Influence of temperature and humidity on the efficacy of spinosad against four stored-grain beetle species

dc.contributor.author	Athanassiou, CG	en
dc.contributor.author	Kavallieratos, NG	en
dc.contributor.author	Yiatilis, AE	en
dc.contributor.author	Vayias, BJ	en
dc.contributor.author	Mavrotas, CS	en
dc.contributor.author	Tomanovic, Z	en
dc.date.accessioned	2014-06-06T06:48:33Z
dc.date.available	2014-06-06T06:48:33Z
dc.date.issued	2008	en
dc.identifier.issn	15362442	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/4184
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-55349117010&partnerID=40&md5=57aca7b3fe8227fcfc35e73781141737	en
dc.subject	Abiotic conditions	en
dc.subject	Grain protectants	en
dc.subject	Maize	en
dc.subject	Prostephanus truncatus	en
dc.subject	Rhyzopertha dominica	en
dc.subject	Sitophilus oryzae	en
dc.subject	Spinosad	en
dc.subject	Tribolium confusum	en
dc.subject	Wheat	en
dc.subject.other	Bostrichidae	en
dc.subject.other	Coleoptera	en
dc.subject.other	Curculionidae	en
dc.subject.other	Oryzaephilus	en
dc.subject.other	Prostephanus truncatus	en
dc.subject.other	Rhyzopertha dominica	en
dc.subject.other	Sitophilus oryzae	en
dc.subject.other	Tenebrionidae	en
dc.subject.other	Tribolium (beetle)	en
dc.subject.other	Tribolium confusum	en
dc.subject.other	Triticum aestivum	en
dc.subject.other	Zea mays	en
dc.subject.other	insecticide	en
dc.subject.other	macrolide	en
dc.subject.other	spinosad	en
dc.subject.other	analysis of variance	en
dc.subject.other	animal	en
dc.subject.other	article	en
dc.subject.other	beetle	en
dc.subject.other	drug combination	en
dc.subject.other	humidity	en
dc.subject.other	temperature	en
dc.subject.other	wheat	en
dc.subject.other	Analysis of Variance	en
dc.subject.other	Animals	en
dc.subject.other	Beetles	en
dc.subject.other	Drug Combinations	en
dc.subject.other	Humidity	en
dc.subject.other	Insecticides	en
dc.subject.other	Macrolides	en
dc.subject.other	Temperature	en
dc.subject.other	Triticum	en
dc.title	Influence of temperature and humidity on the efficacy of spinosad against four stored-grain beetle species	en
heal.type	journalArticle	en
heal.identifier.secondary	60	en
heal.publicationDate	2008	en
heal.abstract	In the present work, we examined the insecticidal effect of spinosad, against adults of the lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae), the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae), the confused flour beetle, Tribolium confusum Jacquelin du Val (Coleoptera: Tenebrionidae) on wheat and the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrychidae) on maize. The dose rates used were 0.01, 0.1, 0.5 and 1 ppm. The bioassays were carried out at three temperatures, 20, 25 and 30°C and two relative humidity levels, 55 and 75%. Mortality of R. dominica and S. oryzae was high even at 0.01 ppm of spinosad, reaching 100% at 55% relative humidity and 30°C after 21 days of exposure. Generally, mortality of R. dominica, increased with temperature while for S. oryzae mortality increased with temperature and with the decrease of relative humidity. Moreover, for S. oryzae, mortality was low at 20°C. In the case of T. confusum, mortality was low at doses between 0.01 and 0.5 ppm even after 21 days of exposure. At 1 ppm, mortality exceeded 90% only at 30°C and only after 21 days of exposure. Mortality of P. truncatus was low on maize treated with 0.01 ppm, but increasing the dose to 0.1 ppm resulted in > 87% mortality after 14 days of exposure. In several combinations tested, spinosad efficacy notably varied according to the temperature and humidity regimes. Of the species tested, R. dominica and P. truncatus were very susceptible to spinosad, followed by S. oryzae, while T. confusum was the least susceptible.	en
heal.journalName	Journal of Insect Science	en
dc.identifier.volume	8	en