hakansabunis/tr-academic-research-agent-index huggingface dataset:
Salisilik Asit ve Beta Amino Butirik Asit İle Biberde Kök-Kökboğazı Çürüklüğü (Phytophthora capsici Leonian) Kontrolü ve Hastalığa Dayanıklılık Mekanizması
Phytophthora Blight (Phytophthora capsici Leonian) Control in Pepper by Salicylic Acid and Beta Amino Butyric Acid and Disease Resistance Mechanism
Yazar: Özgönen, Hülya; Erkılıç, Ali
Dergi: The Journal of Turkish Phytopathology, Vol. 36 No. 1-2-3, 2014
Anahtar kelimeler: Beta Amino Butyric Acid (BABA), capsidiol, induced resistance · pepper salicylic acid (SA)

In this study, the effects of Salicylic Acid (SA) and DL-β-amino-n-butyric Acid (BABA) on Phytophthora blight caused by Phytophthora capsici were investigated. SA completely inhibited the mycelial growth of P. capsici at 250ppm concentration in vitro. In the pot experiments, the applications of soil and leaves of SA reduced the disease severity of P. capsici with 75.1-92.2% and 87.2-95.0%, respectively. In the both greenhouse and field conditions, the effects of SA on the disease severity of P. capsici were 68.9 and 62.0% at 1g/m2 dose of soil drench, 61.6% at 500ppm and 50.2% at 1000ppm of leaves sprays, respectively. BABA had no effect on mycelial growth of P. capsici up to 1000ppm concentrations in vitro. However, in the pot experiments, the applications of soil and leaves of BABA reduced the disease severity of P. capsici with 60.1-84.3% and 83.6-97.2%, respectively. In the both greenhouse and field conditions, the effects of BABA on the disease severity of P. capsici were 70.5 and 49.0% at 1g/m2dose of soil drench, 63.4% at 500ppm and 46.4% at 2000ppm of leaves sprays, respectively. The applications of leaves with 1000ppm of SA and 2000ppm of BABA increased the capsidiol level in pepper plants

In this study, the effects of Salicylic Acid (SA) and DL-β-amino-n-butyric Acid (BABA) on Phytophthora blight caused by Phytophthora capsici were investigated. SA completely inhibited the mycelial growth of P. capsici at 250ppm concentration in vitro. In the pot experiments, the applications of soil and leaves of SA reduced the disease severity of P. capsici with 75.1-92.2% and 87.2-95.0%, respectively. In the both greenhouse and field conditions, the effects of SA on the disease severity of P. capsici were 68.9 and 62.0% at 1g/m2 dose of soil drench, 61.6% at 500ppm and 50.2% at 1000ppm of leaves sprays, respectively. BABA had no effect on mycelial growth of P. capsici up to 1000ppm concentrations in vitro. However, in the pot experiments, the applications of soil and leaves of BABA reduced the disease severity of P. capsici with 60.1-84.3% and 83.6-97.2%, respectively. In the both greenhouse and field conditions, the effects of BABA on the disease severity of P. capsici were 70.5 and 49.0% at 1g/m2dose of soil drench, 63.4% at 500ppm and 46.4% at 2000ppm of leaves sprays, respectively. The applications of leaves with 1000ppm of SA and 2000ppm of BABA increased the capsidiol level in pepper plants
Yüksek Tünel Koşullarında Patlıcanda Fusarium Solgunluk Hastalığına Karşı Sistemik Dayanıklılığın Teşviki
Induction of Systemic Resistance in Eggplant Against Fusarium Wilt Disease in Polytunnel Conditions
Yazar: Altınok, H. Handan
Dergi: The Journal of Turkish Phytopathology, Vol. 36 No. 1-2-3, 2014
Anahtar kelimeler: Fusarium oxysporum, Solanum melongena, acibenzolar-S-methyl, induced resistance, polytunnel

