Seed pathology

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)

Bibliographic Details

Main Authors:	Schwartz, Howard F., Morales, Francisco José
Format:	Book Chapter biblioteca
Language:	English
Published:	International Center for Tropical Agriculture 1989
Subjects:	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,
Online Access:	https://hdl.handle.net/10568/81833 http://ciat-library.ciat.cgiar.org/Articulos_Ciat/biblioteca/Bean_Production_Problems_in_the_Tropics.pdf#page=429
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