Durdane YANAR - Academia.edu (original) (raw)
Papers by Durdane YANAR
Ondokuz Mayıs Üniversitesi Ziraat Fakültesi Dergisi (. Anadolu Tarım Bilimleri Dergisi), Mar 1, 2005
Zile ve Almus)'nde elmalarda görülen akar türleri tespit edilmiştir. Surveyler sonucunda dört alt... more Zile ve Almus)'nde elmalarda görülen akar türleri tespit edilmiştir. Surveyler sonucunda dört alt takıma ait yirmi akar türü belirlenmiştir. Bunlardan Tetranychidae familyasından beş, Eriophyidae familyasından iki, Tarsonemidae familyasından bir ve Tenuipalpidae familyasından bir tür olmak üzere toplam dokuz zararlı akar türü belirlenmiştir. Gamasida alt takımından Phytoseiidae familyasına ait yedi, Actinedida alt takımının Stigmaeidae familyasına ait bir tür saptanmıştır. Diğer familyalardan Tydeidae familyasına ait iki, Acaridae familyasına ait ise bir tür tespit edilmiştir. Tetranychidae familyası türleri, Tetranychus urticae Koch, Tetranychus vienensis Zacher, Panonychu ulmi (Koch), Bryobia rubrioculus (Scheuten), Eotetranychus uncatus Garman olup, E. uncatus Türkiye için yeni türdür.
Pakistan Journal of Zoology, 2012
Eotetranychus uncatus Garman (Acari: Tetranychidae) was found in unsprayed and abandoned orchards... more Eotetranychus uncatus Garman (Acari: Tetranychidae) was found in unsprayed and abandoned orchards in Turkey. It has the capability to become an important pest of deciduous fruit trees. In this study life-history parameters of E. uncatus Garman was studied at 25±1°C and 16:8 L:D photoperiod and 65±5% relative humidity on the apple leaf discs under controlled conditions. While the mean generation time of female (from egg to adult stage) was 13.65 days, it was 11.82 days for male. Pre-oviposition period of female was 2.95 days and total number of eggs laid per female was 26.30.
TABAD, Tarım Bilimleri Araştırma Dergisi, 2012
Turkish Journal of Agriculture: Food Science and Technology, Dec 14, 2020
Objective of this study is to determine plant protection problems which wheat growers encountered... more Objective of this study is to determine plant protection problems which wheat growers encountered and their knowledge on plant protection in Sivas province. This study is carried out in the Central, Hafik, Ulas and Yıldızeli districts of Sivas province with 220 farmers. The problems which related to plant diseases, pests and weeds in wheat growers faced were also determined. Almost all farmers (99.09%) apply chemical control. Farmers decides the pesticide applications in their wheat growing areas according to own experience (84.09%), manufacturers recommendations (24.09%), the advice of agricultural experts (17.27%) and the advice of neighbours and friends (9.55%). Farmers mostly have been applying pesticides based on their own experiences. In recent years, pesticides are being used widely against diseases, pests and weeds. Some times over dose application of pesticides by farmers in judiciously resulted in environmental pollution, health problems. Also the natural enemies will be affected. Furthermore, in weed control farmers use herbicides against broad leaved weeds. It was determined that the farmers do not have knowledge about narrow leaved weeds and herbicides use against these weed species is limited. According to the results of this survey, it will be beneficial to provide training on plant protection to wheat producers in the region.
