Weerakoon shyama (43 risultati)

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Paperback or Softback. Condizione: New. Natural and Induced Herbicide Resistance in Rice (Oryza Sativa L.) Varieties in Sri Lanka. Book.

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Paperback. Condizione: Brand New. 54 pages. 9.00x6.00x0.13 inches. In Stock.

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Paperback. Condizione: Brand New. 80 pages. 8.66x5.91x0.19 inches. In Stock.

Paperback. Condizione: new. Paperback. Weeds along with insect pests and plant diseases are sources of biotic stress in crop systems. Weeds are responsible for serious problems in rice worldwide affecting growth and causing a considerable reduction in quality and quantity in yield. Herbicide-resistant rice varieties in combination with pre-emergent-broad-spectrum herbicides and post-emergent broad-spectrum herbicides improve the effectiveness of weed management in rice fields. Herbicide resistance can be acquired naturally or induced by classical or modern breeding techniques. High concentration of Glyphosate, a pre-emergent-broad-spectrum systemic herbicide, is prevalently applied to control rice weeds in Sri Lanka, which intern causes severe damages to cultivated rice varieties which are susceptible to Glyphosate. However, there are rice varieties with natural Herbicide Resistance (HR). Six traditional and eighteen inbred, cultivated rice varieties (Bg, Bw, At and Ld series developed by Rice Research Development Institute, Sri Lanka) were used to screen their natural HR. As observations, time taken-to seed germination, time taking to flowering; plant height and number of leaves at 12-weeks after sawing, leaf-length, breadth, panicle-length, number of seeds/panicles of resistant plants and controls were recorded. Plants with >= 40% resistance were considered as resistant to Glyphosate. Ten inbred rice varieties (Bg250, Bg94-1, Bg304, Bg359, Bg406, Bg379-2, Bg366, Bg300, Bw364, At362) and three traditional rice varieties ("Kalu Heenati", "Sudu Heenati", "Pachchaperumal") were naturally resistant to 0.25 g L-1 Glyphosate concentration and when increased the concentration (0.5 gL-1) resistance were reduced. The post-emergent broad-spectrum herbicide, Glufosinate is also applied to control rice weeds in Sri Lanka. Two traditional varieties ("Pachchaperumal", "Ma Wee") and fifteen inbred varieties (At362, Bg250, Bg300, Bg352, Bg357, Bg358, Bg359, Bg360, Bg366, Bg369, Bg379/2, Bg403, Bg450, Bg454, and Bg94-1) were screened for their natural HR resistant to Glufosinate. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability. …

Taschenbuch. Condizione: Neu. Weedy Rice (Oryza sativa f. spontanea) | Weedy Rice (Oryza sativa f. spontanea): Origin and Distribution Patterns in Sri Lanka | Shyama Weerakoon | Taschenbuch | 80 S. | Englisch | 2018 | LAP LAMBERT Academic Publishing | EAN 9786134976404 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.…

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paperback. Condizione: New. NEW. SHIPS FROM MULTIPLE LOCATIONS. book.

Taschenbuch. Condizione: Neu. Unkraut-Reis (Oryza sativa f. spontanea) | Unkraut-Reis (Oryza sativa f. spontanea): Herkunft und Verbreitungsmuster in Sri Lanka | Shyama Weerakoon | Taschenbuch | 76 S. | Deutsch | 2022 | Verlag Unser Wissen | EAN 9786205285688 | Verantwortliche Person für die EU: SIA OmniScriptum Publishing, Brivibas Gatve 197, 1039 RIGA, LETTLAND, customerservice[at]vdm-vsg[dot]de | Anbieter: preigu.…

PAP. Condizione: New. New Book. Shipped from UK. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

PAP. Condizione: New. New Book. Delivered from our UK warehouse in 4 to 14 business days. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

Condizione: New. Print on Demand.

Condizione: New. Print on Demand.

