Academic literature on the topic 'Powdery mildew disease: Plant diseases; Fungi'
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Journal articles on the topic "Powdery mildew disease: Plant diseases; Fungi"
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Wilson, Iain W., Céline L. Schiff, Douglas E. Hughes, and Shauna C. Somerville. "Quantitative Trait Loci Analysis of Powdery Mildew Disease Resistance in the Arabidopsis thaliana Accession Kashmir-1." Genetics 158, no. 3 (July 1, 2001): 1301–9. http://dx.doi.org/10.1093/genetics/158.3.1301.
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Abstract Powdery mildew diseases are economically important diseases, caused by obligate biotrophic fungi of the Erysiphales. To understand the complex inheritance of resistance to the powdery mildew disease in the model plant Arabidopsis thaliana, quantitative trait loci analysis was performed using a set of recombinant inbred lines derived from a cross between the resistant accession Kashmir-1 and the susceptible accession Columbia glabrous1. We identified and mapped three independent powdery mildew quantitative disease resistance loci, which act additively to confer disease resistance. The locus with the strongest effect on resistance was mapped to a 500-kbp interval on chromosome III.
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Holcomb, G. E. "First Report of Powdery Mildew Caused by an Oidium sp. on Torenia fournieri." Plant Disease 83, no. 9 (September 1999): 878. http://dx.doi.org/10.1094/pdis.1999.83.9.878b.
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Torenia fournieri Lind. ex Fourn. (wishbone flower, bluewings) is a popular summer bedding plant in Louisiana. Clown Mixture cultivars are available in garden centers in March and April. Transplants of cultivar Clown Rose were purchased, transplanted to larger pots, and maintained in a greenhouse. A powdery mildew was observed on these plants in March and all plants (six) were severely diseased by May. Symptoms included leaf distortion and yellowing. Powdery mildew was not present on transplants and none was found in later checks of garden centers. An Oidium sp. was observed sporulating on both leaf surfaces of infected plants. Conidia were ellipsoid, produced in chains, lacked fibrosin bodies, and averaged 41 × 22 μm in dimensions. No sexual stage was observed. Healthy plants of Clown Mixture cultivars were obtained and inoculated by brushing conidia from infected plant leaves to leaves of healthy plants. Plants were maintained in a greenhouse where temperatures ranged from 16 to 26°C. Hyphal growth appeared on inoculated plants after 5 days and the reproductive structures formed later appeared the same as those on originally infected plants. Uninoculated plants remained healthy. No previous reports of powdery mildew diseases of T. fournieri in the United States were found. Other powdery mildew pathogens reported on T. fournieri are Sphaerotheca fuliginea (Schlechtend.:Fr.) Pollacci in Finland and Japan and an Erysiphe sp. in Japan (1). Reference: (1) K. Amano. Host Range and Geographical Distribution of the Powdery Mildew Fungi. Japan Scientific Press, Tokyo, 1986.
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Sholberg, P. L., J. H. Ginns, and T. S. C. Li. "First Report of Powdery Mildew, Caused by Erysiphe cichoracearum, on Coneflowers." Plant Disease 83, no. 7 (July 1999): 694. http://dx.doi.org/10.1094/pdis.1999.83.7.694b.
