Browsing by Author "Sekeroglu, E"

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The Potential of the Hatay Population of Phytoseiulus Persimilis To Control the Carmine Spider Mite Tetranychus Cinnabarinus in Strawberry in Silifke Icel, Turkey
(Springer, 2002) Kazak, C; Karut, K; Kasap, I; Kibritci, C; Sekeroglu, E
The Hatay population of the predatory mite Phytoseiulus persimilis Athias-Henriot was released into a commercial field of cv. 'Chandler' strawberries for the control of Tetranychus cinnabarinus Boisduval (Acari: Phytoseiidae: Tetranychidae) in 2000 and 2001 in Silifke county of Icel on the East Mediterranean coast of Turkey. In 2000, populations of T. cinnabarinus were recorded in the field from the beginning of March in most plots, and increased gradually until mid-May. T. cinnabarinus populations declined to very low levels in all predator release plots approximately 2 weeks after reaching a peak. In general, predator populations rose linearly as the population densities of spider inites increased until mid-May. P. persimilis numbers peaked during the period 16-23 May. A similar scenario developed in 2001, but because of the relatively high number of T. cinnabarinus in all plots at the beginning of the experiment, both T. cinnabarinus and P persimilis peaked almost one month earlier than in 2000. In both years, the Hatay population of P. persimilis demonstrated good potential for the control of Ecinnabarinus in field-grown strawberry in the Silifke region of Icel.
Life History of Euseius Scutalis Feeding on Citrus Red Mite Panonychus Citri at Various Temperatures
(Springer, 2004) Kasap, I; Sekeroglu, E
The aim of this study was to determine the biology and reproductive potential of Euseius scutalis (Athias-Henriot) (Acari: Phytoseiidae) at various temperatures. These data are of value in relation to mass rearing and the development of population dynamics models. The development time, survival and fecundity of E. scutalis were determined at 20, 25 and 30 +/- 1 degreesC, 65 +/- 10% RH and 16:8 photoperiod. Total development times of E. scutalis were 6.7, 4.9 and 4.2 days at 20, 25 and 30 +/- 1 degreesC, respectively, using a diet of all life stages of the spider mite Panonychus citri (McGregor) (Acari: Tetranychidae). In general, preoviposition and postoviposition periods of E. scutalis were shortened as temperature increased, but the oviposition period was longer at 25 degreesC than at 20 and 30 degreesC. The shortest survival time of E. scutalis, at 30 degreesC, was 10.1 days, followed by 23.7 days and 28.6 days at 20 and 25 degreesC, respectively. Mated females laid on average 1.1, 1.4 and 1.7 eggs per female per day and 21.5, 39.7 and 17.1 eggs over their entire life time at 20, 25 and 30 degreesC, respectively. The sex ratios of E. scutalis were 2.11/1, 2.24/1 and 2.11/1 female/male at 20, 25 and 30 degreesC, respectively. The intrinsic rate of natural increase (r(m)) increased with rising temperatures from 0.166 at 20 degreesC to 0.295 females/female/day at 30 degreesC. The net reproductive rate (R-0) was highest at 25 degreesC (26.03 females/female) and lowest at 30 degreesC (12.95 females/female). Mean generation time (T-0) was longest at 25 degreesC (17.50 days) and shortest (9.53 days) at 30 degreesC.