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Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Weedy rice (Oryza sativa f. spontanea) is one of the most nuisance weeds, referred as 'red rice' possess higher morphological variability and varying degrees of similarities to wild and cultivated rice. Close similarity between weedy and cultivated rice prevents use of selective herbicides in controlling weedy rice. Weedy rice affects both quantity and quality of national rice production. Efforts were made to understand morphological and physiological properties of weedy rice and its epidemiology to design controlling methods and to disseminate information to farmers. Weedy rice is strongly characterized by seed shattering and dormancy characters. Long term sympatric distribution has led to similarities between weedy and cultivated rice through natural hybridization and introgression. Major wild rice species (O. nivara and O. rufipogon) are also distributed all over the country. The content of the book discusses levels of genetic diversity of weedy rice populations in different climatic zones in Sri Lanka through agro-morphological and molecular studies and explore the possible origin of weedy rice by comparing the genetic relationships with cultivated rice and wild rice varieties. 80 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Weeds along with insect pests and plant diseases are sources of biotic stress in crop systems. Weeds are responsible for serious problems in rice worldwide affecting growth and causing a considerable reduction in quality and quantity in yield. Herbicide-resistant rice varieties in combination with pre-emergent-broad-spectrum herbicides and post-emergent broad-spectrum herbicides improve the effectiveness of weed management in rice fields. Herbicide resistance can be acquired naturally or induced by classical or modern breeding techniques.High concentration of Glyphosate, a pre-emergent-broad-spectrum systemic herbicide, is prevalently applied to control rice weeds in Sri Lanka, which intern causes severe damages to cultivated rice varieties which are susceptible to Glyphosate. However, there are rice varieties with natural Herbicide Resistance (HR). Six traditional and eighteen inbred, cultivated rice varieties (Bg, Bw, At and Ld series developed by Rice Research Development Institute, Sri Lanka) were used to screen their natural HR. As observations, time taken-to seed germination, time taking to flowering; plant height and number of leaves at 12-weeks after sawing, leaf-length, breadth, panicle-length, number of seeds/panicles of resistant plants and controls were recorded. Plants with ¿ 40% resistance were considered as resistant to Glyphosate. Ten inbred rice varieties (Bg250, Bg94-1, Bg304, Bg359, Bg406, Bg379-2, Bg366, Bg300, Bw364, At362) and three traditional rice varieties ('Kalu Heenati', 'Sudu Heenati', 'Pachchaperumal') were naturally resistant to 0.25 g L-1 Glyphosate concentration and when increased the concentration (0.5 gL-1) resistance were reduced.The post-emergent broad-spectrum herbicide, Glufosinate is also applied to control rice weeds in Sri Lanka. Two traditional varieties ('Pachchaperumal', 'Ma Wee') and fifteen inbred varieties (At362, Bg250, Bg300, Bg352, Bg357, Bg358, Bg359, Bg360, Bg366, Bg369, Bg379/2, Bg403, Bg450, Bg454, and Bg94-1) were screened for their natural HR resistant to Glufosinate. 56 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -El arroz maleza (Oryza sativa f. spontanea) es una de las malas hierbas más molestas, denominada 'arroz rojo', que posee una mayor variabilidad morfológica y diversos grados de similitud con el arroz silvestre y el cultivado. La estrecha similitud entre el arroz maleza y el cultivado impide el uso de herbicidas selectivos para controlar el arroz maleza. El arroz maleza afecta tanto a la cantidad como a la calidad de la producción nacional de arroz. Se ha intentado comprender las propiedades morfológicas y fisiológicas del arroz maleza y su epidemiología para diseñar métodos de control y difundir información a los agricultores. El arroz maleza se caracteriza fuertemente por los caracteres de fragmentación y latencia de las semillas. La distribución simpática a largo plazo ha dado lugar a similitudes entre el arroz silvestre y el cultivado a través de la hibridación natural y la introgresión. Las principales especies de arroz silvestre (O. nivara y O. rufipogon) también están distribuidas por todo el país. El contenido del libro analiza los niveles de diversidad genética de las poblaciones de arroz de maleza en diferentes zonas climáticas de Sri Lanka mediante estudios agromorfológicos y moleculares y explora el posible origen del arroz de maleza comparando las relaciones genéticas con las variedades de arroz cultivado y de arroz silvestre.Traducción realizada con la versión gratuita del traductor 76 pp. Spanisch.…

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Weedy rice (Oryza sativa f. spontanea) is one of the most nuisance weeds, referred as 'red rice' possess higher morphological variability and varying degrees of similarities to wild and cultivated rice. Close similarity between weedy and cultivated rice prevents use of selective herbicides in controlling weedy rice. Weedy rice affects both quantity and quality of national rice production. Efforts were made to understand morphological and physiological properties of weedy rice and its epidemiology to design controlling methods and to disseminate information to farmers. Weedy rice is strongly characterized by seed shattering and dormancy characters. Long term sympatric distribution has led to similarities between weedy and cultivated rice through natural hybridization and introgression. Major wild rice species (O. nivara and O. rufipogon) are also distributed all over the country. The content of the book discusses levels of genetic diversity of weedy rice populations in different climatic zones in Sri Lanka through agro-morphological and molecular studies and explore the possible origin of weedy rice by comparing the genetic relationships with cultivated rice and wild rice varieties. …