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Purple coneflowers (Echinacea purpurea) are grown in North America and Europe for their medicinal properties and as ornamental plants. In September 1997 and again in 1998, a previously undescribed disease was noticed on fully grown coneflower plants in Summerland and Oliver, British Columbia. Mycelia were observed on stems, foliage, and flowers, and distinct dark red to black, round (approximately 5 mm in diameter) lesions were observed on the flower petals. The disease appeared similar to powdery mildews that have been reported on numerous genera of the Asteraceae. Samples of the diseased tissue were examined and the salient features of the fungus on two specimens were determined: cleistothecia infrequent, subglobose or flattened on the side next to the leaf surface, 121 to 209 μm in diameter; epidermal (surface) cells 20 μm in diameter; appendages hyphoid, 5 μm in diameter, up to 200 μm long; asci, 10 to 19 in each cleistothecium, broadly ellipsoid, 47 to 85 × 28 to 37 μm with a short stalk, about 8 to 13 μm long and 8 μm in diameter; ascospores, immature, two per ascus, ellipsoid to broadly ellipsoid, 17 to 25 × 11 to 13 μm, thin walled, hyaline, and smooth; conidia oblong with sides slightly convex and apices truncate, 27 to 40 × 14 to 20 μm, walls hyaline, thin, smooth. Based on the occurrence of asci that contained two ascospores and the hyphoid appendages on the cleistothecia we concluded that the fungus was Erysiphe cichoracearum DC. Damage due to this disease was minimal in 1997 and 1998 because it developed very late in the growing season and occurred sporadically within the plantings. In order to complete Koch's postulates, Echinacea purpurea plants grown in the greenhouse were inoculated with a conidial suspension (105 to 106 conidia per ml) from field-infected plants. Powdery mildew first appeared 3 months later, eventually infecting leaves and stems of 12 of 49 inoculated plants. It was distinctly white and in discrete patches on leaves, compared with coalescing dark brown areas on the stems. Microscopic examination of the conidia confirmed that they were E. cichoracearum. Although powdery mildew caused by E. cichoracearum has been widely reported on lettuce, safflower, and other cultivated and wild Compositae, we found no reference to it on Echinacea spp. in Canada (1,2), the U.S. (3), or elsewhere in the world (4). The specimens have been deposited in the National Mycological Herbarium of Canada (DAOM) with accession numbers 225933 and 225934 for Oliver and Summerland, B.C., respectively. References: (1) U. Braun. Beih. Nova Hedwigia 89:1, 1987. (2) I. L. Conners. 1967. An annotated index of plant diseases in Canada and fungi recorded on plants in Alaska, Canada, and Greenland. Canada Dept. of Agric. Pub. 1251. (3) D. F. Farr et al. 1989. Fungi on Plants and Plant Products in the United States. American Phytopathological Society, St. Paul, MN. (4) J. Ginns. 1986. Compendium of plant disease and decay fungi in Canada, 1960-1980. Agriculture Canada Pub. 1813.
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Mmbaga, Margaret T., Lucas M. Mackasmiel, and Frank A. Mrema. "Evaluation of Biological Agents for Control of Macrophomina Root Rot and Powdery Mildew in Flowering Dogwood (Cornus florida L.)." HortScience 53, no. 10 (October 2018): 1461–66. http://dx.doi.org/10.21273/hortsci13071-18.
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Six biological control agents (BCAs) (two bacteria, two fungi, and two yeasts) that were previously shown to be effective against powdery mildew (Erysiphe pulchra) were tested for efficacy against Macrophomina phaseolina root rot on flowering dogwood (Cornus florida) in the greenhouse. Two of the bacterial isolates, Stenotrophomonas sp. (B17A) and Serratia sp. (B17B), were effective in controlling both macrophomina root rot and powdery mildew, similar to fungicide control thiophanate methyl, when roots were drenched with the six BCAs individually. In addition, the two bacterial BCAs improved plant growth with respect to stem diameter, stem length, dry weight, and green foliage compared with fungicide-treated plants or nontreated controls grown in sterile soil. These results confirm previous results in which B17A and B17B suppressed powdery mildew and also promoted plant growth in flowering dogwood. Although macrophomina root rot has been previously reported as a potential problem in flowering dogwood, especially in field conditions, simultaneous infection with macrophomina root rot and powdery mildew has not been previously reported. This study confirmed that M. phaseolina infection was characterized by stubby roots and black root lesions, and plants infected with both powdery mildew and macrophomina root rot had smaller root mass compared with fungicide-treated plants. Neither of the two pathogens killed their host plants, but compounded infections significantly reduced the plant root system and plant growth. The efficacy of the two bacterial isolates in controlling both powdery mildew and macrophomina root rot suggests their potential utilization in controlling both diseases in dogwood nursery production and in other plants that are hosts to both powdery mildew and macrophomina root rot. Plant growth promoted by the two BCAs may be attributed to powdery mildew and macrophomina root rot control, but comparisons between fungicide-treated plants and control plants not inoculated with BCAs or root rot pathogen suggested that the two BCAs may play a role as bio-stimulants in growth enhancement. These results also suggest that the two biocontrol agents are not phytotoxic to dogwood.
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Reis, Ailton, Leonardo Silva Boiteux, and Milton Luiz Paz-Lima. "Powdery mildew of ornamental species caused by Oidiopsis haplophylli in Brazil." Summa Phytopathologica 33, no. 4 (December 2007): 405–8. http://dx.doi.org/10.1590/s0100-54052007000400015.