International Journal of Agricultural and Natural Sciences, Feb 1, 2015
DergiPark (Istanbul University), Dec 15, 2018
Bu çalışma, Antalya'nın Serik ilçesinde modern örtüaltı yetiştiriciliği yapılan sera işletmelerin... more Bu çalışma, Antalya'nın Serik ilçesinde modern örtüaltı yetiştiriciliği yapılan sera işletmelerinde yürütülmüştür. Örtü altı yetiştiriciliği yapan üreticilerin, üretim sorunları, bu sorunlara yönelik çözüm üretme sürecindeki bilgi düzeyleri ile ürünlerdeki hastalık ve zararlılarla mücadele yöntemleri incelenmiştir. Araştırma Serik ilçesi ve ilçeye bağlı 10 köyde bulunan toplam 100 örtü altı yetiştiriciliği yapan işletmelerde yüz yüze yapılan anketlerden elde edilen bilgilere dayanmaktadır. Ayrıca, çalışmada Antalya ilinde örtü altı sebze üretiminde öne çıkan domates, biber, patlıcan ve hıyar ürünlerinde sorun olan hastalık ve zararlılar ile mücadele yöntemleri hakkında bilgiler sunulmuştur. Araştırma bulgularından bazılarına göre, üreticilerin dörtte biri entegre mücadele yöntemlerinden yararlandıklarını belirtirken dörtte üçü ise kimyasal mücadele yaptıklarını ifade etmişlerdir. Diğer yandan üreticilerin, kimyasal mücadele uygulamalarındaki güvenlik önlemleri ve çevreye etkileri konusunda çoğunlukla bilinçsiz oldukları belirlenmiştir.
DergiPark (Istanbul University), Nov 20, 2005
Survey was conducted to determine Apple mosaic virüs (ApMV) and it's distribution in Tokat provin... more Survey was conducted to determine Apple mosaic virüs (ApMV) and it's distribution in Tokat province. Total of 116 plant samples were collected from twenty four orchards in Central, Pazar, Turhal and Artova districts of Tokat in 2001. ApMV was revealed by DAS-ELISA in 6.9 % of the leaf samples. The virus vas detected in 15.09 % of the apple plants at two orchards located in Fidanlık and Geyraz sites of Central district. Infected cultivar was only Granny Smith.
Gaziosmanpaşa Üniversitesi Ziraat Fakültesi Dergisi, 2008
... Journal of the Acarological Society of Japan, 11(1): 1-10 Goldsmith, J., 2004. The Tomato Rus... more ... Journal of the Acarological Society of Japan, 11(1): 1-10 Goldsmith, J., 2004. The Tomato Russet Mite: Aculops lycopersici (Massee). Entomology Circular Ministry of Aggriculture and Lands Boulles Research Station. Page 5. ...
Phytoparasitica, Oct 1, 2008
The species composition and seasonal cycle ofTetranychus urticae Koch (two-spotted spider mite) a... more The species composition and seasonal cycle ofTetranychus urticae Koch (two-spotted spider mite) andEotetranychus uncatus Garman (garman spider mite; the two species were evaluated together),Amphitetranychus viennensis (Zacher) (hawthom red spider nite),Panonychus ulni (Koch) (European red mite),Bryobia rubrioculus (Scheuten) (brown mite) (Acari Tetranychidae),Cenopalpus pulcher Can and Fanz. (flat scarlet mite) (Tenuipalpidae) and their natural enemies (Phytoseiidae and Stigmaeidae family members) were compared
African Journal of Biotechnology, Apr 11, 2011
A foliar application of soluble silicon (liquid potassium silicate) was tested for the control of... more A foliar application of soluble silicon (liquid potassium silicate) was tested for the control of powdery mildew of tomato for 2 years in the field conditions on susceptible cultivar Alida F1. Powdery mildew in field-grown staked tomato, caused by Leveillula taurica was significantly controlled by a foliar spray of either K 2 SiO 3 or Bayleton + sulfur. Potassium silicate applied on a 12 day schedule was highly protective against natural infection by the mildew fungus in the field conditions. The disease severity indexes (DSI) were 77.5 and 74.7% in control plots in 2006 and 2007, respectively, and were significantly different (P < 0.05) from those in the K 2 SiO 3 plots with 5.8 and 4.6% in 2006 and 2007, respectively. Potassium silicate concentration (1 g/1 L water) used in the present study were not phytotoxic to plant foliage. The inhibitory effectiveness of potassium silicate makes it a useful biocompatible fungicide and possibly ideal foliar fertilizer for disease control in the field.
