INCIDENCE OF CARNATION DOWNY MILDEW IN THE SAVANNA OF BOGOTA
In 1984 there were 96 carnation enterprises in the savanna of Bogotá producing cut flowers for the international market, with an area of 730 ha cultivated, representing 98% of the cultivated area in the country. The study included visits to 72 carnation enterprises in different production stages, from mother plant material to 24 months old plants which is the usual cropping period. Visits to evaluate fungus behavior were realized between October 1983 and March 1987. Results were significant, in 13 of the visited enterprises where downy mildew was present. The most susceptible varieties were Alice and Redalice with fungi spots on the leaf area and the stem; the rest of varieties: Rodeo, Hellas, Tango bambi, Peterson, Pallas, Yellow dusty, Improved white and Rayo de sole were affected only in the leaf area. As general conclusion was observed a progressive increase of the fungus population within the cultivated area of export carnation. It was recommended to be aware of the fungus since other fungi presented initial mild attack and became a serious problem later. To control the disease it requires a proper management of temperature and relative humidity inside greenhouse, besides periodical Mancozeb and Maneb sprays.
Quintero, H. G. (1992). INCIDENCE OF CARNATION DOWNY MILDEW IN THE SAVANNA OF BOGOTA. Acta Hortic. 307, 241-246
Cuttings, varieties, fungus disease, carnation enterprises and production stage