Acaricidal effect of a diatomaceous earth formulation against Tyrophagus putrescentiae (Astigmata: Acaridae) and its predator Cheyletus malaccensis (Prostigmata: Cheyletidae) in four grain commodities

dc.contributor.author	Palyvos, NE	en
dc.contributor.author	Athanassiou, CG	en
dc.contributor.author	Kavallieratos, NG	en
dc.date.accessioned	2014-06-06T06:46:57Z
dc.date.available	2014-06-06T06:46:57Z
dc.date.issued	2006	en
dc.identifier.issn	00220493	en
dc.identifier.uri	http://dx.doi.org/10.1603/0022-0493(2006)099[0229:AEOADE]2.0.CO;2	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/3328
dc.subject	Cheyletus malaccensis	en
dc.subject	Diatomaceous earth	en
dc.subject	Stored wheat	en
dc.subject	Tyrophagus putrescentiae	en
dc.subject.other	infusorial earth	en
dc.subject.other	insecticide	en
dc.subject.other	Acaridae	en
dc.subject.other	analysis of variance	en
dc.subject.other	animal	en
dc.subject.other	article	en
dc.subject.other	bioassay	en
dc.subject.other	biological pest control	en
dc.subject.other	cereal	en
dc.subject.other	comparative study	en
dc.subject.other	drug effect	en
dc.subject.other	mite	en
dc.subject.other	parasitology	en
dc.subject.other	physiology	en
dc.subject.other	Poaceae	en
dc.subject.other	predation	en
dc.subject.other	temperature	en
dc.subject.other	time	en
dc.subject.other	Acaridae	en
dc.subject.other	Analysis of Variance	en
dc.subject.other	Animals	en
dc.subject.other	Biological Assay	en
dc.subject.other	Cereals	en
dc.subject.other	Diatomaceous Earth	en
dc.subject.other	Insecticides	en
dc.subject.other	Mites	en
dc.subject.other	Pest Control, Biological	en
dc.subject.other	Poaceae	en
dc.subject.other	Predatory Behavior	en
dc.subject.other	Temperature	en
dc.subject.other	Time Factors	en
dc.subject.other	Acari	en
dc.subject.other	Acaridae	en
dc.subject.other	Astigmata	en
dc.subject.other	Avena fatua	en
dc.subject.other	Cheyletidae	en
dc.subject.other	Cheyletus malaccensis	en
dc.subject.other	Prostigmata	en
dc.subject.other	Secale cereale	en
dc.subject.other	Triticum aestivum	en
dc.subject.other	Tyrophagus putrescentiae	en
dc.subject.other	Zea mays	en
dc.title	Acaricidal effect of a diatomaceous earth formulation against Tyrophagus putrescentiae (Astigmata: Acaridae) and its predator Cheyletus malaccensis (Prostigmata: Cheyletidae) in four grain commodities	en
heal.type	journalArticle	en
heal.identifier.primary	10.1603/0022-0493(2006)099[0229:AEOADE]2.0.CO;2	en
heal.publicationDate	2006	en
heal.abstract	Laboratory bioassays were conducted to evaluate the effect of the diatomaceous earth (DE) formulation SilicoSec (Biofa GmbH, Münsingen, Germany), against two stored-product mite species, Tyrophagus putrescentiae (Shrank) and the predator Cheyletus malaccensis Oudemans. For this purpose, DE was applied in wheat, oat, rye, and maize, at the dose rates 0, 0.5, 1, and 2 g/kg grain. The mortality of the exposed mites was assessed after 24 h, 48 h, 7 d, and 14 d of exposure in the treated substrate. After this interval, the treated grains were checked for oviposition or progeny. The tests were conducted at 80% RH and at two temperatures, 20 and 25°C. Generally, for both species, mortality was higher at 25°C than at 20°C. For T. putrescentiae, at both temperatures, the mortality in grains treated with the highest DE rate was 100% after only 24 h of exposure, with the exception of maize at 20°C, where mortality was 91.7%. The mortality of C. malaccensis after 24 h of exposure to the treated grains, in the absence of prey, did not exceed 29% at any of the temperature-grain- dose combinations, whereas no mites were dead in rye and maize treated with 0.5 and 1 g of DE. Even after 14 d of exposure at the highest DE rate, mite mortality did not reach 100%. The presence of T. putrescentiae individuals as prey in the treated substrate enhanced C. malaccensis survival. Hence, after 14 d of exposure, the mortality of C. malaccensis, in wheat, oat, rye, and maize treated with the highest DE rate was 51.7, 59.7, 70, and 36.9, respectively. No progeny production was recorded in the treated substrate for T. putrescentiae; in contrast, oviposition and F1 progeny were recorded for C. malaccensis. Our results suggest that the use of C. malaccensis with low doses of DE may be an appealing integrated pest management (IPM) approach against T. putrescentiae, and probably against other stored-grain mite species. © 2006 Entomological Society of America.	en
heal.journalName	Journal of Economic Entomology	en
dc.identifier.issue	1	en
dc.identifier.volume	99	en
dc.identifier.doi	10.1603/0022-0493(2006)099[0229:AEOADE]2.0.CO;2	en
dc.identifier.spage	229	en
dc.identifier.epage	236	en