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Öğe Effects of two plant extracts on the damage of Meloidogyne incognita in tomato plants [İki bitki ekstrakti{dotless}ni{dotless}n domates bitkilerinde Meloidogyne incognita, chitwood (Nematoda: Heteroderidae) zarari{dotless}na etkileri](2009) Kaşkavalci G.; Civelek H.S.The effects of the aqueous extracts of Euphorbia myrsinites (Euphorbiaceae) and Urginea maritima (Liliaceae) on the damage of Meloidogyne incognita (Nematoda: Heteroderidae) to tomato plants was evaluated. The trials were conducted in two series in climatized rooms and in greenhouse conditions. The results of both the climatized rooms and greenhouse trials are parallel each other. All dilutions (1:100, 2:100 and 4:100 v v-1) of the extracts applied to the soil reduced the root galling caused by M. incognita and enhanced tomato yield compared to an untreated control. Efficacy of the highest concentration (4:100 v v-1) of both extracts on the control of M. incognita was similar to the positive chemical control (Oxamyl). The highest concentration of U. maritima was superior to the extracts of E. myrsinites. Aqueous extracts from these two plants reduced the damage of root-knot nematodes.Öğe Population densities of Liriomyza huidobrensis (Blanchard, 1926) (Diptera: Agromyzidae in insecticide-treated and non-treated cucumber producing greenhouses in the Izmir region [·Izmir'de Insektisit Kullanilan ve Kullanilmayan Hiyar Üretim Seralarinda Liriomyza huidobrensis (Blanchard, 1926) (Diptera: Agromyzidae)'in Populasyon Yogunlugu](TUBITAK, 2003) Civelek H.S.; Yoldaş Z.Liriomyza huidobrensis (Blanchard) (Diptera: Agromyzidae) is an important pest in cucumber greenhouse in Çamönü (Menderes, Izmir), Turkey. This study was carried out during the spring and autumn production seasons in 1999 and 2000 in two greenhouses belonging to a local farmer, each of them 1000 m2 in size. The infested leaves from insecticide-treated and non-treated greenhouses were sampled weekly. The leaves were sampled weekly from both greenhouses and kept in our laboratory under observation to compare the number of emerging leafminer adults. Despite the applications, during three of the four seasons examined, pest density in the insecticide-treated greenhouse was not maintained below the economical threshold by insecticide applications. The overall differences between the number of adults in insecticide-treated and non-treated greenhouses were in fact minimal. During the first year there were significant differences in the density of leafminer populations, but during the second year there were no significant differences. The results of this study led us to the conclusion that non-chemical methods should be used Instead of insecticides to control L. huidobrensis in cucumber greenhouses in the Menderes region.Öğe Seasonal population trends of Liriomyza huidobrensis (Blanchard, 1926) (Diptera: Agromyzidae) on cucumber (Cucumis sativus L.) in Western Turkey(2004) Civelek H.S.; Yoldaş Z.; Ulusoy M.R.Liriomyza huidobrensis (Blanchard) (Diptera: Agromyzidae) is an important pest in cucumber greenhouses in Izmir, Western Turkey. This study was carried out during the spring and autumn seasons of 1999 and 2000 in two adjacent cucumber greenhouses, each 1,000 m2 in size. Population densities of adult L. huidobrensis in insecticide-treated and non-treated greenhouses were compared by using yellow sticky traps. Ten traps were placed in the non-treated greenhouse and ten traps in the insecticide-treated greenhouse. Yellow sticky traps were changed weekly and the number of flies counted in order to compare the two greenhouses. In addition to monitoring the leaf miner population, in each greenhouse 100 plants were checked and the ratio of infested plants, the ratio of infested leaves per plant and the number of mines per leaf were recorded weekly. The population density of the leaf miner was almost the same in both insecticide treated and non-treated greenhouses. Thus, it was concluded that using yellow sticky traps will be healthier and more cost effective than using pesticides. Furthermore using pesticides is risky for the environment and the use of yellow sticky traps can easily reduce the number of pesticide applications. If yellow sticky traps are used in the greenhouse in a completely isolated environment and the appropriate insecticide is used when it is necessary, this will provide successful and integrated management against L. huidobrensis. © Springer-Verlag 2004.
