. Suhardi. 2007. The Efficacy of Fungicide for Diseases Control, Based on Rain Fall on 2 Rose Cultivars. A trial to find out the efficacy of fungicide application after rain to control the diseases on roses was carried out at Experimental Station Segunung on September 2002 and January 2003 using a split plot design. The main factor was rose cultivar (cv. Holland and Cherry Brandy) and the subplot was fungicide application (twice a week, once a week, and after rain). The results indicated that on dry period (September 2002) both black spot and powdery mildew occurred on cv. Holland and Cherry Brandy. Both cultivars were susceptible to black spot and powdery mildew. Fungicide application after the rain occurred was effective to suppress black spot and powdery mildew only on dry periode. On rainy period (January 2003) fungicide applications after the rain occurred was not effective to suppress black spot. The efficacy of fungicide application was not only determined by rain precipitation but also on number of rainy days as well.
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