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Weerakoon ShyamaProf. Shyama Weerakoon graduated from Uni. of Colombo, Sri Lanka following a B.Sc. Special Degree in Botany and received Ph.D. in Genetics and Plant Breeding from Uni. of Western Australia in Australia, and completed .…

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Le riz adventice (Oryza sativa f. spontanea) est l'une des mauvaises herbes les plus nuisibles, appelée 'riz rouge', qui présente une grande variabilité morphologique et des degrés variables de similarité avec le riz sauvage et le riz cultivé. L'étroite similitude entre le riz adventice et le riz cultivé empêche l'utilisation d'herbicides sélectifs pour lutter contre le riz adventice. Le riz adventice affecte à la fois la quantité et la qualité de la production nationale de riz. Des efforts ont été faits pour comprendre les propriétés morphologiques et physiologiques du riz adventice et son épidémiologie afin de concevoir des méthodes de lutte et de diffuser des informations aux agriculteurs. Le riz adventice est fortement caractérisé par l'éclatement et la dormance des graines. Une distribution sympatrique à long terme a conduit à des similitudes entre le riz adventice et le riz cultivé par le biais de l'hybridation naturelle et de l'introgression. Les principales espèces de riz sauvage (O. nivara et O. rufipogon) sont également réparties dans tout le pays. Le contenu du livre traite des niveaux de diversité génétique des populations de riz adventice dans différentes zones climatiques du Sri Lanka par le biais d'études agro-morphologiques et moléculaires et explore l'origine possible du riz adventice en comparant les relations génétiques avec le riz cultivé et les variétés de riz sauvage. 76 pp. Französisch.…

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Weeds along with insect pests and plant diseases are sources of biotic stress in crop systems. Weeds are responsible for serious problems in rice worldwide affecting growth and causing a considerable reduction in quality and quantity in yield. Herbicide-resistant rice varieties in combination with pre-emergent-broad-spectrum herbicides and post-emergent broad-spectrum herbicides improve the effectiveness of weed management in rice fields. Herbicide resistance can be acquired naturally or induced by classical or modern breeding techniques.High concentration of Glyphosate, a pre-emergent-broad-spectrum systemic herbicide, is prevalently applied to control rice weeds in Sri Lanka, which intern causes severe damages to cultivated rice varieties which are susceptible to Glyphosate. However, there are rice varieties with natural Herbicide Resistance (HR). Six traditional and eighteen inbred, cultivated rice varieties (Bg, Bw, At and Ld series developed by Rice Research Development Institute, Sri Lanka) were used to screen their natural HR. As observations, time taken-to seed germination, time taking to flowering; plant height and number of leaves at 12-weeks after sawing, leaf-length, breadth, panicle-length, number of seeds/panicles of resistant plants and controls were recorded. Plants with ¿ 40% resistance were considered as resistant to Glyphosate. Ten inbred rice varieties (Bg250, Bg94-1, Bg304, Bg359, Bg406, Bg379-2, Bg366, Bg300, Bw364, At362) and three traditional rice varieties ('Kalu Heenati', 'Sudu Heenati', 'Pachchaperumal') were naturally resistant to 0.25 g L-1 Glyphosate concentration and when increased the concentration (0.5 gL-1) resistance were reduced.The post-emergent broad-spectrum herbicide, Glufosinate is also applied to control rice weeds in Sri Lanka. Two traditional varieties ('Pachchaperumal', 'Ma Wee') and fifteen inbred varieties (At362, Bg250, Bg300, Bg352, Bg357, Bg358, Bg359, Bg360, Bg366, Bg369, Bg379/2, Bg403, Bg450, Bg454, and Bg94-1) were screened for their natural HR resistant to Glufosinate.…