In this study, a plant activator (Actigard 50 WG; Acibenzolar-S-methyl; ASM) and an isolate of Fusarium oxysporum formae speciales nonpathogenic on eggplant (F. oxysporum f. sp. melonis; FOM) which were found successful against Fusarium wilt disease (Fusarium oxysporum f. sp. melongenae; Fomg) in previous pot experiments, were examined in polytunnel conditions. Pathogen (Fomg10) was applied 72 h after ASM and FOM treatments to allow resistance development. Average lengths of ASM and FOM-treated plants were 88.8 and 78.7 cm, respectively, while control plant lengths were 53.56 cm, at 67th day after inoculation (DAI). Fomg10 was isolated from 25th cm of ASM and FOM induced plants and from 50th cm of control plants to evaluate disease progress. The disease improved rapidly in control plants by the end of experiment (67 DAI), and disease severity was 81%. Although neither of inducers succeeded to inhibit initial penetration of the pathogen, however, induced a certain amount of resistance by reducing the disease severity in eggplants by 37.65% (ASM) and 50.61% (FOM) at 67th DAI, compared to control

In this study, a plant activator (Actigard 50 WG; Acibenzolar-S-methyl; ASM) and an isolate of Fusarium oxysporum formae speciales nonpathogenic on eggplant (F. oxysporum f. sp. melonis; FOM) which were found successful against Fusarium wilt disease (Fusarium oxysporum f. sp. melongenae; Fomg) in previous pot experiments, were examined in polytunnel conditions. Pathogen (Fomg10) was applied 72 h after ASM and FOM treatments to allow resistance development. Average lengths of ASM and FOM-treated plants were 88.8 and 78.7 cm, respectively, while control plant lengths were 53.56 cm, at 67th day after inoculation (DAI). Fomg10 was isolated from 25th cm of ASM and FOM induced plants and from 50th cm of control plants to evaluate disease progress. The disease improved rapidly in control plants by the end of experiment (67 DAI), and disease severity was 81%. Although neither of inducers succeeded to inhibit initial penetration of the pathogen, however, induced a certain amount of resistance by reducing the disease severity in eggplants by 37.65% (ASM) and 50.61% (FOM) at 67th DAI, compared to control
Çeltik Sap Çürüklüğü Hastalığının Samsun'daki Yaygınlığı, Şiddeti ve Bazı Çeltik Çeşitlerinin Hastalığa Karşı Duyarlılıklarının Belirlenmesi
Determination of the Incidence and Severity of Stem Rot Disease of Rice in Samsun, Turkey and Evaluation of Some Rice Cultivars for Resistance
Yazar: Erper, İsmail; Karaca, Gürsel; Deligöz, İlyas
Dergi: The Journal of Turkish Phytopathology, Vol. 36 No. 1-2-3, 2014
Anahtar kelimeler: Oryza sativa, resistant variety, Sclerotium oryzae, Turkey

Stem rot disease of rice has previously reported from Turkey many years ago. Since it did not cause severe damage on rice crop, was forgotten for years. Recently, rice growers in Samsun province (Turkey), complained about stem rot disease and Sclerotium oryzae was isolated from the diseased plants. In the present study, incidence and severity of the disease in the province and reactions of some rice cultivars against the disease were investigated. As a result of surveys, the disease was found to be common in all rice growing areas of Samsun with 75.1% mean incidence rate and 36.5% severity rate. Pathogenicity trial showed that ‘Ribe’ cultivar and ‛Ergene’ cultivars were highly resistant to the disease, while 5 other cultivars were moderately resistant or moderately susceptible. It was determined that stem rot disease with severity rate less than 30% did not significantly affect the heights and fresh weights of rice plants

