Spot blotch incited by Bipolaris sorokiniana is one of the most important foliar disease limiting wheat production in Nepal. A field experiment was conducted from 13 December 2017 to 12 April 2018 in the research field of National Wheat Research Program (NWRP), Padsari-1 Rupandehi, Nepal to evaluate response of 12 wheat varieties against spot blotch caused by Bipolaris sorokiniana. The experiment was laid out in Randomized complete block design (RCBD) with 12 treatments and three replications. Individual treatment plot was 2 m2 and total research field area was 152.5 m2. Disease scoring was done by double digit scoring starting from heading stage in which 4 scorings were done at 7 days interval following Zadok scale. Different traits taken for scoring were lesion size, lesion mimic, leaf tip necrosis, spike length, peduncle extrusion at different growth stages. Days to heading, days to maturity, 50 spike yield, and plot yield and test weight were recorded. The mean AUDPC was calculated and analyzed. Varieties differed significantly in mean AUDPC values. On the basis of mean AUDPC value, the varieties were categorized under four categories i.e., resistant, moderately resistant, susceptible and highly susceptible. Furthermore, the correlation of 12 varieties with AUDPC and various traits was analyzed. There was negative correlation between AUDPC and yield i.e. -0.62050. Among 12 varieties, RR-21 showed highest level of disease increment with AUDPC value 974.897 and found to be the most susceptible while least was observed in Danphe with AUDPC value 383.7 and found to be resistant. Badhganga with the AUDPC value of 396.517 was also found to be resistant to spot blotch. No varieties were found highly resistant. Similarly, Swargadwari, Gautam, NL 971, Tilottama, Aditya, Dhaulagiri and Vijaya appeared moderately resistant to spot blotch of wheat. Bhrikuti and WK 1204 were susceptible to spot blotch. Wheat grain yield varied among the varieties. Maximum yield was recorded in Danphe (5.7 t/ha) and minimum yield was recorded in RR-21 (3.5 t/ha). Similarly, highest value of test weight was recorded in Danphe (53.43 gm) and the lowest value was in Bhrikuti (34.53 gm). So, Danphe showing better performance at Bhairahawa can be taken as the source of tolerance in upcoming experiments and RR-21 can be used as susceptible check and these varieties can be suggested to incorporate into breeding program.
{"title":"Field Experiment to Evaluate the Response of Different Varieties of Wheat against Spot Blotch (Bipolaris sorokiniana) at Bhairahawa, Nepal","authors":"Anita Paneru, Bijaya Gahatraj, eep Poudel, Pratima Subedi, GC Sovana, R. Paudel","doi":"10.35248/2157-7471.20.11.525","DOIUrl":"https://doi.org/10.35248/2157-7471.20.11.525","url":null,"abstract":"Spot blotch incited by Bipolaris sorokiniana is one of the most important foliar disease limiting wheat production in Nepal. A field experiment was conducted from 13 December 2017 to 12 April 2018 in the research field of National Wheat Research Program (NWRP), Padsari-1 Rupandehi, Nepal to evaluate response of 12 wheat varieties against spot blotch caused by Bipolaris sorokiniana. The experiment was laid out in Randomized complete block design (RCBD) with 12 treatments and three replications. Individual treatment plot was 2 m2 and total research field area was 152.5 m2. Disease scoring was done by double digit scoring starting from heading stage in which 4 scorings were done at 7 days interval following Zadok scale. Different traits taken for scoring were lesion size, lesion mimic, leaf tip necrosis, spike length, peduncle extrusion at different growth stages. Days to heading, days to maturity, 50 spike yield, and plot yield and test weight were recorded. The mean AUDPC was calculated and analyzed. Varieties differed significantly in mean AUDPC values. On the basis of mean AUDPC value, the varieties were categorized under four categories i.e., resistant, moderately resistant, susceptible and highly susceptible. Furthermore, the correlation of 12 varieties with AUDPC and various traits was analyzed. There was negative correlation between AUDPC and yield i.e. -0.62050. Among 12 varieties, RR-21 showed highest level of disease increment with AUDPC value 974.897 and found to be the most