other	article	en
dc.subject.other	chemistry	en
dc.subject.other	drug combination	en
dc.subject.other	drug effect	en
dc.subject.other	food preservation	en
dc.subject.other	insect	en
dc.subject.other	maize	en
dc.subject.other	time	en
dc.subject.other	wheat	en
dc.subject.other	Animals	en
dc.subject.other	Drug Combinations	en
dc.subject.other	Food Preservation	en
dc.subject.other	Insects	en
dc.subject.other	Macrolides	en
dc.subject.other	Time Factors	en
dc.subject.other	Triticum	en
dc.subject.other	Zea mays	en
dc.subject.other	Bostrichidae	en
dc.subject.other	Coleoptera	en
dc.subject.other	Curculionidae	en
dc.subject.other	Hexapoda	en
dc.subject.other	Lepinotus reticulatus	en
dc.subject.other	Psocidae	en
dc.subject.other	Psocoptera	en
dc.subject.other	Rhyzopertha dominica	en
dc.subject.other	Sitophilus oryzae	en
dc.subject.other	Tenebrionidae	en
dc.subject.other	Tribolium castaneum	en
dc.subject.other	Triticum aestivum	en
dc.subject.other	Trogiidae	en
dc.subject.other	Zea mays	en
dc.title	Effects of short exposures to spinosad-treated wheat or maize on four stored-grain insects	en
heal.type	journalArticle	en
heal.identifier.primary	10.1603/EC09115	en
heal.publicationDate	2010	en
heal.abstract	The effect of short exposures to spinosad-treated wheat, Triticum aestivum L., or maize, Zea mays L., was evaluated against adults of four stored-product insect species: lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae); rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae); red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae); and the psocid Lepinotus reticulatus (Enderlein) (Psocoptera: Trogiidae). Adult mortality of these species was recorded after 0, 2, 4, 8, 16, and 40 h on commodities treated with 1 ppm of spinosad (immediate mortality). Then, the surviving individuals were removed and placed on untreated wheat or maize, and mortality was recorded again 7 d later (delayed mortality). Progeny production then was determined 65 and 35 d later for the beetles and psocids, respectively. Among the four species tested, R. dominica was the most susceptible, and immediate mortality after 40 h reached 78 and 72% on wheat and maize, respectively. Moreover, 7 d later, all adults that had been exposed for >2 h were dead on both commodities. Progeny production was significantly reduced in comparison with the controls, and no progeny were found when parental adults had been exposed for >8 or >4 h on wheat and maize, respectively. For S. oryzae, 40-h exposures significantly increased delayed mortality on both wheat and maize, but progeny production still was high. Generally, no effect of short exposures was noted for T. castaneum. For L. reticulatus, despite the fact that the increase of exposure interval increased mortality on maize, progeny production was not avoided. With the exception of T. castaneum, more progeny were found on wheat than on maize. The results of the current study indicate that R. dominica is very susceptible after short exposures to spinosad-treated substrate, but the other species are able to survive and reproduce at the exposure range examined.	en
heal.journalName	Journal of Economic Entomology	en
dc.identifier.issue	1	en
dc.identifier.volume	103	en
dc.identifier.doi	10.1603/EC09115	en
dc.identifier.spage	197	en
dc.identifier.epage	202	en