Plant Pathology Journal, Dec 15, 2005
Journal of the Agricultural Faculty of Gaziosmanpaşa University, 2018
Applied Ecology and Environmental Research, 2019
Metaseiulus (=Galendromus or Typhlodromus) occidentalis (Nesbitt) (Acari: Phytoseiidae) is an imp... more Metaseiulus (=Galendromus or Typhlodromus) occidentalis (Nesbitt) (Acari: Phytoseiidae) is an important and effective predator of pest mites in agricultural crops and is commercially available in the United States. Azadirachtin is a biorational pesticide, which contains azadirachtin A (10 g/l) as the basic active compound. The active compound has several properties useful for insect control (repellency, feeding and oviposition deterrence) and is considered safe for the environment. With the use of natural compound like azadirachtin A in integrated pest management programs, it is important to know whether the compounds have any side effects on predatory mite such as M. occidentalis. Therefore, the current study aimed to examine the toxic effect of different doses (0.1 ml (NZ-1*2), 0.05 ml (NZ-1), 0.025 ml (NZ-2), 0.01 ml (NZ-3), 0.005 ml (NZ-4) and 0.001 (NZ-5)/ 10 ml water) of NeemAzal-T/S (a.i. 10 g/l azadirachtin A) on M. occidentalis. The mortality rate of M. occidentalis was 77.5% 24 h after application of NeemAzal-T/S at 0.1 ml/10 ml water dose. The mortality caused by the recommended dose (0.05 ml/10 ml water) of NeemAzal-T/S was 62.31%, 70% and 73.07%, 24, 48 and 72 h after application, respectively. It is concluded that NeemAzal-T/S is moderately toxic against the predatory mite M. occidentalis. Therefore, the use of NeemAzal-T/S to control the pest mites in agricultural crops might affect the populations of predatory mites.
Experimental and Applied Acarology, Oct 21, 2020
This study uses an image-processing technique to determine the damage level caused by two-spotted... more This study uses an image-processing technique to determine the damage level caused by two-spotted spider mite (Tetranychus urticae Koch) to cucumber plants and changes in the number of mites in a greenhouse. Firstly, a new agricultural platform was developed to ensure camera stability for capturing quality images. The images of 50 leaves infested with T. urticae were captured weekly for 5 weeks with the platform, which resulted in 250 images. Fifty of these captured images were randomly selected and processed with an image-processing algorithm developed using an image processing toolbox module of MATLAB. The results obtained from the image processing algorithm were compared with expert observations. The image-processing method predicted the damage with 3.91 root mean squared error (RMSE). A highly significant positive relationship was found between image processing and expert observations. The results indicate that this new image-processing method may be successfully used in place of expert observation to determine T. urticae damage in greenhouses.
South African Journal of Science and Technology, Dec 19, 2013
Methanol extracts of nine plant species were evaluated for their ovicidal activity against the tw... more Methanol extracts of nine plant species were evaluated for their ovicidal activity against the two-spotted spider mite Tetranychus urticae Koch in a bioassay under laboratory conditions. These plants and plant parts used in the study were Xanthium strumarium L. (fruits and leaves), Anthemis vulgaris L. (flowers and leaves), Humulus lupulus L. (flower buds), Chenopodium album L. (flowers and leaves), Melia azedarach L. (fruits), Eucalyptus camaldulensis Dehn (flower buds and leaves), Solanum nigrum L. (flowers, leaves and fruits), Styrax officinalis L. (seed coats, seeds) and Lolium perenne L. (flowers and leaves). The greatest mortality was caused by E. camaldulensis leaf extract (63.26%), followed by X. strumarium fruit (59.64%), X. strumarium leaf (57.45%), S. nigrum fruit (51.57%), A. vulgaris flower (46.80%) and S. officinalis seed extract (44.25%). Lolium perenne extract (flowers, leaves) caused the least mortality (24.40%). Azadirachtin at 10 g/l concentration was used as a chemical standard and caused 10.09% mortality. Our results show that some of these plant extracts have a potential for ovicidal activity on two-spotted spider mite eggs and are worth further investigation.