susceptible while least was observed in Danphe with AUDPC value 383.7 and found to be resistant. Badhganga with the AUDPC value of 396.517 was also found to be resistant to spot blotch. No varieties were found highly resistant. Similarly, Swargadwari, Gautam, NL 971, Tilottama, Aditya, Dhaulagiri and Vijaya appeared moderately resistant to spot blotch of wheat. Bhrikuti and WK 1204 were susceptible to spot blotch. Wheat grain yield varied among the varieties. Maximum yield was recorded in Danphe (5.7 t/ha) and minimum yield was recorded in RR-21 (3.5 t/ha). Similarly, highest value of test weight was recorded in Danphe (53.43 gm) and the lowest value was in Bhrikuti (34.53 gm). So, Danphe showing better performance at Bhairahawa can be taken as the source of tolerance in upcoming experiments and RR-21 can be used as susceptible check and these varieties can be suggested to incorporate into breeding program.","PeriodicalId":16845,"journal":{"name":"Journal of Plant Pathology & Microbiology","volume":"13 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81818917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2157-7471.20.11.493
M CocaMorante
Flower production is an important economic activity in the Cochabamba Valley, Bolivia. Species and varieties of Roses (Rosa sp-), Chrysanthemums (Chrysantemum sp.), Carnations (Dianthus carophyllus), Gladiolus (Gladiolus communis), Saticias (Limonium sp.), Liliums (Liliums sp.,) etc. are grown. Rusts affect a variety of crops, including flowers. The aim of this study, was identify the rust diseases that is affecting to three important flower species. Stems and leaves of samples with characteristic rust symptoms of smallholder farmer parcels were collected between 2016 and 2018 of the Chrysantemum grandiflorum, G. communis and Limonium sp. Based on morphometric studies the causal agent of rust diseases was identify as the first record to Puccinia horiana on chrysanthemum, Uromyces transversalis on Gladiolus and Uromyces limonii on Limonio in the Cochabamba Valley, Bolivia.
{"title":"Record of rust diseases of the Chrysanthemum, Gladiolus and Limonio in the Cochabamba Valley, Bolivia","authors":"M CocaMorante","doi":"10.35248/2157-7471.20.11.493","DOIUrl":"https://doi.org/10.35248/2157-7471.20.11.493","url":null,"abstract":"Flower production is an important economic activity in the Cochabamba Valley, Bolivia. Species and varieties of Roses (Rosa sp-), Chrysanthemums (Chrysantemum sp.), Carnations (Dianthus carophyllus), Gladiolus (Gladiolus communis), Saticias (Limonium sp.), Liliums (Liliums sp.,) etc. are grown. Rusts affect a variety of crops, including flowers. The aim of this study, was identify the rust diseases that is affecting to three important flower species. Stems and leaves of samples with characteristic rust symptoms of smallholder farmer parcels were collected between 2016 and 2018 of the Chrysantemum grandiflorum, G. communis and Limonium sp. Based on morphometric studies the causal agent of rust diseases was identify as the first record to Puccinia horiana on chrysanthemum, Uromyces transversalis on Gladiolus and Uromyces limonii on Limonio in the Cochabamba Valley, Bolivia.","PeriodicalId":16845,"journal":{"name":"Journal of Plant Pathology & Microbiology","volume":"187 ","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91451288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2157-7471.20.11.504
K. Sachin, Nargund Vb, J. Shamarao
Seven different types of elite varieties were studied for loss estimation during Kharif 2010 and eight varieties during 2011. The pooled analysis over two years indicated maximum per cent loss (61.43) in VLS 63 genotype followed by TK 5 (59.83) and PK 1029 (58.07) during Kharif 2010. During Kharif 2011, maximum yield loss of 56.89 was recorded in TK 13 followed by JS 335 (49.63) and PK 1029 (48.50). The genotypes which are slow rusters such as Dsb 21 and DS 2309 recorded yield loss of 11.81 and 39.95. The most susceptible genotypes recorded yield loss of 55.63 and 53.29 percent respectively. The crop loss estimation due to rust revealed that lower disease index with increased seed yield was recorded in protected plots receiving two sprays of hexaconazole in both susceptible and resistant varieties than unprotected treatment.
