Insecticidal efficacy of diatomaceous earth against Sitophilus oryzae (L.) (Coleoptera: Curculionidae) and Tribolium confusum du Val (Coleoptera: Tenebrionidae) on stored wheat: Influence of dose rate, temperature and exposure interval

dc.contributor.author	Athanassiou, CG	en
dc.contributor.author	Vayias, BJ	en
dc.contributor.author	Dimizas, CB	en
dc.contributor.author	Kavallieratos, NG	en
dc.contributor.author	Papagregoriou, AS	en
dc.contributor.author	Buchelos, CTh	en
dc.date.accessioned	2014-06-06T06:46:43Z
dc.date.available	2014-06-06T06:46:43Z
dc.date.issued	2005	en
dc.identifier.issn	0022474X	en
dc.identifier.uri	http://dx.doi.org/10.1016/j.jspr.2003.12.001	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/3153
dc.subject	Diatomaceous earth	en
dc.subject	Inert dusts	en
dc.subject	Natural insecticides	en
dc.subject	SilicoSec	en
dc.subject	Sitophilus oryzae	en
dc.subject	Stored wheat	en
dc.subject	Tribolium confusum	en
dc.subject.other	Coleoptera	en
dc.subject.other	Curculionidae	en
dc.subject.other	Sitophilus oryzae	en
dc.subject.other	Tenebrionidae	en
dc.subject.other	Tribolium confusum	en
dc.subject.other	Triticum aestivum	en
dc.title	Insecticidal efficacy of diatomaceous earth against Sitophilus oryzae (L.) (Coleoptera: Curculionidae) and Tribolium confusum du Val (Coleoptera: Tenebrionidae) on stored wheat: Influence of dose rate, temperature and exposure interval	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jspr.2003.12.001	en
heal.publicationDate	2005	en
heal.abstract	Laboratory experiments were conducted in order to assess the insecticidal effect of a diatomaceous earth formulation (Silicosec ®, Biofa GmbH, Germany) against Sitophilus oryzae and Tribolium confusum on stored wheat. Adults of the two species were exposed on wheat treated with diatomaceous earth at four dose rates: 0.25, 0.5, 1 and 1.5g/kg of wheat, respectively. For each dose rate, the treated wheat was placed at 22°C, 25°C, 27°C, 30°C and 32°C. Dead adults were counted after 24 and 48h, 7 and 14d of exposure. After the 14-d interval, the live adults were removed and placed for 7d in untreated wheat (in the case of S. oryzae) or untreated flour (in the case of T. confusum), and the production of F 1 was recorded. For both species, dose rate, temperature and exposure interval significantly affected mortality (P<0.001). Mortality was higher at longer exposure intervals. The efficacy of SilicoSec against S. oryzae increased with temperature, but for T. confusum mortality was lower at 32°C, compared to 30°C, for 24 and 48h exposure intervals. Tribolium confusum proved less susceptible to SilicoSec than S. oryzae. In general, the rates of 1 and 1.5g/kg of wheat provided a satisfactory level of protection against the two species examined. For S. oryzae, F 1 emerged only at 22°C, in wheat treated with 0.25 or 0.5g/kg. However, for T. confusum, F 1 were recorded at 22°C for 0.5g/kg and at 22°C, 25°C, 27°C and 30°C for 0.25g/kg. © 2004 Elsevier Ltd. All rights reserved.	en
heal.journalName	Journal of Stored Products Research	en
dc.identifier.issue	1	en
dc.identifier.volume	41	en
dc.identifier.doi	10.1016/j.jspr.2003.12.001	en
dc.identifier.spage	47	en
dc.identifier.epage	55	en