Browsing by Author "Yener, H"

Now showing 1 - 6 of 6
  • No Thumbnail Available
    Item
    Notes on the Seasonal Dynamics of Some Paederinae (Coleoptera: Staphylinidae) Species in the Vineyards of Manisa, Western Anatolia
    Anlas, S; Yener, H; Yagmur, EA
    Paederinae (Coleoptera: Staphylinidae) specimens were collected via two light traps which were established in a vineyard in Sarigol district of Manisa between April 15th and November 15th in 2018-2019 in this study. Thus, the densities and seasonal activities of the species obtained were evaluated. At the end of the study, a total of 7.274 specimens were identified based on seven species, which are Astenus melanurus (Kuster, 1853), A. procerus (Gravenhorst, 1806), Luzea graeca (Kraatz, 1857), Medon dilutus pythonissa (Saulcy, 1865), Paederus fuscipes Curtis, 1826, Scopaeus bicolor Baudi Di Selve, 1848 and S. debilis Hochhuth, 1851. It seems all recorded species are predators. The most abundant species are S. debilis with 7.006 specimens and P fuscipes with 204 specimens. The identified species were found to be intense and active especially from mid-May to the end of July in general. According to the observations during field studies, it was found that P. fuscipes species was a predator of Aphis illinoisensis Shimer, 1866 and A. gossypii Glover, 1877 (Homoptera, Aphididae) species. This species is most active at the beginning and the end of dry summer.
  • No Thumbnail Available
    Item
    Resistance of olive cultivars to Verticillium dahliae
    Sesli, M; Onan, E; Oden, S; Yener, H; Yegenoglu, ED
    Seventeen important olive cultivars have been evaluated for resistance to Verticillium dahliae under controlled conditions. One-year-old nursery olive plants were inoculated with cotton defoliating (D) (Mn 16) isolate (VCG1) of V. dahliae. Resistance was evaluated by assessing symptom severity using a 0 - 4 rating scale and estimating the area under disease progress curves. Besides, additional parameters for including cultivars into a defined category were used such as the percentage of plants killed and those which recovered from the disease. All cultivars were susceptible to isolate of V. dahliae at different levels. 'Wild 6' and 'Gemlik 2' were moderately susceptible to isolate of V. dahliae. Their resistance was evident by the plant ability to recover from infection with isolate.
  • No Thumbnail Available
    Item
    Effects of potassium fertilization on leaf nutrient content and quality attributes of sweet cherry fruits (Prunus Avium L.)
    Yener, H; Altuntas, Ö
    Cherry is a fruit preferred by consumers with its beautiful appearance, low calorie content and positive effects on human health. Turkey is the leader in cherry production due to its favorable ecological conditions. Potassium is an important nutrient which affects quality in agricultural production. 0900 Ziraat cherry was used as a test plant and cultivated in Gisela 6 rootstocks for 2 years in 2017 and 2018. The effects of different doses of potassium (K) on the quality of cherry fruit and the nutrient content of the leaves were investigated. Different doses of K (0, 100, 200, 400, 600 g K2O tree(-1)) were applied with 4 replications under the crown of 5 trees in each replication for two consecutive years. Quality characteristics in fruit samples and nutrient contents in leaf samples were determined. Fruit size, fruit firmness (FF), soluble solids (SS), titratable acidity (TA) were found to have increased with potassium doses, pH, antioxidant activity and total phenolic content were found to have decreased. The effect on the breaking force from the handle was found insignificant. Potassium application increased the potassium content of the leaves, while the highest dose of 600 g K2O tree(-1) caused a decrease in other nutrients. 600 g K2O tree(-1) application also caused a decrease in FF, SS and TA, which may result in environmental pollution, as well. It was concluded that potassium application positively affects the quality features of cherry fruit and the most appropriate dose is 400 g K2O tree(-1).