{"title":"Estimation of Avoidable Loss in Elite Genotypes of Soybean due to Soybean Rust caused by Phakopsora pachyrhizi Syd","authors":"K. Sachin, Nargund Vb, J. Shamarao","doi":"10.35248/2157-7471.20.11.504","DOIUrl":"https://doi.org/10.35248/2157-7471.20.11.504","url":null,"abstract":"Seven different types of elite varieties were studied for loss estimation during Kharif 2010 and eight varieties during 2011. The pooled analysis over two years indicated maximum per cent loss (61.43) in VLS 63 genotype followed by TK 5 (59.83) and PK 1029 (58.07) during Kharif 2010. During Kharif 2011, maximum yield loss of 56.89 was recorded in TK 13 followed by JS 335 (49.63) and PK 1029 (48.50). The genotypes which are slow rusters such as Dsb 21 and DS 2309 recorded yield loss of 11.81 and 39.95. The most susceptible genotypes recorded yield loss of 55.63 and 53.29 percent respectively. The crop loss estimation due to rust revealed that lower disease index with increased seed yield was recorded in protected plots receiving two sprays of hexaconazole in both susceptible and resistant varieties than unprotected treatment.","PeriodicalId":16845,"journal":{"name":"Journal of Plant Pathology & Microbiology","volume":"61 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83999569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2157-7471.20.11.524
F. Walde
Faba bean (Vicia faba L.) is an important pulse crop produced all over the world, however, its production is reducing especially due to chocolate spots (Botrytis fabae Sard.) which is a highly dominant and damaging disease in Ethiopia. The objective of this review is; to point out the opportunities and challenges of disease epidemics and the resistance potential of faba bean crops in Ethiopia. This disease, causing a yield reduction up to 34 to 67% varies on the tolerances and the susceptibility of the cultivar as well as environmental variables. Its occurrence differs among districts, years, growth stages, agronomic practices, and climatic conditions. Under favorable conditions, chocolate spot disease increases as the plant's growth stage and the quantity as well as the potential of inoculum transported to the crop canopy and the time of arrival of inoculum related to the stage of the crop development and weather condition. The main selection criterion and epidemiological components of resistance are infection efficiency, the extent of symptoms, and the latent period. Some efforts have been made to integrate host plant resistance, epidemiological knowledge, chemical and cultural practices to manage the disease.
{"title":"Epidemiology of Chocolate Spot (Botrytis fabae sard.) and Faba Bean (Vicia faba l.) Resistance Potential for Disease Control in Ethiopia: A Review","authors":"F. Walde","doi":"10.35248/2157-7471.20.11.524","DOIUrl":"https://doi.org/10.35248/2157-7471.20.11.524","url":null,"abstract":"Faba bean (Vicia faba L.) is an important pulse crop produced all over the world, however, its production is reducing especially due to chocolate spots (Botrytis fabae Sard.) which is a highly dominant and damaging disease in Ethiopia. The objective of this review is; to point out the opportunities and challenges of disease epidemics and the resistance potential of faba bean crops in Ethiopia. This disease, causing a yield reduction up to 34 to 67% varies on the tolerances and the susceptibility of the cultivar as well as environmental variables. Its occurrence differs among districts, years, growth stages, agronomic practices, and climatic conditions. Under favorable conditions, chocolate spot disease increases as the plant's growth stage and the quantity as well as the potential of inoculum transported to the crop canopy and the time of arrival of inoculum related to the stage of the crop development and weather condition. The main selection criterion and epidemiological components of resistance are infection efficiency, the extent of symptoms, and the latent period. Some efforts have been made to integrate host plant resistance, epidemiological knowledge, chemical and cultural practices to manage the disease.","PeriodicalId":16845,"journal":{"name":"Journal of Plant Pathology & Microbiology","volume":"5 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82468221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2157-7471.20.11.501
G. Eman, Taha Mb, Hegazy Taghrid
Field experiments were carried out under natural infection in the Experimental Farm of Sids Agricultural Research Station, Agriculture Research Centre, Beni-Sweif governorate in 2017 and 2018 to evaluate the efficiency of compost amended with rock phosphate, gypsum and inoculated by some bioagents (Bacillus subtilis, Trichoderma harzianum and Arbuscular mycorrhizal fungi) in controlling of powdery mildew on dill caused by Erysiphe heraclei and improving its productivity as well as soil fertility using two application methods: soil amendment and/or foliar spray. Overall, all the tested compost treatments were effective in reducing the disease incidence, severity and improve plant growth leading to a significant increase in fresh, dry weights and fruits yield, NPK uptake. Furthermore, all the tested treatments showed significant increases in the defence-related enzymes, peroxidase, polyphenol oxidase and phenols in treated plants as compared with the untreated control. However, compost treatments improve some physical and chemical properties of the soil at the end of growing seasons and increase dehydrogenase activity as a result of enhancing soil fertility.