Agriculture and Forestry, Mar 30, 2019
The granary weevil Sitophilus granarius L. is one of the most damaging grains pest in many parts ... more The granary weevil Sitophilus granarius L. is one of the most damaging grains pest in many parts of the World and Turkey. Chemical insecticides have been widely employed for the control of stored grain pests. This has caused such problems as insecticide resistance along with contamination of foodstuffs with chemical residues. Thus, there is a growing interest in using pathogenic control agents as an alternative. This study aimed to evaluate the efficacy of entomopathogenic fungus Beauveria bassiana isolates (F-52, F-53, and F-56) on adults of granary beetle S. granarius. Five different doses, including 1×10 3 , 1x10 5 , 1×10 7 , 1x10 8 , and 1×10 9 conidia/ml for insect dipping, had been used. The experiment was laid out in a completely randomised block design with five replications and replicated two times. Mortalities were recorded on the 1 st , 3 rd , 5 th , and seventh days of incubation. The highest mortality rate of 70% was observed at the end of the five-day incubation period with isolate F-53. Mortality increased with increase in the incubation period, and the highest mortality was observed after seven days of incubation period. Although the results indicated that isolate F-53 was effective against S. granarius and resulted in a high mortality 98% at the end of seventh day incubation period at 1×10 9 conidia/ml and followed by isolates F-52 and F-56 with 94% mortality. LC50 values confirmed that S. granarius was more susceptible to the isolate F-52 than the other two isolates F-53 and F-56 where the LC50's were 1x10 5 , 2x10 5 , and 5x10 5 conidia/ml respectively. Mycosis was observed in all the treatments except the control. Our study indicates that all the isolates could be used as potential biological control agents. Further studies are ongoing for determination of the efficacy of this isolate under storage conditions.
Ondokuz Mayıs Üniversitesi Ziraat Fakültesi Dergisi (. Anadolu Tarım Bilimleri Dergisi), Mar 1, 2005
Zile ve Almus)'nde elmalarda görülen akar türleri tespit edilmiştir. Surveyler sonucunda dört alt... more Zile ve Almus)'nde elmalarda görülen akar türleri tespit edilmiştir. Surveyler sonucunda dört alt takıma ait yirmi akar türü belirlenmiştir. Bunlardan Tetranychidae familyasından beş, Eriophyidae familyasından iki, Tarsonemidae familyasından bir ve Tenuipalpidae familyasından bir tür olmak üzere toplam dokuz zararlı akar türü belirlenmiştir. Gamasida alt takımından Phytoseiidae familyasına ait yedi, Actinedida alt takımının Stigmaeidae familyasına ait bir tür saptanmıştır. Diğer familyalardan Tydeidae familyasına ait iki, Acaridae familyasına ait ise bir tür tespit edilmiştir. Tetranychidae familyası türleri, Tetranychus urticae Koch, Tetranychus vienensis Zacher, Panonychu ulmi (Koch), Bryobia rubrioculus (Scheuten), Eotetranychus uncatus Garman olup, E. uncatus Türkiye için yeni türdür.
Pakistan Journal of Zoology, 2012
Eotetranychus uncatus Garman (Acari: Tetranychidae) was found in unsprayed and abandoned orchards... more Eotetranychus uncatus Garman (Acari: Tetranychidae) was found in unsprayed and abandoned orchards in Turkey. It has the capability to become an important pest of deciduous fruit trees. In this study life-history parameters of E. uncatus Garman was studied at 25±1°C and 16:8 L:D photoperiod and 65±5% relative humidity on the apple leaf discs under controlled conditions. While the mean generation time of female (from egg to adult stage) was 13.65 days, it was 11.82 days for male. Pre-oviposition period of female was 2.95 days and total number of eggs laid per female was 26.30.