Stem rot disease of rice has previously reported from Turkey many years ago. Since it did not cause severe damage on rice crop, was forgotten for years. Recently, rice growers in Samsun province (Turkey), complained about stem rot disease and Sclerotium oryzae was isolated from the diseased plants. In the present study, incidence and severity of the disease in the province and reactions of some rice cultivars against the disease were investigated. As a result of surveys, the disease was found to be common in all rice growing areas of Samsun with 75.1% mean incidence rate and 36.5% severity rate. Pathogenicity trial showed that ‘Ribe’ cultivar and ‛Ergene’ cultivars were highly resistant to the disease, while 5 other cultivars were moderately resistant or moderately susceptible. It was determined that stem rot disease with severity rate less than 30% did not significantly affect the heights and fresh weights of rice plants
Toprak Kökenli Şeker Pancarı Virüsleri ve Vektör Polymyxa Betae Keskin'in Şeker Pancarında Simptom Oluşumu ve Kök Ağırlığı Üzerine Etkileri
The effects of Soilborne Sugar Beet Viruses and Their Vector Polymyxa betae Keskin on Symptom Expression and Root Weight of Sugar Beet
Yazar: Yılmaz, Nazlı Dide Kutluk; Sökmen, Miray Arli
Dergi: The Journal of Turkish Phytopathology, Vol. 36 No. 1-2-3, 2014
Anahtar kelimeler: Bait plant, BNYVV, BSBV, sugar beet

Sugar beet bait plants grown in soil samples collected in central and northern parts of Turkey were previously found to be infected with Beet necrotic yellow vein virus (BNYVV) and Beet soilborne virus (BSBV) through enzyme-linked immunosorbent assay (ELISA), and with Polymyxa betae using direct coloration method of bait plant root tissues. The effects of BNYVV, BSBV and P. betae, alone and in combination on the growth of sugar beet seedlings were investigated by considering root weight and the mean ELISA values. The result from the statistical analysis showed that total fresh root weight was negatively correlated with BNYVV, BSBV and BNYVV+BSBV infections, but not with aviruliferous P. betae infection. Additionally, the most common symptom after six weeks growing periods was chlorosis for single BNYVV (46%), BSBV (28.1%) and double BNYVV and BSBV (58.5%) infections. Also, the number of plants with no visible symptoms in single BSBV infections (60.3%) was higher than that obtained in single BNYVV infections (39.5%). Most of plants (65.3%) infected with aviruliferous P. betae populations had no visible symptom, however, 24.7% of the plants showed chlorosis. This study indicated that various populations of both sugar beet viruses and P. betae could be present in the region, and BNYVV seems to provoke chlorosis in both single and double infections

Sugar beet bait plants grown in soil samples collected in central and northern parts of Turkey were previously found to be infected with Beet necrotic yellow vein virus (BNYVV) and Beet soilborne virus (BSBV) through enzyme-linked immunosorbent assay (ELISA), and with Polymyxa betae using direct coloration method of bait plant root tissues. The effects of BNYVV, BSBV and P. betae, alone and in combination on the growth of sugar beet seedlings were investigated by considering root weight and the mean ELISA values. The result from the statistical analysis showed that total fresh root weight was negatively correlated with BNYVV, BSBV and BNYVV+BSBV infections, but not with aviruliferous P. betae infection. Additionally, the most common symptom after six weeks growing periods was chlorosis for single BNYVV (46%), BSBV (28.1%) and double BNYVV and BSBV (58.5%) infections. Also, the number of plants with no visible symptoms in single BSBV infections (60.3%) was higher than that obtained in single BNYVV infections (39.5%). Most of plants (65.3%) infected with aviruliferous P. betae populations had no visible symptom, however, 24.7% of the plants showed chlorosis. This study indicated that various populations of both sugar beet viruses and P. betae could be present in the region, and BNYVV seems to provoke chlorosis in both single and double infections
Bazı Mısır Çeşitlerinin Mısır Rastığı Hastalığı ( Ustilago Maydis (DC) Corda)'na Karşı Duyarlılıklarının Belirlenmesi
Determination of Susceptibility of Some Maize Varieties Against Corn Smut Caused by Ustilago maydis (DC) Corda
Yazar: Aydoğdu, Mehmet; Boyraz, Nuh
Dergi: The Journal of Turkish Phytopathology, Vol. 35 No. 1-2-3, 2014