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Oidiopsis haplophylli (syn. Oidiopsis sicula) was identified as the causal agent of powdery mildew diseases occurring on five ornamental species in Brazil. This disease was observed in plastic house-grown lisianthus (Eustoma grandiflorum: Gentianaceae), in nasturtium (Tropaeolum majus: Tropaeolaceae) cultivated under open field conditions and in greenhouse-grown calla lily (Zantedeschia aethiopica: Araceae), impatiens (Impatiens balsamina: Balsaminaceae) and balloon plant (Asclepias physocarpa: Asclepiadaceae). Typical disease symptoms consisted of chlorotic areas on the upper leaf surface corresponding to a fungal colony in the abaxial surface. With the disease progression, these chlorotic areas eventually turned to necrotic (brown) lesions. Fungi morphology on all hosts was similar to that described for the imperfect stage of Leveillula taurica (O. haplophylli). The Koch's postulates were fulfilled by inoculating symptom-free plants via leaf-to-leaf contact with fungal colonies. Additional inoculations using an isolate of O. haplophylli from sweet pepper (Capsicum annuum) demonstrated that it is pathogenic to all five species belonging to distinct botanical families, indicating lack of host specialization. This is the first formal report of a powdery mildew disease on lisianthus, calla lilly, impatiens and nasturtium in Brazil. It is, to our knowledge, the first report of O. haplophyllii infecting A. physocarpa, extending the host range of this atypical powdery mildew-inducing fungus. This disease might become important on these ornamental crops especially in protected cultivation and also under field conditions in hot and dry areas of Brazil.
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Garibaldi, A., A. Minuto, D. Bertetti, and M. L. Gullino. "First Report of Powdery Mildew Caused by Oidium Subgenus Pseudoidium on Salvia scabra in Italy." Plant Disease 88, no. 6 (June 2004): 682. http://dx.doi.org/10.1094/pdis.2004.88.6.682c.
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Salvia scabra Thunb. is grown and used on the Italian Riviera as a potted plant and used in gardens. During the spring of 2003, severe outbreaks of a previously unknown powdery mildew were observed in a collection of Salvia spp. maintained at an experimental station at Albenga (northern Italy). Powdery mildew was observed only on S. scabra. Leaves were covered with white exophytic mycelia on both surfaces. As the disease progressed, infected leaves turned yellow and died. Conidia were single, hyaline, cylindric, and measured 21.3 to 35.5 × 12.5 to 22.5 μm (average 28.2 × 18.4 μm). Observations made with a light microscope revealed that foot cells were cylindric and appressoria lobed. Cleistothecia were not observed. The pathogen was identified as Oidium subgenus Pseudoidium (1,2), and pathogenicity was confirmed by gently pressing diseased leaves onto mature leaves of healthy, 40-day-old S. scabra plants. Five plants of S. scabra were used as replicates. Noninoculated plants served as controls. Inoculated and noninoculated plants were maintained in a growth chamber at 20°C. After 5 days, typical symptoms of powdery mildew developed on inoculated plants. Noninoculated plants did not show symptoms. To our knowledge, this is the first report of the presence of powdery mildew on S. scabra in Italy as well as in the world. Erysiphe polygoni DC. (Oidium subgenus Pseudoidium) and E. cichoracearum DC. (Oidium subgen us Reticuloidium) were previously reported as causal agents of powdery mildew on other species of Salvia (S. officinalis and S. sclarea) (3,4). Specimens of this disease are available at the DIVAPRA Collection at the University of Torino. References: (1) R. Belanger et al., eds. The Powdery Mildew A Comprehensive Treatise. The American Phytopathological Society, St Paul, MN, 2002. (2) U. Braun. Nova Hedwigia. 89:700, 1987. (3) D. F. Farr et al. Fungi on Plants and Plant Products in the United States. The American Phytopathological Society, St Paul, MN, 1989. (4) A. Pisi and M. G. Bellardi. Inf. Fitopatol. 48(10):57, 1998.
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Genaev, Mikhail A., Ekaterina S. Skolotneva, Elena I. Gultyaeva, Elena A. Orlova, Nina P. Bechtold, and Dmitry A. Afonnikov. "Image-Based Wheat Fungi Diseases Identification by Deep Learning." Plants 10, no. 8 (July 21, 2021): 1500. http://dx.doi.org/10.3390/plants10081500.
