Abstract
The life table parameters of Tetranychus urticae were evaluated on 7 eggplant cultivars namely, Anamur, Aydin Siyahi, Balikesir 76, Kemer, Pala 49, Topan 374, Yalova Topan, in controlled laboratory conditions in day ight for 16 hours 27 +/- 1 °C temperature, 65% relative humidity. Assays were conducted on eggplant leaflets in Petri dishes. There was a significant difference in the durations of egg and juvenile development of T. urticae. However the survival rates of T. urticae were not significantly different on the tested eggplant cultivars. The values of the natural rate of increase, rm, (0.218-0.269), net reproduction rate, R0, (26.74-45.51) and the mean generation time, T, (13.31-15.45) significantly differed among eggplant cultivars. Notably, the shortest development duration as indicated by the lowest rm and R0 values were observed on Pala 49 followed by Anamur and Balikesir 76 cultivars.
Highlights
Significant differences were observed for the total development time of T. urticae feeding on different eggplant cultivars (F13,460 = 21.51; P < 0.01)
The present study indicated that eggplants are one of the favourable hosts for T. urticae, allowing shorter development durations of the immature stages
The immature developmental time was very similar with the values (9.1-11.2) reported by Khanamani et al (2013) on seven Indian eggplant cultivars
Summary
More than thirty mite species have been identified on eggplants Solanum melongena L. (Solanaceae) around the world (Cobanoglu 1989, Grewal 1992, Kapoor et al 1997, Singh & Singh 1999, Kumral & Kovanci 2005, Can & Cobanoglu 2010, Ozsisli & Cobanoglu 2011, Reddy et al 2011, Kumral & Cobanoglu 2016). Tetranychus urticae is a common eggplant pest (Grbic et al 2011, Migeon & Dorkeld 2016) Both red and green morphological forms of the spider mite are very harmful to Solanaceous (Soysal & Yayla 1988, Grewal 1992, Kapoor et al 1997, Brar et a.l 2003, Leite et al 2003, Kumral & Kovanci 2005, Ozsisli & Cobanoglu 2011, Can & Cobanoglu 2010). As an alternative to pesticides, predator mites, phytoseiides, have been commercially produced and used for controlling T. urticae particullary in greenhouses
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