The present study was conducted to determine susceptibility of some maize cultivars against corn smut (Ustilago maydis (DC) Corda.) under ecological conditions of Konya, Turkey. For these aims, field trials were established during the growing season in 2005. In the trials, reactions of 10-corn-variety against corn smut were investigated and was not determined any resistant cultivar of all the varieties used in the trials. However, it was established that 35P12, Monton, Bolson and TTM-815 varieties were found as middle resistant to U. maydis, whereas, both Falkner and Monzon varieties were very susceptible to the pathogen. In addition, yield losses from U. maydis varied from 26.4 % to 51.7 % in varieties used in the trials

The present study was conducted to determine susceptibility of some maize cultivars against corn smut (Ustilago maydis (DC) Corda.) under ecological conditions of Konya, Turkey. For these aims, field trials were established during the growing season in 2005. In the trials, reactions of 10-corn-variety against corn smut were investigated and was not determined any resistant cultivar of all the varieties used in the trials. However, it was established that 35P12, Monton, Bolson and TTM-815 varieties were found as middle resistant to U. maydis, whereas, both Falkner and Monzon varieties were very susceptible to the pathogen. In addition, yield losses from U. maydis varied from 26.4 % to 51.7 % in varieties used in the trials
Fluorescent Pseudomonas'lar ile Karanfil Fusarium Solgunluğunun Biyolojik Savaşımı
The Biological Control of Fusarium Wilt on Carnation with Fluorescent Pseudomonads
Yazar: Coşkuntuna, Arzu; Yıldız, Figen
Dergi: The Journal of Turkish Phytopathology, Vol. 35 No. 1-2-3, 2014
Anahtar kelimeler: Biological control, Fusarium oxysporum f. sp. dianthi, carnation, fluorescent pseudomonads, Fusarium wilt

Fusarium oxysporum f.sp. dianthi (Fod) causes severe wilting on carnations in Turkey. In order to control of carnation vascular wilt disease, 311 fluorescent Pseudomonads were isolated from the roots of carnation plants and the bacterial strains were tested for in vitro antagonism with Fod in plate tests. Fifty nine strains were evaluated and five strains found to suppress Fusarium wilt of carnation in pot bioassays. Antagonistic bacterial strains S53 and S54 were identified as Pseudomonas putida; I20, U34 and U73 as Pseudomonas fluorescens

Fusarium oxysporum f.sp. dianthi (Fod) causes severe wilting on carnations in Turkey. In order to control of carnation vascular wilt disease, 311 fluorescent Pseudomonads were isolated from the roots of carnation plants and the bacterial strains were tested for in vitro antagonism with Fod in plate tests. Fifty nine strains were evaluated and five strains found to suppress Fusarium wilt of carnation in pot bioassays. Antagonistic bacterial strains S53 and S54 were identified as Pseudomonas putida; I20, U34 and U73 as Pseudomonas fluorescens
FARKLI TANELER ÜZERİNDE ASPERGILLUS NIGER VAN TIEGHEM’IN SKLEROT OLUŞUMU
Sclerotium Production of Aspergillus niger Van Tieghem on Different Grains
Yazar: Sağır, Abuzer; Yıldız, Abdunnasır; Sağır, Pınar
Dergi: The Journal of Turkish Phytopathology, Vol. 34 No. 1-2-3, 2014
Anahtar kelimeler: Aspergillus niger, sklerot oluşumu, arpa, buğday ve darı taneleri