  • No Thumbnail Available
    Item
    Nutritional status of upland cotton by chemical analysis of soil and plant in a semi-arid environment
    Aydin, S; Röck-Okuyucu, B; Yener, H; Çakici, H
    Upland cotton (Gossypium hirsutum L.) is one of the major agricultural export products of Turkey. This study was carried out in the area of Denizli, a semi-arid environment, which belongs to the Aegean region of Turkey, where cotton is a major crop. Soil and cotton leaf samples (Nazilli 84) were taken from 80 representative cotton fields (two samples from each sampling point) of a total area of 281.3 ha. In the soil samples pH, CaCO3, total soluble salt and some chemical analyses (N, P, K, Ca, Mg, Fe, Zn, Mn and Cu) were carried out. In the leaf samples macro and micro elements N, P, K, Ca, Mg, Fe, Zn, Mn and Cu were analyzed. The results of the soil and leaf analyses were compared in order to determine the nutritional status of the cotton soils and plants and thus to assess the potential of the cotton soils as accurately as possible, which in turn facilitates the possibility to work out specific and appropriate fertilization programs for the region. The soil analyses showed that the soils need 41.3% N, 100% P and 57.5% K fertilization. This result was confirmed by the plant analyses. Regarding micro-elements the soil analyses indicated only Zn deficiency (98.7%), but the leaf analyses also revealed Cu deficiency and showed only partly due to former Zn foliar sprayings Zn deficiency. As high pH and high lime concentrations of the soils can negatively affect the uptake of nutrients, this factor has to be taken into account when preparing fertilization programs and choosing the fertilizer form and type.
  • No Thumbnail Available
    Item
    Notes on the Seasonal Dynamics of Polyphylla turkmenoglui Petrovitz (Coleoptera: Scarabaeidae: Melolonthinae) in the vineyards of Manisa, western Anatolia
    Yener, H; Sentürk, ÖF; Anlas, S
    Polyphylla turkmenoglui Petrovitz, 1965 is one of the the most important pests of vineyards in the Aegean Region of Turkey. Larvae of this species feed on the roots of vineyards and in general, the larvaes are found under the soil. For this reason, controlling this pest is very difficult. The adults mostly feed on pines foliage. In the study, the seasonal activity of the adult beetles of P. turkmenoglui was studied via two light traps between May and August in 2016 and 2017 in two vineyard locations in Alasehir and Sarigol districts, Manisa province of Turkey. At the end of the study, 1.552 specimens of P. turkmenoglui were evaluated. Total 362 and 1.190 specimens were collected from the localities in Alasehir and Sarigol, respectively. In spite of the small differences in trapping localities, the number of the specimens belonging to this species increased as of June, reached the highest level in mid-June and early July, and started to decrease after that date. No specimens were collected after the second half of July. In addition, the morphological features of this species, both male and female, were defined and illustrated.
  • No Thumbnail Available
    Item
    Evaluation of soil and plant health associated with successive three-year sewage sludge field applications under semi-arid biodegradation condition
    Kayikcioglu, HH; Yener, H; Ongun, AR; Okur, B
    In order to assess the suitability of sludge application for maize (Zea mays L.) soil ecosystems, this study aimed to evaluate soil microbial properties over three consecutive years using treated municipal sewage sludge (TSS) amendment in the Typic Xerofluvent Mediterranean soils of Turkey. Soil microbial properties and biochemical activities significantly increased with increasing TSS amounts. Microbial biomass carbon peaked following amendment with 30 Mg ha(-1) a(-1) of TSS, while basal soil respiration was not significantly affected by TSS doses. Moreover, soil enzyme activity increased significantly with increasing TSS amounts. A significant increase in the grain yield of 7% and 9% was found with 10 and 20 Mg TSS ha(-1) a(-1) applications respectively, whereas a significant decrease of 5% was found with 30 Mg TSS ha(-1) a(-1). Our results suggest that if the goal is to achieve plant yield in the short-term, it seems that TSS application of 20 Mg ha(-1) a(-1) can be recommended as organic fertilizer without causing potential risks. On the other hand, if the primary aim is to ensure the sustainability of the soil organic matter, the use of TSS as organic soil conditioner at a rate of 30 Mg ha(-1) a(-1) can be recommended.