Bifora radians M. Bieb. Dünya genelinde çok geniş yayılım alanı bulan Asya’ya özgü tek yıllık bir yabancı ottur. Geniş bir ekolojik toleransının ve yüksek rekabet yeteneğinin olması, B. radians’ı buğday yetiştiriciliği yapılan alanlarda sorun haline getirmiştir. Herbisitlere dayanıklılığın, popülasyon dinamiğinin bilinme gerekliliği ve demografik verilere duyulan ihtiyaçtan dolayı bitkilerdeki varyasyon çalışmaları önem arz etmektedir. Asetolaktat sentez inhibitörü herbisitlere dayanıklı 29 ve duyarlı 22 olmak üzere 51 lokasyondan toplanan B. radians popülasyonları morfolojik ve biyolojik farklılıklarına göre karşılaştırılmıştır. Sonuçlara göre parametre verileri dayanıklı ve hassas popülasyonlar arasında belirgin farklılığı göstermiş ve bu çeşitlilik benzer lokasyonlar için de geçerli olmuştur. B. radians genotipleri arasındaki morfolojik ve biyolojik çeşitlilik; coğrafi lokasyonlar, farklı aktif maddeli ve farklı etki tarzlarına sahip herbisit uygulamaları, yetiştirilen ürünler ve uygulanan farklı tarımsal uygulamalar nedeniyle meydana gelebilmektedir. Yabancı ot popülasyonları arasındaki farklılık biyolojik ve kimyasal mücadele çalışmalarını etkileyebilmektedir.

In this study, molecular markers were used to determine fungal flora in black olive fruits from field surveys to the table, following the fermentation process. Field samples were collected from different locations of Canakkale province, including Gokceada (Imbros), where organic farming is employed. Some of the fruits from field samples were used for black table olive production and then fungal flora was tracked during the fermentation process. Fungal isolation was also conducted on some commercial samples. Fifty seven isolates from field samples, 56 isolates from the fermentation process and 17 isolates from commercial products were obtained. Among these isolates, 41 Alternaria, 43 Penicillium, 19 Aspergillus, 8 Monascus and 19 other genera were determined using amplified sizes of the Beta-tubulin gene region. Species level identification was carried out based on sequences of Beta-tubulin amplicons, which provided accurate identification, especially where the genera were morphologically highly similar. The occurrence and prevalence of fungal species changed in fungal collections from the field to the fermentation process. While Alternaria alternata was common in field samples, they were absent during fermentation. Many of these identified species, such as Penicillium expansum, Aspergillus niger and Monascus pilosus, which are known as potential toxin producers such as aflatoxin, ochratoxin A and citrinin, were found both in natural and fermented samples, even at the end of the fermentation process. These results showed that some fungal species which survive on olives from the field to the table are potential toxin producers and can be successfully characterized by amplification and sequencing of Beta-tubulin gene.

The shrublands are very common in Urla-Çeşme-Karaburun peninsula located in the western point of Turkey. Prickly shrubby burnet (Sarcopoterium spinosum L.) is one of the common weed which has intensive thorns making its consumption for the local domestic animals. However, Sarcopoterium spinosum is a valuable and common medicinal plant in the Mediterranean region. Crude extract of S. spinosum leaves exhibited higher antioxidant activity, as 3143.5± 238.5 µM TEAC (Trolox Equivalent Antioxidant Capacity)/g dry weight (DW), when compared to other medicinal plants found in the literature. The aim of this study was to determine the effect of extraction parameters on the content and biological activity of the extract by response surface methodology (RSM) as well as to identify its major compounds. High Performance Liquid Chromatography (HPLC) was employed to investigate the phenolic content of S. spinosum extract. The composition of the phenolic contents including hyperoside and isoquercetin, the latter being the major component, in S. spinosum extract has been shown for the first time by HPLC. Antimicrobial activity of S. spinosum extract, identified by minimum inhibition concentration (MIC) assay, indicated that the crude extract had antifungal activity against Candida albicans.

In this study, Bomolochus unicirrus Brian, 1902, a species of parasitic copepod belonging to the family Bomolochidae (Claus, 1875), was reported for the first time from the north-eastern Mediterranean waters off the Turkish coast. Parasites were collected from the gill filaments of the European barracuda, Sphyraena sphyraena(L.)captured by trawling in Iskenderun Bay, Turkey. The morphological features of B. unicirrus were Redescribed and illustrated based on the newly collected material. Key diagnostic characters and newly observed details in some structures are highlighted and supported by using scanning electron microscopy (SEM). Differences and simply overlooked details in previous descriptions of B. unicirrus, are discussed in detail. In addition, morphological comparisons between presently reported species and the other species of the genus Bomolochus Nordmann, 1832 were also presented.

This study analyzes the technical efficiency and production risk of 862 maize farmers in major maize producing regions of Ethiopia. It employs the stochastic frontier approach (SFA) to estimate the level of technical efficiencies of stallholder farmers. The stochastic frontier approach (SFA) uses flexible risk properties to account for production risk. Thus, maize production variability is assessed from two perspectives, the production risk and the technical efficiency. The study also attempts to determine the socio-economic and farm characteristics that influence technical efficiency of maize production in the study area. The findings of the study showed the existence of both production risk and technical inefficiency in maize production process. Input variables (amounts per hectare) such as fertilizer and labor positively influence maize output. The findings also show that farms in the study area exhibit decreasing returns to scale. Fertilizer and ox plough days reduce output risk while labor and improved seed increase output risk. The mean technical efficiency for maize farms is 48 percent. This study concludes that production risk and technical inefficiency prevents the maize farmers from realizing their frontier output. The best factors that improve the efficiency of the maize farmers in the study area include: frequency of extension contact, access to credit and use of intercropping. It was also realized that altitude and terracing in maize farms had influence on farmer efficiency.