Bu çalışmada, Aspergillus niger’ın üç farklı tahıl tanesi üzerinde fungal gelişimi ve sklerot oluşumu incelenmiştir. En iyi fungal gelişme arpa (73.60 mm), buğday (71.46 mm) ve PDA (71.46 mm)’da, en zayıf gelişme ise akdarı (53.60) üzerinde saptanmıştır. En fazla sklerot oluşumu ve ağırlığı arpa ve akdarı danelerinde, en az ise buğday’da belirlenmiştir. Ayrıca, en büyük sklerot arpa daneleri üzerinde oluşmuştur. A. niger fungusunun değişik yapı ve renkte sklerotlar oluşturduğu belirlenmiştir. Sklerotların ekseriyeti yuvarlak küre şeklinde açık kahve yada koyu kahve ve pembe renklidirler.

Bu çalışmada, Aspergillus niger’ın üç farklı tahıl tanesi üzerinde fungal gelişimi ve sklerot oluşumu incelenmiştir. En iyi fungal gelişme arpa (73.60 mm), buğday (71.46 mm) ve PDA (71.46 mm)’da, en zayıf gelişme ise akdarı (53.60) üzerinde saptanmıştır. En fazla sklerot oluşumu ve ağırlığı arpa ve akdarı danelerinde, en az ise buğday’da belirlenmiştir. Ayrıca, en büyük sklerot arpa daneleri üzerinde oluşmuştur. A. niger fungusunun değişik yapı ve renkte sklerotlar oluşturduğu belirlenmiştir. Sklerotların ekseriyeti yuvarlak küre şeklinde açık kahve yada koyu kahve ve pembe renklidirler.
Türkiye'de Ranunculus Spp. Üzerinde Domates Lekeli Solgunluk Virüsü (Tswv) İnfeksiyonu
Tomato Spotted Wilt Virus (TSWV) Infection on Ranunculus spp. in Turkey
Yazar: Kamberoğlu, Muharrem A.; Atakan, Ekrem; Uygur, Sibel; Çalışkan, A. Filiz; Küçük, Bilge
Dergi: The Journal of Turkish Phytopathology, Vol. 34 No. 1-2-3, 2014
Anahtar kelimeler: Domates Lekeli Solgunluk Virüsü, TSWV, Ranunculus spp

TÜRKİYE’DE RANUNCULUS SPP. ÜZERİNDE DOMATES LEKELİ SOLGUNLUK VİRÜSÜ (TSWV) İNFEKSİYONU Bunyaviridae familyasına dahil Tospovirüs cinsinin bir üyesi olan domates lekeli solgunluk virüsü (tomato spotted wilt virus, TSWV), dünyada en yaygın bitki virüslerinden bir tanesidir ve birçok süs bitkisi ile sebzelerde ekonomik anlamda önemli hastalıklara neden olmaktadır (Reddy ve Wightman, 1988). TSWV thripsler tarafından persistent propagative olarak taşınmaktadır (Whitfield ve ark., 2004). Tek yıllık süs bitkileri ve yabancı otların dahil olduğu geniş konukçu dizisi, bu virüsün bir mevsimden diğerine canlılığını sürdürmesine yardımcı olmaktadır (Goldenberg, 2004) testlerde pozitif ve negatif kontroller ile tampon kontrolün yer aldığı 96 kuyucuklu

