Browsing by Author "Yasar, B"

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Development, Feeding and Reproduction Responses of Adalia Fasciatopunctata Revelierei(Mulsant) (Coleoptera: Coccinellidae) To Hyalopterus Pruni(Geoffroy) (Homoptera: Aphididae)
(Springer Heidelberg, 2005) Yasar, B; Özger, S
This study was carried out to determine the development, survival and reproduction responses of Adalia fasciatopunctata revelierei (Mulsant) (Coleoptera: Coccinellidae) feeding on Hyalopterus pruni (Geoffroy) (Homoptera: Aphididae), using 20, 40, 80, 160 and 250 prey densities. All experiments were conducted at 25 +/- 1 degrees C, 60 +/- 5% relative humidity, 16:8 light:dark under laboratory conditions. The average daily prey consumption of A. fasciatopunctata revelierei immatures and adults increased with increasing prey densities. Predation was not different for the larval stages at 80, 160 and 250 prey densities. The longevities of adult females were 35.67, 35.33, 49.00, 58.33 and 57.16 days when 20, 40, 80, 160 and 250 H. pruni were provided, respectively. The mean daily and total fecundity of A. fasciatopunctata revelierei increased with increasing prey densities. Females of A. fasciatopunctata revelierei feeding on H. pruni laid 89 eggs at 20 prey density and 301.67 eggs at 160 prey density. The search rate of females was higher than that of all larval instars; and the search rate of the fourth-instar larvae was higher than that of younger instars. Handling time decreased with development from larval stages to adult.
Determination of Life Table and Biology of Colorado Potato Beetle, Leptinotarsa Decemlineata Say (Coleoptera: Chrysomelidae), Feeding on Five Different Potato Varieties in Turkey
(Japan Soc Appl Entomol Zool, 2005) Yasar, B; Güngör, MA
This study was carried out to determine the nourishment preference and life table of the larvae and adults of Leptinotarsa decemlineata on the potato varieties of Agria, Pasinler, Marfona, Granola and Caspar. While the longest development duration in L. decemlineata was observed on the Granola variety, the shortest one was detected on the Caspar variety. The highest egg mortality in the Colorado potato beetle occurred on the Marfona variety, while the lowest mortality occurred on the Pasinler variety. The total mortality of immature stages of L. decemlineata was the highest on the Marfona variety and the lowest was on the Caspar variety. The highest larval mortalities were observed in the first larval stages. The highest daily fecundities on potato varieties were on the Granola variety and the highest total fecundities were on the Pasinler variety. However, the lowest values for both characteristics were on the Agria variety. The descending order of intrinsic rates of increase was Pasinler, Caspar, Agria, Marfona and Granola potato varieties. The highest net reproductive rates were on the Caspar variety and the lowest rates were on the Granola variety. The generation time was the longest in the Caspar variety and the shot-test in the Pasinler variety. The Colorado potato beetle showed the least performance on the Marfona potato variety when considering the mortality of eggs and immature stages, total fecundity and net reproductive rate.