In this study, the effect of agribor fertilizer (18% pure B) on yield features of sugar beet were investigated. The study was conducted on ustifluvent subgroup soils according to soil taxonomy of agricultural faculty of Gaziosmanpaşa university. Randomized block experiment design with three replications were used and three treatments of agribor fertilizer 0.18 kg da-1 B (1 kg da -1 agribor); 0.27 kg da-1 B (1.5 kg da -1 agribor); 0.36 kg da-1 B (2 kg da -1 agribor) and control (no fertilizer) were applied. The effects of applied doses on yield properties were studied. From yield properties for sugar beet tuber weight, green leaf weight, and proportion of polar sugar in tuber were investigated. Results showed that green leaf and proportion of polar sugar in tuber not statistically important but the first application (0.18 kg da-1 agribor fertilizer) gave an statistically important yield increase in sugar beet. Boron contents of soils and boron uptake of plant species should be considered at boron application.

Fotoperiyodizm, mevsimlik çiçeklerde çiçeklenme zamanını kontrol etmek için kullanılabilecek bir özelliktir. Kadife, mutlak veya fakültatif kısa gün ve nötr gün çeşitleri içeren bir yazlık mevsimlik çiçek türüdür. Aşırı sıcak ve uzun günlerin yaşandığı yaz aylarında nötr gün çeşitlerinde bile çiçeklenmede gecikmeler yaşanmaktadır. Bu çalışmada iki farklı nötr gün kadife çeşidinde (Discovery Orange ve Discovery Yellow) fotoperyodik koşulların (kısa gün ve uzun gün) çiçeklenme ve bitki gelişimi özellikleri üzerine etkileri araştırılmıştır. Uzun gün koşulu (14 saat) olarak doğal gün uzunluğundan yararlanılmıştır. Kısa gün koşulu (8 saat) ise karartma yapılarak yapay olarak oluşturulmuştur. Bitkilerde ilk çiçek tomurcuğu oluşma süresi, ilk çiçek açma süresi, bitki taç yüksekliği, bitki taç genişliği, yan dal sayısı, çiçek sayısı, ana çiçek sapı uzunluğu, çiçek sapı kalınlığı, kök boğazı kalınlığı, gövde kalınlığı ve bitkisel kuru ağırlıklar (kök, yeşil aksam ve tüm bitki) incelenmiştir. Araştırma sonucunda kısa gün koşulunun, ilk tomurcuk oluşma ve ilk çiçek açma sürelerini azalttığı belirlenmiştir. Yapay olarak yaratılan kısa gün koşulu, uzun gün koşuluna göre çiçeklenme süresinde ‘Discovery Orange’ çeşidinde 13 gün, ‘Discovery Yellow’ çeşidinde ise 5 günlük bir erkencilik sağlamıştır.

The aim of the study was to determine the prevalence of Nosema disease caused by Nosema ceranae and Nosema apis in bee colonies in Kırşehir. A hundred worker honey bee samples were collected from each of 51 beekeepers in 31 locations in 5 provinces of Kırşehir (Centrium, Mucur, Akpınar, Boztepe and Kaman) in July 2014. A total 5100 samples were used in this study. The microscopic examinations of the study suggested that there was existence of Nosema spores in Centrium, Mucur, Akpınar and Boztepe with 25%, 23.07%, 12.5% and 60%, respectively; whereas no spores were detected in Kaman province. It was found a positive correlation between humidity and numbers of nosema spores. Molecular analyses showed that N. ceranae is only Nosema type in studied all positive samples.

New plantain hybrids plants have been developed but not much has been done on the post-harvest keeping quality of the fruits and how they are affected by microbial colonization. Hence fruits from a tetraploid hybrid PITA 2 (TMPx 548-9) obtained by crossing plantain varieties Obino l’Ewai and Calcutta 4 (AA) and two local triploid (AAB) plantain landraces Agbagba and Obino l’Ewai were subjected to various concentrations of acetic, sorbic and propionic acid to determine the impact of chemical concentration, chemical type and plantain variety on ripening and weight loss of plantain fruits. Analysis of titratable acidity, moisture content and total soluble solids showed that there were no significant differences between fruits of hybrid and local varieties. The longest time to ripening from harvest (24 days) was achieved with fruits of Agbagba treated with 3% propionic acid. However, fruits of PITA 2 hybrid treated with propionic and sorbic acid at 3% showed the longest green life which indicated that the chemicals may work better at higher concentrations. The Obino l’Ewai cultivar had the highest weight loss for all chemical types used. Modelling data obtained showed that plantain variety had the most significant effect on ripening and indicates that ripening of the fruits may depend on the plantain variety. It appears that weight loss of fruits from the plantain hybrid and local cultivars was not affected by the plantain variety, chemical type. The chemicals at higher concentrations may have an effect on ripening of the fruits and will need further investigation.