{"title":"Impacts of Compost Application on Controlling Powdery Mildew of Dill(Anethum graveolens L.) Caused by Erysiphe heraclei and its Effect on Soil Fertilityand Productivity","authors":"G. Eman, Taha Mb, Hegazy Taghrid","doi":"10.35248/2157-7471.20.11.501","DOIUrl":"https://doi.org/10.35248/2157-7471.20.11.501","url":null,"abstract":"Field experiments were carried out under natural infection in the Experimental Farm of Sids Agricultural Research Station, Agriculture Research Centre, Beni-Sweif governorate in 2017 and 2018 to evaluate the efficiency of compost amended with rock phosphate, gypsum and inoculated by some bioagents (Bacillus subtilis, Trichoderma harzianum and Arbuscular mycorrhizal fungi) in controlling of powdery mildew on dill caused by Erysiphe heraclei and improving its productivity as well as soil fertility using two application methods: soil amendment and/or foliar spray. Overall, all the tested compost treatments were effective in reducing the disease incidence, severity and improve plant growth leading to a significant increase in fresh, dry weights and fruits yield, NPK uptake. Furthermore, all the tested treatments showed significant increases in the defence-related enzymes, peroxidase, polyphenol oxidase and phenols in treated plants as compared with the untreated control. However, compost treatments improve some physical and chemical properties of the soil at the end of growing seasons and increase dehydrogenase activity as a result of enhancing soil fertility.","PeriodicalId":16845,"journal":{"name":"Journal of Plant Pathology & Microbiology","volume":"106 1","pages":"1-20"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79323495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2157-7471.20.11.510
M. R. Arain
Bacteria (Xanthomonas campestris pv. vesicatoria) and root-knot nematode (Meloidogyne incognita) independently can damage and cause considerable damage to tomato (Solanum lycopersicum L.). In a disease complex, interrelationship of 2 or more pathogenic species can produce different symptoms on the same host plant. Generally simultaneous occurrence of these pathogens in a field can infect hosts plant at the same time. During development of a disease complex pathogens could influence and/or suppress each other, through synergism and or antagonism respectively. In this study the pathogens (Meloidogyne incognita and Xanthomonas campestris pv. vesicatoria), were used to determine how co-occurrence affects development of pathogens and disease severity, and define prerequisites for interrelation between pathogens. Root knot infection did not occur when tomato plants were inoculated with Xanthomonas campestris 1 week prior to inoculation with Meloidogyne incognita. When M. incognita was inoculated 1 week prior to X. campestris, infection by root knot nematode was highest compared to bacterial spot incidence in susceptible plants. Simultaneous inoculation of M. incognita + X. campestris caused severe gall production with moderate severity of bacterial spot disease. The reproduction of 1 pathogen can be affected by a subsequent inoculation of other pathogen. It is suggested that bacterial spot disease enhances the development of root knot disease.
