Untitled - International Rice Research Institute
Untitled - International Rice Research Institute
Untitled - International Rice Research Institute
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Fig. 46. Occurrence of minute leaf and grain spot (EPPO 1997).<br />
Detection frequency (%)<br />
120<br />
100<br />
East Asia<br />
Europe<br />
Latin America<br />
South Asia<br />
Southeast Asia<br />
Sub-Saharan Africa<br />
80<br />
60<br />
40<br />
20<br />
0<br />
Detection level (%)<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
1990 1991 1992 1993 1994 1995 1996 1997<br />
Year<br />
Fig. 47. Detection frequency (a) and level (b) of Nigrospora sp. from imported untreated seeds, 1990-97.<br />
45