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    Effect of Releasing the Parasitoid, Aphidius colemani (Hymenoptera: Braconidae) on Suppression of Myzus persicae (Hemiptera: Aphididae) Populations in Eggplants
    (Friends Science Publ, 2018) Karacaoglu, Mehmet; Kececi, Mehmet; Yarpuzlu, Ferda; Kutuk, Halil
    In Turkey, the polyphagous aphid, Myzus persicae Sulz. (Hemiptera: Aphididae) causes economic damages to eggplant. The solitary koinobiont parasitoid, Aphidius colemani Viereck (Hymenoptera: Braconidae) is the mainly used parasitoid and commercially available in greenhouse crops. This study investigated the efficacy of A. colemani to suppress M. persicae on greenhouse grown eggplant during early fall and spring seasons. Both early fall and spring plastic greenhouse experiments showed that A. colemani significantly reduced aphid densities compared with the control treatment, but aphids' density was over the economic threshold in release treatment. The maximum parasitism rates achieved in early fall and spring experiments were 38.84 and 94.6%, respectively. Various factors, affect the efficacy of the parasitic wasp (A. colemani) on eggplants were discussed. (C) 2018 Friends Science Publishers
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    Possibilities for biological control of Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae) in the western Mediterranean Region of Turkey
    (Entomological Soc Turkey, Ege Univ, 2017) Kececi, Mehmet; Oztop, Ali
    After Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae) was first detected in 2009, it quickly became the dominant pest in tomato-growing areas of Turkey. Both its feeding behavior and resistance to insecticides has forced growers to use alternative control measures. This study examined the effectiveness of individual and combined use of the predatory insect, Nesidiocoris tenuis (Reuter, 1895) (Hemiptera: Miridae) and the egg parasitoid, Trichogramma evanescens Westwood, 1833 (Hymenoptera: Trichogrammatidae) as biological control measures in the western Mediterranean Region of Turkey. For this purpose, greenhouse trials were conducted in a single-crop tomato cultivation period between 2011-2012 and 2013-2014. A reduction in infested fruit of 95.1 and 94.5% was achieved, respectively, in plots where N. tenuis and T. evanescens were released together. However, no significant difference was found between the plots with N. tenuis alone and the combination of N. tenuis and T. evanescens.