TÜRKİYE’DE RANUNCULUS SPP. ÜZERİNDE DOMATES LEKELİ SOLGUNLUK VİRÜSÜ (TSWV) İNFEKSİYONU Bunyaviridae familyasına dahil Tospovirüs cinsinin bir üyesi olan domates lekeli solgunluk virüsü (tomato spotted wilt virus, TSWV), dünyada en yaygın bitki virüslerinden bir tanesidir ve birçok süs bitkisi ile sebzelerde ekonomik anlamda önemli hastalıklara neden olmaktadır (Reddy ve Wightman, 1988). TSWV thripsler tarafından persistent propagative olarak taşınmaktadır (Whitfield ve ark., 2004). Tek yıllık süs bitkileri ve yabancı otların dahil olduğu geniş konukçu dizisi, bu virüsün bir mevsimden diğerine canlılığını sürdürmesine yardımcı olmaktadır (Goldenberg, 2004) testlerde pozitif ve negatif kontroller ile tampon kontrolün yer aldığı 96 kuyucuklu
Bazı Trichoderma İzolatlarının Kavunda Kömür Çürüklüğü Hastalığına ve Bitki Gelişimine Etkisi
Effects of Some Trichoderma Isolates Against Charcoal Rot Disease of Melon and Plant Growth
Yazar: Bayrak, Uğur; Korkom, Yunus; Yıldız, Ayhan
Dergi: The Journal of Turkish Phytopathology, Vol. 50 No. 1, 2021
Anahtar kelimeler: biocontrol,Cucumis melo,Macrophomina phaseolina,seed germination ; biyokontrol,Cucumis melo,Macrophomina phaseolina,tohum çimlenmesi

Bu çalışma Trichoderma izolatlarının kavunda (Cucumis melo cv. Kırkağaç-637) kömür çürüklüğü hastalığına karşı biyolojik mücadele olanaklarının değerlendirilmesi amacıyla yürütülmüştür. Macrophomina phaseolina (Tassi) Goid. kavun üretiminde önemli kayıplara neden olan toprak kaynaklı fungal patojendir. Çalışmada etkinliği önceden bilinen altı Trichoderma izolatının kavunda tohum çimlenesi, bitki gelişimi ve M. phaseolina’ya karşı etkinliği in-vitro ve in-vivo’da belirlenmiştir. In-vitro kavun tohum çimlenme testi sonucunda Trichoderma izolatlarında %80−100 tohum çimlenmesi gerçekleşirken, kontrolde ise %70 oranında olmuştur. In-vivo çalışmasında; uygulamaların bitki gelişimine olan etkisi ele alındığında, Tr28 izolatı negatif kontrole göre %77.68 bitki yaş ağırlık artışı sağlayan ve %177 oranında kök gelişimini teşvik eden en iyi izolat olmuştur. M. phaseolina ile inokule edilen bitkilerde Tr28+Mp15, Tr138B+Mp15 ve R+Mp15 uygulamaları yaş ağırlık artışında, kök ağırlık artışında ise Tr28+Mp15 ve R+Mp15, Tr138B+Mp15 ve Tr55+Mp15 uygulamaları pozitif kontrole göre en iyi etkiyi göstermiştir. 12.5 g/l Fludioxonil + 5 g/l Metalaxyl (Cebir) uygulaması ise Tr28+Mp15, Tr138B+Mp15 göre bitki gelişimi ve M. phaseolina’ya karşı etkisi daha düşük olmuştur.

This study was aimed to evaluate the biological control effectiveness of Trichoderma isolates against charcoal rot disease in melon (Cucumis melo cv. Kırkağaç-637). Macrophomina phaseolina (Tassi) Goid. is soilborne fungal pathogen that causes for considerable damages in melon production. In the study, the effectiveness of six previously known Trichoderma isolates on seed germination, plant growth and against M. phaseolina of melon in in-vitro and in-vivo was determined. As a result of the seed germination of melon tests carried out in-vitro condition, the seed germination occurred 80−100% on Trichoderma isolates, while 70% on control plates. In in-vivo study, when growth of plant was compared in treatments, the isolate of Tr28 was encouraged the fresh weight increase (77.68%) and root growth (177%) in comparison with the negative control. When Tr28+Mp15, Tr138B+Mp15 and R+Mp15 treatments increased the fresh weight, Tr28+Mp15, R+Mp15, Tr138B+Mp15, Tr55+Mp15 isolates increased the root weight in plants inoculated with M. phaseolina, and these applications showed the best effect compared to the positive control. The plant growth and effectiveness on M. phaseolina in 12.5 g/l Fludioxonil + 5 g/l Metalaxyl (Cebir) treatment, it was lower than Tr28+Mp15, Tr138B+Mp15 treatments.
Mildiyö Hastalığına Karşı Farklı Tolerans Derecelerindeki Bazı Ayçiçeği Genotiplerinde Tohum Kökenli Fungusların Belirlenmesi
Determination of Seed-borne Fungi in Some Sunflower Genotypes Showing Different Tolerance Degree Against Downy Mildew Disease
Yazar: Arap, Mustafa; Özer, Nuray; Bayraktar, Harun
Dergi: The Journal of Turkish Phytopathology, Vol. 51 No. 1, 2021
Anahtar kelimeler: Sunflower (Helianthus annuus L.),sunflower genotypes,seed-borne fungi,pathogenicity ; Ayçiçeği (Helianthus annuus L.),ayçiçeği genotipleri,tohum kökenli funguslar,patojenisite

