Seasonal population dynamics of Typhlodromus pyri Scheuten (Acari, Phytoseiidae) in apple orchards in the region Meckenheim

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dc.contributor.authorKhan, IA
dc.contributor.authorFent, M
dc.date.accessioned2024-06-12T11:12:36Z
dc.date.available2024-06-12T11:12:36Z
dc.date.issued2005
dc.departmentTrakya Üniversitesien_US
dc.description.abstractTyphlodromus pyri Scheuten (Acari, Phytoseiidae) has been reported as the most important predator of the European red mite, Panonychus ulmi (Koch) ( Acari, Tetranychidae) in apple culture. However, biological data on T. pyri was insufficient on important parameters like seasonal population dynamics and within-tree and on-leaf distribution in apple orchards in the region of Meckenheim, Germany. The purpose of the present work was, therefore, to obtain experimental data on these parameters of T. pyri from 2000 to 2002 in the apple orchards in this region. The results showed that overwintered females of T. pyri reactivate and start laying eggs between late March and early April. The mean daily number of the different stages of T. pyri per leaf peaked in July each year, where it ranged between 0.92 - 1.68 eggs, 0.81 - 1.41 nymphs, 0.64 - 1.32 females and 0.37 - 0.52 males. A significantly higher number of T. pyri individuals congregated in the bottom layer of trees (0.34 - 0.64 individuals/leaf) than in the middle and top layers (0.23 - 0.38 and 0.12 - 0.23 individuals/ leaf, respectively). We found that 91.4 - 94.1% of the total eggs, 89.6 - 91.7% larvae, 73.0 - 76.5% nymphs, 60.5 - 64.6% adult females and 52.6 - 55.9% adult males concentrated their activities in the inner area of the leaf surface. More than 50% of the predatory mites congregated in the bottom layer in winter. Mean total density of the overwintering females in December of 2000,2001 and 2002 ranged between 10.6 - 14.2 females/5 cm twig in the bottom, 7.3 - 10.4 in the middle and 4.1 - 6.9 in the top layers of the apple trees. Mean total fecundity recorded over the 3 years was lowest in the overwintering generation with 31.8 - 37.6 eggs/female, highest in the June generation with 45.9 - 53.7 eggs/female, and intermediate in the August generation with 41.5 - 46.1 eggs/female. The overwintering generation was composed entirely of females, while the female to male ratio in the June generation was 2: 1, and in the August generation 3: 1. T. pyri overwinters as adult females in rough structures, cracks and crevices of twigs.en_US
dc.identifier.doi10.1007/s10340-004-0049-2
dc.identifier.endpage6en_US
dc.identifier.issn1612-4758
dc.identifier.issn1612-4766
dc.identifier.issue1en_US
dc.identifier.scopus2-s2.0-13444259866en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1en_US
dc.identifier.urihttps://doi.org/10.1007/s10340-004-0049-2
dc.identifier.urihttps://hdl.handle.net/20.500.14551/23240
dc.identifier.volume78en_US
dc.identifier.wosWOS:000226556300001en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringer Heidelbergen_US
dc.relation.ispartofJournal Of Pest Scienceen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectPopulation Dynamicsen_US
dc.subjectTyphlodromus Pyrien_US
dc.subjectAppleen_US
dc.subjectPanonychus Ulmien_US
dc.subjectMetaseiulus-Occidentalisen_US
dc.subjectEuseius-Finlandicusen_US
dc.subjectPanonychus-Ulmien_US
dc.subjectMites Acarien_US
dc.subjectTetranychidaeen_US
dc.subjectPersistenceen_US
dc.subjectPredationen_US
dc.subjectPreyen_US
dc.titleSeasonal population dynamics of Typhlodromus pyri Scheuten (Acari, Phytoseiidae) in apple orchards in the region Meckenheimen_US
dc.typeArticleen_US

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