2007 Cilt 1 Sayı 3

Permanent URI for this collectionhttps://hdl.handle.net/11452/16887

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Browsing by Department "Ziraat Fakültesi"

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    Life tables of the olive leaf moth, Palpita unionalis (Hübner) (Lepidoptera: Pyralidae), on different host plants
    (Uludağ Üniversitesi, 2007-12-01) Kumral, Nabi Alper; Kovancı, Bahattin; Akbudak, Bülent; Ziraat Fakültesi; Bitki Koruma Bölümü
    The olive leaf moth, Palpita unionalis (Hübner), is an important pest on olives, and also feeds on other host plants from the Oleaceae family. In this study, the development, survival and reproduction of P. unionalis were evaluated in the laboratory at 25°C and photoperiod of L:D = 16:8 on three host plants: olive (Olea europea L., cv. Gemlik), ash (Fraxinus angustifolia Vahl.) and jasmine (Jasminum fruticans L.). Olive leaf moth larvae survived on all three host plants. The developmental time of immature stages ranged from 27.52 days on ash leaves to 30.00 days on olive leaves. Immature survival from egg to pupa was 72% on jasmine, 73% on olive and 74% on ash. The average number of eggs oviposited by adults from larvae reared on ash, jasmine and olive were 194.7, 321.8 and 390.3, respectively. The net reproductive rate of this species varied from 129.8 females/female on ash to 298.3 on olive. The intrinsic rate of population increase on ash, jasmine and olive was 0.148, 0.149 and 0.163 females/female/day, respectively. Palpita unionalis can complete its life cycle on all host plants, but ash was relatively less suitable because of the lower reproductive rate of the insects reared on it.
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    The relationship between growth traits and egg weight in Pheasants (P. colchicus)
    (Uludağ Üniversitesi, 2007-12-01) İpek, Aydın; Dikmen, Bilgehan Yılmaz; Keles Meslek Yüksekokulu; Hayvan Sağlığı ve Yetiştiriciliği Bölümü
    The research was conducted to determine relationship between growth traits and egg weight in Pheasants (Phasianus colchicus). Pheasant eggs were separated into 3 weight groups. The eggs were classified as light (27.8-29.7g), medium (29.8-31.7g), heavy (31.8- 33.7g) weight. Eggs were incubated at 36.5 °C and 90 % relative humidity for 21 days during at which they were rotated hourly at an angle of 45°. Thereafter; these eggs were transferred into hatching machine during the last three days. A temperature of 36.0°C and relative humidity of 95 % were provided for the eggs at hatching period. Chicks at hatching were placed in separated pens as male and female mixed for each egg weight group. The effect of egg weight on chick weight at hatching, mean live weight, weight gain, feed consumption and feed efficiency were found significant (P<0.01). The effect of egg weight on mortality was not significant. The chick weight at hatching in light, medium and heavy egg groups were determined as 19.5, 21.8 and 22.6 g, respectively. In the egg weight X sex groups the mean live weights were determined as 940.2, 1020.5, 1091.2 g for males and 705.6, 739. 4, 778.6 g for females, respectively at 16th wks of age. In the groups the mean feed consumption and feed efficiency were found 4200.6, 4600.8, 5080.1 g and 5.1, 5.2, 5.4 kg, respectively, at 16th wks of age mixed male and female pheasant.
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    Some parameters in relation to iron nutrition status of peach orchards
    (Uludağ Üniversitesi, 2007-12-01) Çelik, Hakan; Katkat, A. Vahap; Ziraat Fakültesi; Toprak Bilimi ve Bitki Besleme Bölümü
    This study was conducted to determine DTPA extractable iron contents and some soil properties of peach (Prunus persica L.) orchards, total and 1N HCl extractable iron contents of leaves and investigate their relations with chlorosis. For this purpose, nine peach orchards, each of which included green, slightly chlorotic and severe chlorotic peach trees, were selected. Soil and leaf samples were taken from these orchards for chemical analysis. Soil samples were collected from the top 30 cm and from a 30-60 cm depth from the soils under the peach trees variously affected by iron induced chlorosis. Soil analysis revealed that results, in the top 30 cm, soil extractable iron contents were negatively correlated with pH, EC and lime (r= -0.260*, -0.621** and -0.298**) respectively. Negatively significant correlations between extractable iron and exchangeable cations, were also found, but correlations were positively significant with organic matter at both soil depths (r=0.595**, 0.608**). Most of the DTPA extractable soil iron contents were found higher than the critical concentration range (4.5 mg kg-1) despite visually and analytically iron chlorosis determined in the plants. DTPA method is not capable of estimating and monitoring of iron chlorosis in the plants grown on calcareous soils. 1 N HCl extractable active iron contents of the leaves were found relevant with the chlorosis degrees (r= -0.839**) and recognized as a better nutritional iron indicator than total iron.