{"title":"Effect of Combined Inoculation of Xanthomonas and Meloidogyne Pathogens on the Development of Tomato Root Knot Disease","authors":"M. R. Arain","doi":"10.35248/2157-7471.20.11.510","DOIUrl":"https://doi.org/10.35248/2157-7471.20.11.510","url":null,"abstract":"Bacteria (Xanthomonas campestris pv. vesicatoria) and root-knot nematode (Meloidogyne incognita) independently can damage and cause considerable damage to tomato (Solanum lycopersicum L.). In a disease complex, interrelationship of 2 or more pathogenic species can produce different symptoms on the same host plant. Generally simultaneous occurrence of these pathogens in a field can infect hosts plant at the same time. During development of a disease complex pathogens could influence and/or suppress each other, through synergism and or antagonism respectively. In this study the pathogens (Meloidogyne incognita and Xanthomonas campestris pv. vesicatoria), were used to determine how co-occurrence affects development of pathogens and disease severity, and define prerequisites for interrelation between pathogens. Root knot infection did not occur when tomato plants were inoculated with Xanthomonas campestris 1 week prior to inoculation with Meloidogyne incognita. When M. incognita was inoculated 1 week prior to X. campestris, infection by root knot nematode was highest compared to bacterial spot incidence in susceptible plants. Simultaneous inoculation of M. incognita + X. campestris caused severe gall production with moderate severity of bacterial spot disease. The reproduction of 1 pathogen can be affected by a subsequent inoculation of other pathogen. It is suggested that bacterial spot disease enhances the development of root knot disease.","PeriodicalId":16845,"journal":{"name":"Journal of Plant Pathology & Microbiology","volume":"49 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88687238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2157-7471.20.11.522
Saif Ullah, M. zaman, Liu Jiaqi, Y. Khan, Shakir Ullah, Tian Gang
The studies were carried out from July 2017 to March 2018 in Shigar valley different Union Councils. The area lies between 7444 feet to 11694 feet from Above sea level in the Alpine zone including, Niali Nallah, Laxar Nallah, Nallah, Markuja union, Marapi union, Chorkah union, Gulapur. The study sites were randomly selected based on (1) herbs or shrubs land on the field periphery, (2) open grassland and arable land associated with sparse vegetation on rocks, stones, (3) forest land and open lands associated with sparse tree vegetation catchment of river and (4) forest land and arable land associated with dunes and rocky terrain. The quadrate method was used to record of vegetation from the selected study sites. A total of 59 plants species both medicinally and economically important were recorded at four study sites of CKNP and revealed that 30 herbs followed by 14 trees, 11 kinds of grass, and 4 shrubs respectively the dominant tree species recorded from all habitat types were Juniper sexcelsa, Elaeagnus ambulate, Morus alba, Salix Wilhelmina and Populus nigra. The most common herbs recorded were Artimisa brevifolia, Tanacetum, Echinops echinatus, Capparis sponsia, Ephedra intermedia, Peganum harmala, Daucus carota, Medicago sativa, Typha lotifuliya and Astragalus rhizanthus. The dominant shrubs were Rosa webbina, Hippophae rhamnoides, Sophora Molis and Myricaria germanica. The grasses recorded in the study area were Poa Alpina, Setaria Viridis, Hetropogon contortus, Cynodon dactylon, Taraxacum oritinlis, Trifolium repens and Cascuta reflexa. These plants are also used by local communities for fuelwood and timber. This study will be beneficial for locals and governments for the protection and conservation of this indigenous flora as well as fauna in the future.
{"title":"Quantifying the Estimation and Abundance of Plant Diversity of Shigar Valley, Gilgit -Baltistan, Pakistan","authors":"Saif Ullah, M. zaman, Liu Jiaqi, Y. Khan, Shakir Ullah, Tian Gang","doi":"10.35248/2157-7471.20.11.522","DOIUrl":"https://doi.org/10.35248/2157-7471.20.11.522","url":null,"abstract":"The studies were carried out from July 2017 to March 2018 in Shigar valley different Union Councils. The area lies between 7444 feet to 11694 feet from Above sea level in the Alpine zone including, Niali Nallah, Laxar Nallah, Nallah, Markuja union, Marapi union, Chorkah union, Gulapur. The study sites were randomly selected based on (1) herbs or shrubs land on the field periphery, (2) open grassland and arable land associated with sparse vegetation on rocks, stones, (3) forest land and open lands associated with sparse tree vegetation catchment of river and (4) forest land and arable land associated with dunes and rocky terrain. The quadrate method was used to record of vegetation from the selected study sites. A total of 59 plants species both medicinally and economically important were recorded at four study sites of CKNP and revealed that 30 herbs followed by 14 trees, 11 kinds of grass, and 4 shrubs respectively the dominant tree species recorded from all habitat types were Juniper sexcelsa, Elaeagnus ambulate, Morus alba, Salix Wilhelmina and Populus nigra. The most common herbs recorded were Artimisa brevifolia, Tanacetum, Echinops echinatus, Capparis sponsia, Ephedra intermedia, Peganum harmala, Daucus carota, Medicago sativa, Typha lotifuliya and Astragalus rhizanthus. The dominant shrubs were Rosa webbina, Hippophae rhamnoides, Sophora Molis and Myricaria germanica. The grasses recorded in the study area were Poa Alpina, Setaria Viridis, Hetropogon contortus, Cynodon dactylon, Taraxacum oritinlis, Trifolium repens and Cascuta reflexa. These plants are also used by local communities for fuelwood and timber. This study will be beneficial for locals and governments for the protection and conservation of this indigenous flora as well as fauna in the future.","PeriodicalId":16845,"journal":{"name":"Journal of Plant Pathology & Microbiology","volume":"146 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86024155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2157-7471.20.11.500
