HomeInternational Rice Research Notesvol. 22 no. 2 (1997)

Effect of Crop Growth Stage and N Level on Leaf Blast Monocyclic Parameters on a New Rice Plant Type

I B. Pangga | P S. Teng | Avelino D. Raymundo

Discipline: Agriculture

 

Abstract:

We studied the effect of crop growth stage and applied N on leaf blast monocyclic parameters in two blastsusceptible cultivars, a new rice plant type line, IR64454-81-1-3-2, and with IR72 serving as the control (see table). Sporulation was converted to area under the sporulation curve (AUSC, in spores lesion - 1 d -1 ) using the equation

 

where X 1 = number of spores produced at ith observation, Ti = time (d) between observations, and n = total number of observations.