TABAD, Tarım Bilimleri Araştırma Dergisi, 2012
Turkish Journal of Agriculture: Food Science and Technology, Dec 14, 2020
Objective of this study is to determine plant protection problems which wheat growers encountered... more Objective of this study is to determine plant protection problems which wheat growers encountered and their knowledge on plant protection in Sivas province. This study is carried out in the Central, Hafik, Ulas and Yıldızeli districts of Sivas province with 220 farmers. The problems which related to plant diseases, pests and weeds in wheat growers faced were also determined. Almost all farmers (99.09%) apply chemical control. Farmers decides the pesticide applications in their wheat growing areas according to own experience (84.09%), manufacturers recommendations (24.09%), the advice of agricultural experts (17.27%) and the advice of neighbours and friends (9.55%). Farmers mostly have been applying pesticides based on their own experiences. In recent years, pesticides are being used widely against diseases, pests and weeds. Some times over dose application of pesticides by farmers in judiciously resulted in environmental pollution, health problems. Also the natural enemies will be affected. Furthermore, in weed control farmers use herbicides against broad leaved weeds. It was determined that the farmers do not have knowledge about narrow leaved weeds and herbicides use against these weed species is limited. According to the results of this survey, it will be beneficial to provide training on plant protection to wheat producers in the region.
International Journal of Agricultural and Natural Sciences, Feb 1, 2015
DergiPark (Istanbul University), Dec 15, 2018
Bu çalışma, Antalya'nın Serik ilçesinde modern örtüaltı yetiştiriciliği yapılan sera işletmelerin... more Bu çalışma, Antalya'nın Serik ilçesinde modern örtüaltı yetiştiriciliği yapılan sera işletmelerinde yürütülmüştür. Örtü altı yetiştiriciliği yapan üreticilerin, üretim sorunları, bu sorunlara yönelik çözüm üretme sürecindeki bilgi düzeyleri ile ürünlerdeki hastalık ve zararlılarla mücadele yöntemleri incelenmiştir. Araştırma Serik ilçesi ve ilçeye bağlı 10 köyde bulunan toplam 100 örtü altı yetiştiriciliği yapan işletmelerde yüz yüze yapılan anketlerden elde edilen bilgilere dayanmaktadır. Ayrıca, çalışmada Antalya ilinde örtü altı sebze üretiminde öne çıkan domates, biber, patlıcan ve hıyar ürünlerinde sorun olan hastalık ve zararlılar ile mücadele yöntemleri hakkında bilgiler sunulmuştur. Araştırma bulgularından bazılarına göre, üreticilerin dörtte biri entegre mücadele yöntemlerinden yararlandıklarını belirtirken dörtte üçü ise kimyasal mücadele yaptıklarını ifade etmişlerdir. Diğer yandan üreticilerin, kimyasal mücadele uygulamalarındaki güvenlik önlemleri ve çevreye etkileri konusunda çoğunlukla bilinçsiz oldukları belirlenmiştir.
DergiPark (Istanbul University), Nov 20, 2005
Survey was conducted to determine Apple mosaic virüs (ApMV) and it's distribution in Tokat provin... more Survey was conducted to determine Apple mosaic virüs (ApMV) and it's distribution in Tokat province. Total of 116 plant samples were collected from twenty four orchards in Central, Pazar, Turhal and Artova districts of Tokat in 2001. ApMV was revealed by DAS-ELISA in 6.9 % of the leaf samples. The virus vas detected in 15.09 % of the apple plants at two orchards located in Fidanlık and Geyraz sites of Central district. Infected cultivar was only Granny Smith.
Gaziosmanpaşa Üniversitesi Ziraat Fakültesi Dergisi, 2008
... Journal of the Acarological Society of Japan, 11(1): 1-10 Goldsmith, J., 2004. The Tomato Rus... more ... Journal of the Acarological Society of Japan, 11(1): 1-10 Goldsmith, J., 2004. The Tomato Russet Mite: Aculops lycopersici (Massee). Entomology Circular Ministry of Aggriculture and Lands Boulles Research Station. Page 5. ...
