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Seed pathology [Pub: 01-01-1989]
| Content Provider | Consultative Group on International Agricultural Research (CGIAR) |
|---|---|
| Author | Schwartz, Howard F. Morales, Francisco José |
| Description | Seeds provide an efficient method for disseminating pathogenic organisms to different locations; more than 50 percent of the major bean diseases are seed borne. Mechanical damage, which may occur during harvesting, threshing and/or planting can affect seed viability, germination, and result in contamination by microorganisms. Seed pathogens can be controlled with protectant fungicides that penetrate the seed coat but not the cotyledons. Systemic fungicides, which penetrate the seed coat and cotyledons, provide some degree of control. The date of harvest is very important in the production of high-quality, pathogen-free seed. Leaving plants for prolonged periods in the field after plant maturity increases the percentage of seed infection by fungi and decreases the percentage of seed germination. Various species of bacteria and viruses are seed borne, but no treatment controls them satisfactorily. The seed-borne and seed-contaminating organisms associated with dry beans are given in table form. Color illustrations are given. (AS) La semilla constituye un metodo eficiente de diseminacion de organismos fitopatogenos a diversas localidades; mas de 50 por ciento de las principales enfermedades del frijol son transmitidas por la semilla. El dano mecanico que ocurre durante la cosecha, trilla y/o siembra tambien puede afectar la viabilidad, la germinacion y resultar en contaminacion de la semilla por microorganismos. Los patogenos de la semilla se pueden controlar con fungicidas protectores que penetran en la testa de la semilla pero no en el interior de los cotiledones. Los fungicidas sistemicos, que penetran en la testa y en los cotiledones, brindan cierto grado de control. La fecha de cosecha es muy importante en la produccion de semilla de alta calidad, libre de agentes patogenos. Dejar las plantas en el campo por periodos prolongados despues de que han madurado hace que el porcentaje de infeccion por hongos aumente y que el porcentaje de germinacion de la semilla disminuya. Varias especies de bacterias y virus son portadas por la semilla, pero ningun tratamiento las controla satisfactoriamente. Se presentan en forma de cuadro los organismos portados por las semillas y contaminantes de ellas asociados con el frijol. Se presentan ilustraciones a color. (RA) |
| Related Links | https://cgspace.cgiar.org/items/3d283a00-1ebf-40b7-8fdf-258bbd94b59d |
| File Format | |
| Language | English |
| Publisher | International Center for Tropical Agriculture |
| Publisher Date | 1989-01-01 |
| Publisher Place | Cali, Colombia |
| Access Restriction | Open |
| Subject Keyword | Phaseolus Vulgaris Seed Transmission Storage Seed Disease Control Chemical Control Colletotrichum Lindemuthianum Xanthomonas Campestris Phaseoli Corynebacterium Flaccumfaciens Bean Common Mosaic Virus Seed Production Bacterial Diseases Diseases and Pathogens Mycoses Pest Control Pests Viroses Transmision Por Semilla Almacenamiento Semillas Control De Enfermedades Control Químico Virus Del Mosaico Común Frijol Producción De Semillas Beans Pests AND Diseases Seed Systems |
| Content Type | Text |
| Resource Type | Chapter |
| Subject | Agronomy and Crop Science Food Science Plant Science |
