Karadeniz Tarimsal Arastirma Enstitusu

Samsun, Turkey

Karadeniz Tarimsal Arastirma Enstitusu

Samsun, Turkey
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Surucu A.,Bingöl University | Ozyazici M.A.,Siirt State University | Ozyazici G.,Karadeniz Tarimsal Arastirma Enstitusu | Uygur V.,Suleyman Demirel University of Turkey
Tarim Bilimleri Dergisi | Year: 2013

Since the performance of the chemical extraction methods are largely dependent on the soil characteristics many methods have been developped towards determining the availability index of plant nutritions in soils. Thus, this research was conducted to select the most suitable chemical extraction method and/or methods for available Fe, Cu, Zn, and Mn concentrations in acid soils of Rize and Artvin regions. In the research, total of 220 both soil and plant samples were collected by considering the tea production potentials of orchards at second harvesting period. 197 samples for Fe, 207 samples for Cu, 214 samples for Zn, and 196 samples for Mn were used to test methods' efficiency in estimating nutritional status of both soils and plants. Plant available soil Fe, Cu, Zn, and Mn concentrations were determined by using 14 different chemical and 2 biological methods. The linear correlation coefficients between available Fe, Cu, Zn, and Mn concentrations determined through the chemical methods and the biological indexes indicated that the best extraction methods for cationic microelements in acid soils are: "0.05 N HCl + 0.025 N H2SO4" for Fe, "0.005 M DTPA+0.01M CaCl2+0.1 M TEA (pH=7.3)" for Cu and Zn, and "0.01 M CaCl2" for Mn. © Ankara Üniversitesi Ziraat Fakültesi.

Ak K.,Karadeniz Tarimsal Arastirma Enstitusu | Guclu S.,Atatürk University | Tuncer C.,Ondokuz Mayis University
Turkiye Entomoloji Dergisi | Year: 2010

Middle and East Black Sea regions are the primary kiwi production areas in Turkey. Depending on observations in these regions, bark beetles (Coleoptera: Scolytidae) are detrimental on kiwi trees that are close to forests and hazelnut orchards. Although these pests usually cause damage on kiwi trunk and shoots, it was observed that Lymantor coryli (Perris, 1853) (Coleoptera: Scolytidae) cause fruit damage and dropping in kiwi orchards in Findikli town (Rize province) in 2008. It is first time reported by this paper that L. coryli cause damage on kiwi fruits. In this paper, description, distribution, short life cycle and damage of L.coryli on kiwi fruits were given in addition to recommended control methods in kiwi orchards.

Pumpkins are one of the most important Cucurbit crops in Turkey. In this research, 17 populations of pumpkin (Cucurbita moschata Duch.) were collected and identified from different provinces of the Black Sea region in 2006 and 2007 and phenotypic diversity in their fruit characters was assessed. The collection showed appreciable phenotypic variation in fruit shape, fruit colour, fruit brightness, fruit dimensions, fruit number and fruit weight. Cluster and principal component analysis (PCA) were performed to determine relationships among populations and to obtain information on the usefulness of those fruit characters for the definition of groups. Cluster analysis based on 13 quantitative and 5 qualitative variables identified 7 different groups. The first six principal component axes accounted for 85.38% of the total multivariate variation among the populations. The dendrogram was prepared to evaluate morphological similarity between the pumpkin genotypes. It revealed high variation. This evaluation of fruit trait variability can assist geneticists and breeders to identify populations with desirable characteristics for inclusion in variety breeding programs. © Ankara Üniversitesi Ziraat Fakültesi.

Calis O.,Gaziosmanpaşa University | Saygi S.,Karadeniz Tarimsal Arastirma Enstitusu | Celik D.,Karadeniz Tarimsal Arastirma Enstitusu
Bulgarian Journal of Agricultural Science | Year: 2012

Severe bacterial symptoms were observed in tomato growing areas of Tokat province, Turkey. The tomato plants have asymmetric wilting appearing on leaves with brown discolorations of vascular systems. A total of 45 bacterial isolates were collected from all tomato grown areas of Tokat province. A potassium hydroxide (KOH) string test was applied to all the bacterial samples: 9 of the 45 bacterial colonies were gram positive and 36 colonies were gram negative. The gram positive bacterial colonies were analyzed with Clavibacter michiganensis subsp. michiganensis specific primers Cmm5 and Cmm6 in PCR assays of which 3 produced 614 bp amplification products and were identified as C. michiganensis subsp. michiganensis. The 36 bacterial gram negative colonies were analyzed with Ralstonia ssp. specific primers RsolfliC forward and RsolfliC reverse of which 4 colonies amplified 400 bp fragments and were identified as Ralstonia ssp. Pathogenicity tests with 7 tomato cultivars and 10 wild tomato accessions revealed that all the 7 tomato cultivars were susceptible to virulent Cmm2 isolate. However, 2 wild tomato accessions (LA1054, LA1318) were resistant, 6 accessions were susceptible and 2 accessions were enhanced susceptible to the Cmm2 isolate. The results of this study demonstrated express and reliable detection methods of bacterial canker disease in tomatoes and possible resistance sources to bacterial canker disease from wild tomato accessions.

Ak K.,Karadeniz Tarimsal Arastirma Enstitusu | Guclu S.,Bozok University | Eken C.,Suleyman Demirel University of Turkey | Sekban R.,Ataturk Cay ve Bahce Kulturleri Arastirma Enstitusu
Turkiye Entomoloji Dergisi | Year: 2015

This study was carried out to determine distribution, host plant and biology of Ricania simulans (Walker) (Hemiptera: Ricaniidae) in Eastern Black Sea Region of Turkey between 2009 and 2011. There is no important plant pest in the Eastern Black Sea Region of Turkey except this species. However, population of R. simulans being harmful in many wild and cultivated plant species in both nymphal and adult stages has been increased since 2009. As a result of this study, it was determined that R. simulans has been widespread on coastal areas of Eastern Black Sea Region of Turkey with an extensive host range including elderberry, bean, kiwifruit, wild blackberries, hydrangea, fig tree, alder, cherry laurel, tea tree and grapevine. Nymphs of the pest emerge in the middle of May and it has 5 nymphal stages, the adults emerge early July and started to lay their eggs in early August, overwinter as eggs and gives one generation in a year. © 2015, Entomological Society of Turkey. All rights reserved.

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