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Effects of Neem-Based and Chemical Insecticides on Some Arthropods in Alfalfa

dc.authorscopusid 6603433461
dc.authorscopusid 55469288700
dc.authorscopusid 6506033137
dc.contributor.author Yardim, E.N.
dc.contributor.author Ozgen, I.
dc.contributor.author Kulaz, H.
dc.date.accessioned 2025-05-10T17:50:56Z
dc.date.available 2025-05-10T17:50:56Z
dc.date.issued 2001
dc.department T.C. Van Yüzüncü Yıl Üniversitesi en_US
dc.department-temp Yardim E.N., Yuzuncu Yil Universitesi, Ziraat Fakultesi, Bitki Koruma Bolumu, Van, 65080, Turkey; Ozgen I., Yuzuncu Yil Universitesi, Ziraat Fakultesi, Bitki Koruma Bolumu, Van, 65080, Turkey; Kulaz H., Yuzuncu Yil Universitesi, Ziraat Fakultesi, Bitki Koruma Bolumu, Van, 65080, Turkey en_US
dc.description.abstract In this study, we tested the effects of two different doses of neem (azadirachtin) on the alfalfa weevil, Hypera variabilis Hbst. (Coleoptera: Curculionidae), aphids and predators (Coccinellids, anthocorids, chrysopids and spiders) and compared the effects with those of a broad spectrum insecticide (malathion) in a controlled experiment in 1998 and 1999. Malathion treatments reduced alfalfa weevil densities significantly (p < 0.01) by 77.9 and 87.4% in 1998 and 1999, respectively. Alfalfa weevil numbers in the low dose neem-treated plots were lower by 45.2% in 1998 and 50.2% in 1999. There were 45.3% fewer alfalfa weevils in the high dose neem-treated plots in 1999. In 1998, aphid numbers were reduced by 11.1, 25.3 and 41% in the low dose neem-treated plots, the malathion-treated plots and the high dose neem-treated plots, respectively. Aphids were more abundant in the malathion-treated plots, whereas they were fewer in the neem-treated plots compared to the control in 1999. The treatments did not have any significant effects on the total numbers of predators. en_US
dc.identifier.endpage 524 en_US
dc.identifier.issn 1373-7503
dc.identifier.issue 2 a en_US
dc.identifier.pmid 12425073
dc.identifier.scopus 2-s2.0-0035756670
dc.identifier.scopusquality N/A
dc.identifier.startpage 519 en_US
dc.identifier.uri https://hdl.handle.net/20.500.14720/17911
dc.identifier.volume 66 en_US
dc.identifier.wosquality N/A
dc.language.iso en en_US
dc.relation.ispartof Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) en_US
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı en_US
dc.rights info:eu-repo/semantics/closedAccess en_US
dc.title Effects of Neem-Based and Chemical Insecticides on Some Arthropods in Alfalfa en_US
dc.type Article en_US

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