Bu çalışmada ayçiçeği mildiyösü hastalığına karşı hassas ve yüksek derecede tolerant olan genotiplerin perikarp ve tohumlarında bulunan fungus türlerinin tanılanması ve patojenisitelerinin belirlenmesi amaçlanmıştır. Çalışmada Alternaria alternata hassas genotiplerin tümünün tohum ve perikarplarında tespit edilmiştir. Alternaria infectoria, Bipolaris cynodondis, Cladosporium cladosporioides ve Fusarium oxysporum’un varlığı genotiplere, perikarp ve tohum kısımlarına göre farklılık göstermiştir. Funguslarla bulaşık en yüksek perikarp ve tohum oranı sırasıyla 2517-A (%19) ve 9728-A (%16) genotiplerinde olmuştur. Ayçiçeği mildiyösüne yüksek derecede tolerant genotiplerin perikarp ve tohumlarının yaygın olarak Fusarium culmorum ile bulaşık olduğu ayrıca az sayıda genotipte A. alternata ve A. infectoria’nın da bulunduğu belirlenmiştir. Yüksek derecede tolerant genotipler arasında 13-TR-001 ve TTAE-13-19’un sırasıyla perikarp ve tohumlarının fungal organizmalarla en yüksek oranda bulaşık olduğu belirlenmiştir. İzole edilen fungus türlerinin tohum içeren perikarba inokulasyonu şeklinde gerçekleştirilen patojenisite testlerinde A. alternata, A. infectoria, B. cynodondis, C. cladosporioides, F. culmorum ve F. oxysporum fidelerde sırasıyla %33.03, %22.7, %30.7, %26.47, %52.03 ve %38.7’ye ulaşan oranlarda hastalık şiddeti oluşturmuşlardır.

Identification of fungi species on pericarps and seeds of sunflower genotypes, which were sensitive and highly tolerant against downy mildew, and determination of their pathogenicities were aimed in this study. Alternaria alternata was determined in seeds and perikarps of all sensitive genotypes. The presence of Alternaria infectoria, Bipolaris cynodondis, Cladosporium cladosporioides and Fusarium oxysporum differed to genotypes, pericarps and seeds. The highest pericarp and seed rate contaminated with fungi was recorded on 2517-A (19%) and 9728-A (16%), respectively. It was determined that pericarp and seeds of genotypes highly tolerant to downy mildew were commonly contaminated with Fusarium culmorum, and also A. alternata and A. infectoria were found in a few genotypes. Among the highly tolerant genotypes, pericarps and seeds of 13-TR-001 and TTAE-13-19, respectively, were contaminated with fungi at the highest rate. In pathogenicity tests by inoculation of pericarps with seeds with fungi species, A. alternata, A. infectoria, B. cynodontis, C. cladosporioides, F. culmorum and F. oxysporum caused disease severity in seedlings at the rates reaching to 33.03%, 22.7%, 30.7%, 26.47%, 52.03% and 38.7%, respectively.