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Diseases of cereals caused by pathogenic fungi can significantly reduce crop yields. Many cultures are exposed to them. The disease is difficult to control on a large scale; thus, one of the relevant approaches is the crop field monitoring, which helps to identify the disease at an early stage and take measures to prevent its spread. One of the effective control methods is disease identification based on the analysis of digital images, with the possibility of obtaining them in field conditions, using mobile devices. In this work, we propose a method for the recognition of five fungal diseases of wheat shoots (leaf rust, stem rust, yellow rust, powdery mildew, and septoria), both separately and in case of multiple diseases, with the possibility of identifying the stage of plant development. A set of 2414 images of wheat fungi diseases (WFD2020) was generated, for which expert labeling was performed by the type of disease. More than 80% of the images in the dataset correspond to single disease labels (including seedlings), more than 12% are represented by healthy plants, and 6% of the images labeled are represented by multiple diseases. In the process of creating this set, a method was applied to reduce the degeneracy of the training data based on the image hashing algorithm. The disease-recognition algorithm is based on the convolutional neural network with the EfficientNet architecture. The best accuracy (0.942) was shown by a network with a training strategy based on augmentation and transfer of image styles. The recognition method was implemented as a bot on the Telegram platform, which allows users to assess plants by lesions in the field conditions.
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Bondarenko-Borisova, I. V., and T. S. Bulgakov. "Study of infectious diseases of ornamental plants of Asteraceae family in outdoor planting collections of the Donetsk Botanical Garden." Plant Biology and Horticulture: theory, innovation, no. 155 (November 16, 2020): 24–33. http://dx.doi.org/10.36305/2712-7788-2020-2-155-24-33.
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The need for regular phytopathological monitoring of collections in the Donetsk Botanical Garden is due to the risk of invasions of new plant pathogens on introduced ornamental plants under conditions phytopathogens in the 21st century, as well as the annual replenishment of the collections with new plant species, varieties, cultivars. A phytopathological examination ornamental plants collections of Asteraceae family was carried out in 2016-2019, according to which 15 genera, 19 species and 3 cultivated hybrids of plants showed various diseases caused by plant pathogenic organisms. Microfungi (30 species) predominates among the plant pathogens; plant damage caused by viral and bacterial diseases was also observed. The most common infectious diseases in the Donetsk Botanical Garden (DBG) were caused by powdery mildew fungi (recorded on 8 plant species) and rust fungi (on 5 plant species). There were found some new plant pathogenic microfungi in DBG, which were previously not recorded in the DBG and which can be treated as alien species to the region: powdery mildews of Symphyotrichum spp. (pathogen - Golovinomyces asterum ), Coreopsis spp. ( G. spadicaeus ) and Helianthus tuberosus ( G. latisporus ), rusts of Tanacetum balsamitae ( Puccinia balsamitae ) and Symphyotrichum spp. ( Coleosporium asterum ), and smut of Gaillaridia spp. ( Entyloma gaillardianum ). Various leaf spots were regularly noted in the collections, but they did not cause significant damage of Asteraceae plants in outdoor planting conditions. The most harmful types of diseases were wilting caused by Fusarium oxysporum and Verticillium albo-atrum , and rots of rhizomes and tubers of perennials such as chrysanthemums ( Chrysanthemum × hortorum ) and dahlias ( Dahlia × cultorum ) caused by Berkeleyomyces basicola , Ilyonectria destructans , Sclerotinia sclerotiorum and opportunistic pathogens Clonostachys rosea and Stachybotrys chartarum .
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Li, Chunjie, Xingxu Zhang, L. I. Author, Zhibiao Nan, and C. L. Schardl. "Disease and pest resistance of endophyte infected and non-infected drunken horse grass." NZGA: Research and Practice Series 13 (January 1, 2007): 111–14. http://dx.doi.org/10.33584/rps.13.2006.3099.