Phytoparasitica, Oct 1, 2008
The species composition and seasonal cycle ofTetranychus urticae Koch (two-spotted spider mite) a... more The species composition and seasonal cycle ofTetranychus urticae Koch (two-spotted spider mite) andEotetranychus uncatus Garman (garman spider mite; the two species were evaluated together),Amphitetranychus viennensis (Zacher) (hawthom red spider nite),Panonychus ulni (Koch) (European red mite),Bryobia rubrioculus (Scheuten) (brown mite) (Acari Tetranychidae),Cenopalpus pulcher Can and Fanz. (flat scarlet mite) (Tenuipalpidae) and their natural enemies (Phytoseiidae and Stigmaeidae family members) were compared
African Journal of Biotechnology, Apr 11, 2011
A foliar application of soluble silicon (liquid potassium silicate) was tested for the control of... more A foliar application of soluble silicon (liquid potassium silicate) was tested for the control of powdery mildew of tomato for 2 years in the field conditions on susceptible cultivar Alida F1. Powdery mildew in field-grown staked tomato, caused by Leveillula taurica was significantly controlled by a foliar spray of either K 2 SiO 3 or Bayleton + sulfur. Potassium silicate applied on a 12 day schedule was highly protective against natural infection by the mildew fungus in the field conditions. The disease severity indexes (DSI) were 77.5 and 74.7% in control plots in 2006 and 2007, respectively, and were significantly different (P < 0.05) from those in the K 2 SiO 3 plots with 5.8 and 4.6% in 2006 and 2007, respectively. Potassium silicate concentration (1 g/1 L water) used in the present study were not phytotoxic to plant foliage. The inhibitory effectiveness of potassium silicate makes it a useful biocompatible fungicide and possibly ideal foliar fertilizer for disease control in the field.
Plant Pathology Journal, Dec 15, 2005
Journal of the Agricultural Faculty of Gaziosmanpaşa University, 2018
Applied Ecology and Environmental Research, 2019
Metaseiulus (=Galendromus or Typhlodromus) occidentalis (Nesbitt) (Acari: Phytoseiidae) is an imp... more Metaseiulus (=Galendromus or Typhlodromus) occidentalis (Nesbitt) (Acari: Phytoseiidae) is an important and effective predator of pest mites in agricultural crops and is commercially available in the United States. Azadirachtin is a biorational pesticide, which contains azadirachtin A (10 g/l) as the basic active compound. The active compound has several properties useful for insect control (repellency, feeding and oviposition deterrence) and is considered safe for the environment. With the use of natural compound like azadirachtin A in integrated pest management programs, it is important to know whether the compounds have any side effects on predatory mite such as M. occidentalis. Therefore, the current study aimed to examine the toxic effect of different doses (0.1 ml (NZ-1*2), 0.05 ml (NZ-1), 0.025 ml (NZ-2), 0.01 ml (NZ-3), 0.005 ml (NZ-4) and 0.001 (NZ-5)/ 10 ml water) of NeemAzal-T/S (a.i. 10 g/l azadirachtin A) on M. occidentalis. The mortality rate of M. occidentalis was 77.5% 24 h after application of NeemAzal-T/S at 0.1 ml/10 ml water dose. The mortality caused by the recommended dose (0.05 ml/10 ml water) of NeemAzal-T/S was 62.31%, 70% and 73.07%, 24, 48 and 72 h after application, respectively. It is concluded that NeemAzal-T/S is moderately toxic against the predatory mite M. occidentalis. Therefore, the use of NeemAzal-T/S to control the pest mites in agricultural crops might affect the populations of predatory mites.