Farag Mf
Tomato is one of the most important vegetable crops in the world. It is infected with several disease through the growth season, but new disease appeared as a new challenge to tomato productivity, causing pink root rot. Symptoms of pink root rot were observed on tomato (Lycopersicon esculentum Mill.) grown in Beni Sweif Governorate (Nasser, Sumosta, Beba and El-Wasta Counties) in summer 2013 as poor growth, chlorosis and then necrosis of the tip branches, by maturity. Typical symptoms on the infected root especially, epidermis were picked areas and both of cortex and vascular bundles were colored with pink along the infected tissues consistent with both those that were observed in the field. Based on morphological characteristics of the isolated fungus, disease symptoms and a pathogenicity test, Melanospora chionea was identified as the causal agent of pink root rot of tomato. Identification of this species was confirmed by sequencing of internal transcribed space (ITS region) of ribosomal RNA gene. M. chionea has not previously been reported on tomato. The host range of this disease was defined between numerous hosts belonging to Fabaceae, Malvaceae, Cucurbitaceae and Solanaceae. The aim of this work to determine and description of the disease and identification of the pathogen morphologicaly and genetically. More work is required to find appropriate methods for controlling this new disease.
{"title":"First Record of Melanospora chionea as a Possible Cause of Pink Root Rot Disease on Tomato Plants in Egypt","authors":"Farag Mf","doi":"10.35248/2157-7471.20.11.500","DOIUrl":"https://doi.org/10.35248/2157-7471.20.11.500","url":null,"abstract":"Tomato is one of the most important vegetable crops in the world. It is infected with several disease through the growth season, but new disease appeared as a new challenge to tomato productivity, causing pink root rot. Symptoms of pink root rot were observed on tomato (Lycopersicon esculentum Mill.) grown in Beni Sweif Governorate (Nasser, Sumosta, Beba and El-Wasta Counties) in summer 2013 as poor growth, chlorosis and then necrosis of the tip branches, by maturity. Typical symptoms on the infected root especially, epidermis were picked areas and both of cortex and vascular bundles were colored with pink along the infected tissues consistent with both those that were observed in the field. Based on morphological characteristics of the isolated fungus, disease symptoms and a pathogenicity test, Melanospora chionea was identified as the causal agent of pink root rot of tomato. Identification of this species was confirmed by sequencing of internal transcribed space (ITS region) of ribosomal RNA gene. M. chionea has not previously been reported on tomato. The host range of this disease was defined between numerous hosts belonging to Fabaceae, Malvaceae, Cucurbitaceae and Solanaceae. The aim of this work to determine and description of the disease and identification of the pathogen morphologicaly and genetically. More work is required to find appropriate methods for controlling this new disease.","PeriodicalId":16845,"journal":{"name":"Journal of Plant Pathology & Microbiology","volume":"37 1 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84687792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2157-7471.20.11.506
Said Mk, Taher Di
Partial resistance (PR) to bean rust (Uromyces appendiculatus) in seven bean varieties was determined through three epidemiological parameters, final rust severity (FRS %), area under disease progress curve (AUDPC) and rate of disease increase (r-value) at adult plant stage under natural infection in open field, and four components of resistance (incubation period, latent periods, infection frequency and Pustule size under artificial inoculation in greenhouse) at seedling stage under artificial inoculation in greenhouse. Resistance parameters under both field and greenhouse conditions were varied significantly among bean varieties tested in different years. Montcalm, Nebraska and Bronco were classified partially resistant varieties with decreasing the amount of rust infection and disease development, whereas Karnak, Giza 6, Paulista and Contender were exhibited fast-rusting varieties based on both open field and greenhouse experiments. The partially resistant varieties had higher amounts of three enzymes catalase (CAT), peroxidase (POX) and polyphenoloxidase (PPO) compared with fast-rusting varieties. High significant correlations (r2) were observed among resistance parameters in both field and greenhouse experiments. Correlation matrix suggests that AUDPC and LP50 were good and more reliable parameters for evaluation and selection for resistance to bean rust.
