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INFESTACIóN E INCIDENCIA DE BROCA, ROYA Y MANCHA DE HIERRO EN CULTIVO DE CAFé DEL DEPARTAMENTO DEL CAUCA

Keywords: plant diseases, pests, epidemiology.

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Abstract:

the epidemiological study was carried out on three colombian coffee production limiting pests, i.e. coffee borer (hypothenemus hampei ferrari), coffee rust (hemileia vastatrix) and iron spot disease (cercospora coffeicola) of four municipalities of the cauca department. eight sensoring localities were selected and sampled monthly in order to obtain the infestation and incidence of each pest during 2006 and 2007(from march and december). sampling was done according to the process established by cenicafé, 30 coffee shrubs were taken for the coffee borer and the iron spot disease evaluation, and 10 for coffee rust evaluation per hectare respectively, the corresponding infestation and incidence percentages were obtained by grain and leaves counting. temperature, precipitation, relative humidity and solar bright data were obtained from neighboring climatological stations, in order to relate the pests behavior with climate. the plagues infestation and incidence in most cases exceeded the 5% economical damage threshold; the mean incidence and infestation during the evaluation period was 14,7% for rust, 4,7% for coffee borer and 4,8% on iron spot disease. the temperature and precipitation variables were the ones which exhibited closer relationship with the plagues epidemiological dynamics. high temperatures are related to high coffee borer and rust incidence, mainly between june and september, contrary to the iron spot disease, which was related to high precipitations, mainly between march and may. the results give en alert concerning plagues presence on the regional crops.

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