Experimental and Applied Acarology, Oct 21, 2020
This study uses an image-processing technique to determine the damage level caused by two-spotted... more This study uses an image-processing technique to determine the damage level caused by two-spotted spider mite (Tetranychus urticae Koch) to cucumber plants and changes in the number of mites in a greenhouse. Firstly, a new agricultural platform was developed to ensure camera stability for capturing quality images. The images of 50 leaves infested with T. urticae were captured weekly for 5 weeks with the platform, which resulted in 250 images. Fifty of these captured images were randomly selected and processed with an image-processing algorithm developed using an image processing toolbox module of MATLAB. The results obtained from the image processing algorithm were compared with expert observations. The image-processing method predicted the damage with 3.91 root mean squared error (RMSE). A highly significant positive relationship was found between image processing and expert observations. The results indicate that this new image-processing method may be successfully used in place of expert observation to determine T. urticae damage in greenhouses.
South African Journal of Science and Technology, Dec 19, 2013
Methanol extracts of nine plant species were evaluated for their ovicidal activity against the tw... more Methanol extracts of nine plant species were evaluated for their ovicidal activity against the two-spotted spider mite Tetranychus urticae Koch in a bioassay under laboratory conditions. These plants and plant parts used in the study were Xanthium strumarium L. (fruits and leaves), Anthemis vulgaris L. (flowers and leaves), Humulus lupulus L. (flower buds), Chenopodium album L. (flowers and leaves), Melia azedarach L. (fruits), Eucalyptus camaldulensis Dehn (flower buds and leaves), Solanum nigrum L. (flowers, leaves and fruits), Styrax officinalis L. (seed coats, seeds) and Lolium perenne L. (flowers and leaves). The greatest mortality was caused by E. camaldulensis leaf extract (63.26%), followed by X. strumarium fruit (59.64%), X. strumarium leaf (57.45%), S. nigrum fruit (51.57%), A. vulgaris flower (46.80%) and S. officinalis seed extract (44.25%). Lolium perenne extract (flowers, leaves) caused the least mortality (24.40%). Azadirachtin at 10 g/l concentration was used as a chemical standard and caused 10.09% mortality. Our results show that some of these plant extracts have a potential for ovicidal activity on two-spotted spider mite eggs and are worth further investigation.
Agriculture and Forestry, Mar 30, 2019
The granary weevil Sitophilus granarius L. is one of the most damaging grains pest in many parts ... more The granary weevil Sitophilus granarius L. is one of the most damaging grains pest in many parts of the World and Turkey. Chemical insecticides have been widely employed for the control of stored grain pests. This has caused such problems as insecticide resistance along with contamination of foodstuffs with chemical residues. Thus, there is a growing interest in using pathogenic control agents as an alternative. This study aimed to evaluate the efficacy of entomopathogenic fungus Beauveria bassiana isolates (F-52, F-53, and F-56) on adults of granary beetle S. granarius. Five different doses, including 1×10 3 , 1x10 5 , 1×10 7 , 1x10 8 , and 1×10 9 conidia/ml for insect dipping, had been used. The experiment was laid out in a completely randomised block design with five replications and replicated two times. Mortalities were recorded on the 1 st , 3 rd , 5 th , and seventh days of incubation. The highest mortality rate of 70% was observed at the end of the five-day incubation period with isolate F-53. Mortality increased with increase in the incubation period, and the highest mortality was observed after seven days of incubation period. Although the results indicated that isolate F-53 was effective against S. granarius and resulted in a high mortality 98% at the end of seventh day incubation period at 1×10 9 conidia/ml and followed by isolates F-52 and F-56 with 94% mortality. LC50 values confirmed that S. granarius was more susceptible to the isolate F-52 than the other two isolates F-53 and F-56 where the LC50's were 1x10 5 , 2x10 5 , and 5x10 5 conidia/ml respectively. Mycosis was observed in all the treatments except the control. Our study indicates that all the isolates could be used as potential biological control agents. Further studies are ongoing for determination of the efficacy of this isolate under storage conditions.