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The naturally occurring mutualistic symbiosis of Neotyphodium gansuense and drunken horse grass (Achnatherum inebrians) was studied previously in China. In this paper, new data on the interactions of endophyte, host and pathogenic fungi, mite and insect pests are presented. Fungal diseases and pests were examined when test plants were grown in pots in a climate chamber or in the field. There were usually no significant (P>0.05) differences in the levels of powdery mildew infection (caused by Blumeria graminis) under climate chamber conditions; the only exception was that E+ plants had significantly less powdery mildew infection at 50% soil water holding capacity (WHC) than at 30% WHC. There was no significant difference (P
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Sumartini, Sumartini, and Mudji Rahayu. "PENYAKIT EMBUN TEPUNG DAN CARA PENGENDALIANNYA PADA TANAMAN KEDELAI DAN KACANG HIJAU." Jurnal Penelitian dan Pengembangan Pertanian 36, no. 2 (December 28, 2017): 59. http://dx.doi.org/10.21082/jp3.v36n2.2017.p59-66.
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<p>Powdery mildew disease is caused by Erysiphae diffusa (Cook and Peck) fungi on soybeans and E. polygoni (DC Sawada) on mungbean. Both diseases are an important disease because of their widely spread and high yield loss, reaching 35% in soybeans and 26% in mungbean. In Indonesia, the disease occurs in central areas of soybean production and mungbean. The spread of the disease includes Asia, the United States of America , and Brazil. The symptoms of powdery mildew are easily recognizable in the presence of white flour on the top surface of the leaves. The intensity of powdery mildew is usually high in the dry season, when the temperature is cold in the morning and much mildew conditions around the plant. This situation will interfere with the process of photosynthesis and transpiration. In addition, Erysiphe’s haustorium absorbs plant nutrients that will interfere with some metabolic functions and processes. Control of powdery mildew will suppress the loss of grain bean and results nationally supports the availability of soybean and mungbean. Recommended control measures are spraying with plant materials (extracts of neem seeds, tea compost, cow´s whole milk, essential oil of citronella, lemongrass, eucalyptus, cinnamon, and tea tree) on the incidence of powdery mildew disease on soybean and the use of Vima1 varieties for control of powdery mildew disease on mungbean.</p><p>Keywords: Soybean, mungbean, powdery mildew, control</p><p> </p><p>Abstrak</p><p>Penyakit embun tepung disebabkan oleh cendawan Erysiphae diffusa (Cook and Peck) pada tanaman kedelai dan E. polygoni (DC Sawada) pada kacang hijau. Penyebaran penyakit penting ini menyebabkan kehilangan hasil mencapai 35% pada kedelai dan 26% pada kacang hijau. Di Indonesia, penyakit ini terjadi di sentra produksi kedelai dan kacang hijau. Di luar negeri, penyebaran penyakit embun tepung meliputi Asia, Amerika Serikat, dan Brazil. Intensitas penyakit biasanya tinggi pada musim kemarau, pada saat suhu dingin di pagi hari dan kondisi berembun di sekitar pertanaman. Gejala penyakit embun tepung mudah dikenali dengan ciri seperti tepung di permukaan atas daun. Hal ini dapat mengganggu proses fotosintesis dan transpirasi. Selain itu, haustorium Erysiphe menyerap nutrisi tanaman sehingga mengganggu beberapa fungsi dan proses metabolisme. Penyakit embun tepung perlu dikendalikan untuk menekan kehilangan hasil kedelai dan kacang hijau. Cara pengendalian yang disarankan adalah penyemprotan dengan bahan nabati (ekstrak biji mimba, kompos teh, susu sapi, minyak dari citronella, lemongrass, eucalyptus, cinnamon, dan tanaman teh) pada kedelai dan penggunaan varietas tahan Vima-1 pada kacang hijau.</p><p>Kata Kunci: Kedelai, kacang hijau, penyakit embun tepung, pengendalian</p><p> </p>
Dissertations / Theses on the topic "Powdery mildew disease: Plant diseases; Fungi"
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Pryce-Jones, Emily. "Erysiphe graminis f. sp. hordei and the role of extracellular cellulases in pathogenicity." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389410.
Full textBooks on the topic "Powdery mildew disease: Plant diseases; Fungi"
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Gołębniak, Barbara. Wybrane zagadnienia z biologii i epidemiologii mączniaka prawdziwego zbóż i traw (Erysiphe graminis DC). Poznań: Wydawn. Akademii Rolniczej w Poznaniu, 1993.
