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  • Küçük Resim
    Öğe
    Doğu Akdeniz bölgesi örtü altı sebze yetiştiriciliğinde pamuk beyazsineği, Bemisia tabaci genn. (Homoptera:Aleyrodidae)'nin biyolojik mücadelesinde avcı böcek, Serangium parcesetosum sicard (Coleoptera:Coccinellidae)'un kullanılabilme imkânlarının araştırılması
    (Selçuk Üniversitesi Fen Bilimleri Enstitüsü, 2007-09-10) Kütük, Halil; Alaoğlu, Özdemir
    Bu çalısmada, avcı böcek, Serangium parcesetosum Sicard. (Coleoptera, Coccinellidae)'un, örtü altı patlıcan yetistiriciliginin önemli sorunlarından birisi olan Pamuk beyazsinegi, Bemisia tabaci Genn. (Homoptera, Aleyrodidae) üzerindeki etkinligi ısıtmasız sera ve laboratuar sartlarında arastırılmıs; ayrıca avcı böcegin endemik parazitoit, Eretmocerus mundus Mercet (Hymenoptera: Aphelinidae) tarafından parazitlenmis av ile olan etkilesimi laboratuar sartlarında belirlenmistir. Salım çalısmalarında B. tabaci ile bulasık patlıcan serasına, S. parcesetosum 2 veya 4 ergin avcı / bitki oranlarında salınarak, avcı böcek ve zararlının populasyonları birlikte takip edilmistir. Bunlara ek olarak S. parcesetosum'un B. tabaci `yi baskı altına almadaki basarısını ölçmek amacıyla her deneme sonunda zararlının patlıcanın yaprakları üzerinde sebep oldugu fumajinlenme indeks degerleri de belirlenmistir. Salım çalısmalarında baslangıçtaki av yogunluguna baglı olarak, S. parcesetosum'un 2 veya 4 ergin / bitki oranlarında salımının, sera ortalama sıcaklıgının 20°C'nin üzerinde seyrettigi durumlarda Pamuk beyazsinegi populasyonunu 14 ilâ 21 günde baskı altına alabildigi ve salım parsellerinde fumajinlenmenin önlendigi belirlenmistir. Avcı böcegin ergin ve larva (L4) dönemlerinin, içerisinde parazitoit, E. mundus pupası bulunan B. tabaci larva veya pupası ile beslenmedigi ortaya konmustur.
  • Küçük Resim Yok
    Öğe
    The effect of season on the levels of predation by the ladybird Serangium parcesetosum Sicard (Coleoptera: Coccinellidae) on the cotton whitefly Bemisia tabaci (Genn.) (Homoptera: Aleyrodidae), a serious pest of eggplants
    (SPRINGER HEIDELBERG, 2008) Kütük, Halil; Yiğit, Abdurrahman; Alaoğlu, Özdemir
    The whitefly Bemisia tabaci is a serious pest of eggplants, especially those grown undercover in polytunnels and greenhouses. Due to increasing levels of resistance of B. tabaci to a wide range of insecticides, there is now an urgent need to explore other non-chemical methods of control. In this study, Serangium parcesetosum, a ladybird, was evaluated as a possible biological control agent of B. tabaci's winter and spring populations which infests eggplants grown undercover in Turkey. It was found that in winter, S. parcesetosum failed to control B. tabaci, even when the ladybird population was augmented six times over the course of the experiment. This contrasted with that observed in spring when, with only one introduction of the ladybird, control of the pest was gained within 3 weeks after release. In spring, the B. tabaci population in the cages receiving two and four S. parcesetosum adult per plant showed 56 and 53% reduction, respectively. The percent reduction in B. tabaci population rose to 98.6 and 98.3% in both cages, respectively, by the end of experiment. It is suggested that release of S. parcesetosum against B. tabaci during spring months may be offered as an alternative solution to increase implementation of biologically based B. tabaci management. In winter other biological control agents are needed and these need to be further explored.
  • Küçük Resim Yok
    Öğe
    Evaluation of the lady beetle, Serangium parcesetosum for control of Bemisia tabaci on greenhouse eggplant in the Mediterranean region
    (TAYLOR & FRANCIS LTD, 2008) Kütük, Halil; Alaoğlu, Özdemir; Yiğit, Abdurrahman
    Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae) is one of the most serious pests of greenhouse crops. It is mainly controlled by chemical means, requiring some 10-12 sprays during the average growing season in Turkey. There is growing interest in finding alternatives to pesticides for control of B. tabaci in greenhouse crops because this heavy pesticide usage disrupts biocontrol and leads to rapid build-up of insecticide resistance in the pest. In our study, the control of B. tabaci on greenhouse eggplants was evaluated following releases of the lady beetle Serangium parcesetosum Sicard (Coleoptera: Coccinellidae). In cage experiments, four adults per plant were introduced and, within 3-4 weeks, resulted in 97 and 98% reductions in whitefly populations in 2004 and 2005, respectively. In a large plot experiment, two adults per plant were released only one time. Beetle larvae were observed through 2-9 weeks after release. The density of whitefly in large plot receiving beetle adults showed fluctuations to a level lower than in control plot receiving no beetle in 2004 and 2006. Further study is needed to develop new managing strategies in biological control of B. tabaci with S. parcesetosum in protected culture.
  • Küçük Resim Yok
    Öğe
    Intraguild predation of Serangium parcesetosum (Coleoptera: Coccinellidae), on whitefly Bemisia tabaci (Homoptera: Aleyrodidae) parasitized by Eretmocerus mundus (Hymenoptera: Aphelinidae)
    (TAYLOR & FRANCIS LTD, 2011) Kütük, Halil; Yiğit, Abdurrahman; Alaoğlu, Özdemir
    We studied intraguild predation of Serangium parcesetosum on Eretmocerus mundus, both natural enemies of Bemisia tabaci, on eggplant under laboratory conditions. Fourth instar and adult predators attacked parasitized and unparasitized hosts equally if immature parasitoids were larvae, but avoided predating on parasitized hosts containing pupae.