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - El arroz maleza (Oryza sativa f. spontanea) es una de las malas hierbas más molestas, denominada 'arroz rojo', que posee una mayor variabilidad morfológica y diversos grados de similitud con el arroz silvestre y el cultivado. La estrecha similitud entre el arroz maleza y el cultivado impide el uso de herbicidas selectivos para controlar el arroz maleza. El arroz maleza afecta tanto a la cantidad como a la calidad de la producción nacional de arroz. Se ha intentado comprender las propiedades morfológicas y fisiológicas del arroz maleza y su epidemiología para diseñar métodos de control y difundir información a los agricultores. El arroz maleza se caracteriza fuertemente por los caracteres de fragmentación y latencia de las semillas. La distribución simpática a largo plazo ha dado lugar a similitudes entre el arroz silvestre y el cultivado a través de la hibridación natural y la introgresión. Las principales especies de arroz silvestre (O. nivara y O. rufipogon) también están distribuidas por todo el país. El contenido del libro analiza los niveles de diversidad genética de las poblaciones de arroz de maleza en diferentes zonas climáticas de Sri Lanka mediante estudios agromorfológicos y moleculares y explora el posible origen del arroz de maleza comparando las relaciones genéticas con las variedades de arroz cultivado y de arroz silvestre.Traducción realizada con la versión gratuita del traductor.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Weedy rice (Oryza sativa f. spontanea) is one of the most nuisance weeds, referred as 'red rice' possess higher morphological variability and varying degrees of similarities to wild and cultivated rice. Close similarity between weedy and cultivated rice prevents use of selective herbicides in controlling weedy rice. Weedy rice affects both quantity and quality of national rice production. Efforts were made to understand morphological and physiological properties of weedy rice and its epidemiology to design controlling methods and to disseminate information to farmers. Weedy rice is strongly characterized by seed shattering and dormancy characters. Long term sympatric distribution has led to similarities between weedy and cultivated rice through natural hybridization and introgression. Major wild rice species (O. nivara and O. rufipogon) are also distributed all over the country. The content of the book discusses levels of genetic diversity of weedy rice populations in different climatic zones in Sri Lanka through agro-morphological and molecular studies and explore the possible origin of weedy rice by comparing the genetic relationships with cultivated rice and wild rice varieties.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 80 pp. Englisch. …

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Weeds along with insect pests and plant diseases are sources of biotic stress in crop systems. Weeds are responsible for serious problems in rice worldwide affecting growth and causing a considerable reduction in quality and quantity in yield. Herbicide-resistant rice varieties in combination with pre-emergent-broad-spectrum herbicides and post-emergent broad-spectrum herbicides improve the effectiveness of weed management in rice fields. Herbicide resistance can be acquired naturally or induced by classical or modern breeding techniques.High concentration of Glyphosate, a pre-emergent-broad-spectrum systemic herbicide, is prevalently applied to control rice weeds in Sri Lanka, which intern causes severe damages to cultivated rice varieties which are susceptible to Glyphosate. However, there are rice varieties with natural Herbicide Resistance (HR). Six traditional and eighteen inbred, cultivated rice varieties (Bg, Bw, At and Ld series developed by Rice Research Development Institute, Sri Lanka) were used to screen their natural HR. As observations, time taken-to seed germination, time taking to flowering; plant height and number of leaves at 12-weeks after sawing, leaf-length, breadth, panicle-length, number of seeds/panicles of resistant plants and controls were recorded. Plants with ¿ 40% resistance were considered as resistant to Glyphosate. Ten inbred rice varieties (Bg250, Bg94-1, Bg304, Bg359, Bg406, Bg379-2, Bg366, Bg300, Bw364, At362) and three traditional rice varieties ('Kalu Heenati', 'Sudu Heenati', 'Pachchaperumal') were naturally resistant to 0.25 g L-1 Glyphosate concentration and when increased the concentration (0.5 gL-1) resistance were reduced.The post-emergent broad-spectrum herbicide, Glufosinate is also applied to control rice weeds in Sri Lanka. Two traditional varieties ('Pachchaperumal', 'Ma Wee') and fifteen inbred varieties (At362, Bg250, Bg300, Bg352, Bg357, Bg358, Bg359, Bg360, Bg366, Bg369, Bg379/2, Bg403, Bg450, Bg454, and Bg94-1) were screened for their natural HR resistant to Glufosinate.Libri GmbH, Europaallee 1, 36244 Bad Hersfeld 56 pp. Englisch.…

Taschenbuch. Condizione: Neu. Natural and Induced Herbicide Resistance in Rice (Oryza Sativa L.) Varieties in Sri Lanka | Shyama Weerakoon | Taschenbuch | Englisch | 2024 | Eliva Press | EAN 9789999316286 | Verantwortliche Person für die EU: Libri GmbH, Europaallee 1, 36244 Bad Hersfeld, gpsr[at]libri[dot]de | Anbieter: preigu Print on Demand. …