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S, Wolfe M., Limpert E. 1948-, Fischbeck G, Commission of the European Communities. Coordination of Agricultural Research., and CEC Workshop on Integrated Control to Reduce the Damage Caused by Cereal Mildews (1986 : Weihenstephan, Freising, Germany), eds. Integrated control of cereal mildews: Monitoring the pathogen : proceedings of a seminar in the Community Programme of Coordinated Research on Energy in Agriculture held in Freising-Weihenstephan, Federal Republic of Germany, 4-6 November 1986. Dordrecht: Martinus Nijhoff for the Commission of the European Communities, 1987.
Find full textBook chapters on the topic "Powdery mildew disease: Plant diseases; Fungi"
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Aist, James R., and William R. Bushnell. "Invasion of Plants by Powdery Mildew Fungi, and Cellular Mechanisms of Resistance." In The Fungal Spore and Disease Initiation in Plants and Animals, 321–45. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4899-2635-7_15.
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Kumar, Ritesh, Shikha Pathak, Nishant Prakash, Upasna Priya, and Abhijeet Ghatak. "Application of Spectroscopic Techniques in Early Detection of Fungal Plant Pathogens." In Diagnostics of Plant Diseases. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97535.
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Among the plant pathogens, around 85% of diseases in plants are caused by fungi. Rapid and accurate detection of fungal phytopathogens up to the species level is crucial for the implementation of proper disease control strategies, which were previously relied on conventional approaches. The conventional identification methods have been replaced by many rapid and accurate methods like high throughput sequencing, real-time polymerase chain reaction (PCR), serological and spectroscopic technique. Among these rapid pathogen detection techniques, spectroscopy is a rapid, cost-effective, non-destructive method and does not require sample preparation. Nowadays, visible, infrared and near-infrared rays are commonly employed for pathogen detection. Fluorescence Spectroscopy, Nuclear Magnetic Resonance (NMR) spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, Attenuated Total Reflection (ATR)-FTIR spectroscopy, Raman Spectroscopy, Matrix-assisted Laser Desorption Ionization Time-Of-Flight Mass Spectrometry (MALDI-TOF MS). Biocontrol fungus-like Trichoderma spp. can be detected with the help of MALDI-TOF MS. Fluorescence spectroscopy used fluorescence emanating from the sample and successfully used in the detection of powdery mildew (Blumeria graminis). Hyperspectral imaging is an advanced approach which uses artificial intelligence in plant disease detection. This literature discusses briefly about the features of above-mentioned spectroscopy techniques which may impel the general understanding and propel the research activities.
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Lin, Fenfang, Dongyan Zhang, Xin-Gen Zhou, and Yu Lei. "Spectroscopy Technology: An Innovative Tool for Diagnosis and Monitoring of Wheat Diseases." In Diagnostics of Plant Diseases. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96369.
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Diseases are among the most important factors limiting worldwide production of wheat. Accurate detection of diseases is the key to develop effective management strategies for control of these diseases. Spectroscopy-based technology can be a non-destructive, quick, efficient tool to accurately detect and monitor the occurrence and development of crop diseases. There has seen an increased interest in the research and application of spectrum technology for the diagnosis and detection of wheat diseases in recent years. This book chapter provides a brief review on research advances in using spectroscopy techniques to detect wheat diseases, with a focus on the diagnosis and detection of Fusarium head blight, powdery mildew, and stripe rust, three important fungal diseases in wheat worldwide. Disease symptoms and traditional disease detection methods are also included. Both literature and our original research data are presented, with the section of conclusion and prospects at the end of this book chapter.
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Zhang, F., R. Ghaffari, D. Iliescu, E. Hines, M. Leeson, and R. Napier. "Field Asymmetric Ion Mobility Spectrometry Based Plant Disease Detection." In Applied Signal and Image Processing, 102–14. IGI Global, 2011. http://dx.doi.org/10.4018/978-1-60960-477-6.ch006.
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This chapter presents the initial studies on the detection of two common diseases and pests, the powdery mildew and spider mites, on greenhouse tomato plants by measuring the chemical volatiles emitted from the tomato plants as the disease develops using a Field Asymmetric Ion Mobility Spectrometry (FAIMS) device. The processing on the collected FAIMS measurements using PCA shows that clear increment patterns can be observed on all the experimental plants representing the gradual development of the diseases. Optimisation on the number of dispersion voltages to be used in the FAIMS device shows that reducing the number of dispersion voltages by a factor up to 10, preserves the key development patterns perfectly, though the amplitudes of the new patterns are reduced significantly.