Determinación del nivel de inóculo primario de Pseudomonas solanacearum en suelos con infestación natural
Several methods were tested for detecting the residual inocuhnn of Pseudomonas solanacearum, Race 1, in inceptisols at Turrialba, Costa Rica, where lire bacterium is apparently endemic Planting healthy potato tubers in soil samples in the greenhouse, then using plant wilt as indicator of the pathogen's presence, was qualitatively the most efficient method; however, it was not possible to quantify precisely the level of primary inoculum in several soils A selective culture medium containing tetrazolium chloride plus antibiotics allowed detection of P. solanacearum at concentrations near 25 000 cells/gram of dry soil, even though a large number of antagonistic bacteria predominated in many samples, completely inhibiting P. solanaccarum Both methods were used to detect P. solanacearum in samples from soils subjected for nearly four years to three systems of minimum tillage or one of tradi-tional mechanical tillage, populations were consistent), larger in mechanically-tilled soil. This was confirmed by planting potato and tomato directly in the field, where significant contrasts in percentage of bacterial wilt resulted. The decrease of the bacterium in minimum-tilled soils was attributed to an increase in organic matter and thus an increase in antagonistic microorganisms.
Main Authors: | Rodríguez, C.A, González, L.C. |
---|---|
Format: | Artículo biblioteca |
Language: | Spanish / Castilian |
Published: |
Instituto Interamericano de Cooperación para la Agricultura (IICA)
1982-10
|
Subjects: | INOCULACION, SUELO, RALSTONIA SOLANACEARUM, MALEZAS, PLANTAS INDICADORAS, BIDENS PILOSA, GALINSOGA, COSTA RICA, INOCULATION, SOIL, WEEDS, INDICATOR PLANTS, Sede Central, |
Online Access: | https://repositorio.catie.ac.cr/handle/11554/12122 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Determinación del nivel de inóculo primario de Pseudomonas solanacearum en suelos con infestación natural
by: 111945 Rodríguez, C.A., et al.
Published: ((Oct) -
Biología y preferencia alimenticia de Liriomyza sp. (Diptera: Agromyzidae) en papa, apio y cinco malezas importantes en la zona norte de Cartago
by: 113059 Romero Zúñiga, H., et al.
Published: (1991) -
Avaliação de parâmetros para o monitoramento da interferência de plantas daninhas na cultura de soja (Glycine max L.).
by: SPADOTTO, C. A., et al.
Published: (1993-08-23) -
Estudo do efeito da mistura de glyphosate e oxifluorfen no controle em pós-emergencia na arruaçao
by: 106698 Prado Filho, H.P.A., et al.
Published: (1983) -
Controle de plantas daninhas do cafeeiro pela associaçao de herbicidas pre e pós-emergentes e efeito da cobertura morta na retençao dos herbicidas
by: 100946 Oliveira, J.A., et al.
Published: (1983)