An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia
A survey of weeds and weeding practices was carried out by a team of agricultural economists and agronomists on 283 farms in 5 cassava-growing regions of Colombia at 3 times during a cropping season. From 71-78 percent of the weed species present were broad- leaved species. As cassava grew older, gr...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
1977
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/88321 |
| _version_ | 1855529776543956992 |
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| author | Doll, J. Pinstrup-Andersen, Per Díaz, R.O. |
| author_browse | Doll, J. Díaz, R.O. Pinstrup-Andersen, Per |
| author_facet | Doll, J. Pinstrup-Andersen, Per Díaz, R.O. |
| author_sort | Doll, J. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | A survey of weeds and weeding practices was carried out by a team of agricultural economists and agronomists on 283 farms in 5 cassava-growing regions of Colombia at 3 times during a cropping season. From 71-78 percent of the weed species present were broad- leaved species. As cassava grew older, grass species were present to a greater extent and sedge species to a lesser relative frequency. Surprisingly, Pteridium aquilinum was the most frequently listed species, in addition to Bidens pilosa and Cyperus rotundus. Regional variations in the most frequently encountered species were found, but several of the weeds were common to many zones. The most frequently encountered species did not usually have the highest plant populations. Most of the annual grasses, sedges and broad-leaved weeds found can be controlled by currently recommended herbicides for cassava, but further research is needed on Imperata cylindrica, Melinis minutiflora, P. aquilinum and Sida spp. The av no. of manual weedings was 3.3/crop, occupying 48 man-days/ha, which represents 50 percent of the total labor requirements for cassava production and more than 1/3 of the totalcosts. Reasons for not using herbicides were (1) relative costs of herbicides and labor, (2) lack of information, (3) lack of capital, (4) right herbicides were not available in small packages. This survey has identified new field problems and has suggested further research programs to solve them. (AS) |
| format | Journal Article |
| id | CGSpace88321 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1977 |
| publishDateRange | 1977 |
| publishDateSort | 1977 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace883212025-10-10T16:24:34Z An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia Doll, J. Pinstrup-Andersen, Per Díaz, R.O. costs labour manihot esculenta weeding weeds cultivation development economics manihot pests starch crops A survey of weeds and weeding practices was carried out by a team of agricultural economists and agronomists on 283 farms in 5 cassava-growing regions of Colombia at 3 times during a cropping season. From 71-78 percent of the weed species present were broad- leaved species. As cassava grew older, grass species were present to a greater extent and sedge species to a lesser relative frequency. Surprisingly, Pteridium aquilinum was the most frequently listed species, in addition to Bidens pilosa and Cyperus rotundus. Regional variations in the most frequently encountered species were found, but several of the weeds were common to many zones. The most frequently encountered species did not usually have the highest plant populations. Most of the annual grasses, sedges and broad-leaved weeds found can be controlled by currently recommended herbicides for cassava, but further research is needed on Imperata cylindrica, Melinis minutiflora, P. aquilinum and Sida spp. The av no. of manual weedings was 3.3/crop, occupying 48 man-days/ha, which represents 50 percent of the total labor requirements for cassava production and more than 1/3 of the totalcosts. Reasons for not using herbicides were (1) relative costs of herbicides and labor, (2) lack of information, (3) lack of capital, (4) right herbicides were not available in small packages. This survey has identified new field problems and has suggested further research programs to solve them. (AS) 1977-04 2017-10-12T08:02:16Z 2017-10-12T08:02:16Z Journal Article https://hdl.handle.net/10568/88321 en Limited Access Wiley DOLL, J.; PINSTRUP-ANDERSEN, P.; DIAZ, R.O. 1977. An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia. Weed Research (United Kingdom). 17:153-160. |
| spellingShingle | costs labour manihot esculenta weeding weeds cultivation development economics manihot pests starch crops Doll, J. Pinstrup-Andersen, Per Díaz, R.O. An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia |
| title | An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia |
| title_full | An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia |
| title_fullStr | An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia |
| title_full_unstemmed | An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia |
| title_short | An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia |
| title_sort | agro economic survey of the weeds and weeding practices in cassava manihot esculenta crantz in colombia |
| topic | costs labour manihot esculenta weeding weeds cultivation development economics manihot pests starch crops |
| url | https://hdl.handle.net/10568/88321 |
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