{"title":"Characterization of Partial Resistance to Bean Rust Disease caused by Uromyces appendiculatus in Seven Common bean Varieties","authors":"Said Mk, Taher Di","doi":"10.35248/2157-7471.20.11.506","DOIUrl":"https://doi.org/10.35248/2157-7471.20.11.506","url":null,"abstract":"Partial resistance (PR) to bean rust (Uromyces appendiculatus) in seven bean varieties was determined through three epidemiological parameters, final rust severity (FRS %), area under disease progress curve (AUDPC) and rate of disease increase (r-value) at adult plant stage under natural infection in open field, and four components of resistance (incubation period, latent periods, infection frequency and Pustule size under artificial inoculation in greenhouse) at seedling stage under artificial inoculation in greenhouse. Resistance parameters under both field and greenhouse conditions were varied significantly among bean varieties tested in different years. Montcalm, Nebraska and Bronco were classified partially resistant varieties with decreasing the amount of rust infection and disease development, whereas Karnak, Giza 6, Paulista and Contender were exhibited fast-rusting varieties based on both open field and greenhouse experiments. The partially resistant varieties had higher amounts of three enzymes catalase (CAT), peroxidase (POX) and polyphenoloxidase (PPO) compared with fast-rusting varieties. High significant correlations (r2) were observed among resistance parameters in both field and greenhouse experiments. Correlation matrix suggests that AUDPC and LP50 were good and more reliable parameters for evaluation and selection for resistance to bean rust.","PeriodicalId":16845,"journal":{"name":"Journal of Plant Pathology & Microbiology","volume":"20 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88603665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2157-7471.20.11.509
D. Wa, Parry Fa, K. Mm
During kharif season of years 2017 and 2018 field screening of sixteen common bean germplasm lines against angular leaf spot (ALS) under natural disease epidemic conditions could identify for resistance to angular leaf spot (ALS) in common bean have relied on a range of sources of resistance. However, due to occurrences of many different races of the pathogen, sources of resistance may not always be effective in all the regions. The present study was conducted to identify new sources of resistance to ALS. A total of sixteen new germplasm lines were evaluated for resistance. The results observed that the response germplasm lines to ALS during the two years were similar. The results further revealed that under epiphytic conditions only one germplasm viz., SR-1 exhibited resistance reaction.
{"title":"Evaluation of Common Bean Germplasm Lines for Resistance to Angular Leaf Spot (Phaeoisariopsis griseola (Scac.) Ferraris) Under High Altitude Conditions of Gurez Valley","authors":"D. Wa, Parry Fa, K. Mm","doi":"10.35248/2157-7471.20.11.509","DOIUrl":"https://doi.org/10.35248/2157-7471.20.11.509","url":null,"abstract":"During kharif season of years 2017 and 2018 field screening of sixteen common bean germplasm lines against angular leaf spot (ALS) under natural disease epidemic conditions could identify for resistance to angular leaf spot (ALS) in common bean have relied on a range of sources of resistance. However, due to occurrences of many different races of the pathogen, sources of resistance may not always be effective in all the regions. The present study was conducted to identify new sources of resistance to ALS. A total of sixteen new germplasm lines were evaluated for resistance. The results observed that the response germplasm lines to ALS during the two years were similar. The results further revealed that under epiphytic conditions only one germplasm viz., SR-1 exhibited resistance reaction.","PeriodicalId":16845,"journal":{"name":"Journal of Plant Pathology & Microbiology","volume":"58 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76828082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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