At four weeks after sowing, the plants of the control plot were impaired as a consequence of the highest
percentage of seedlings infected (Table 3). The plants from E+CL coated seeds were less infected than those
from the CO. CA treatment completely inhibited seedlings infection. At twelfth weeks after sowing, pre-harvesting
grain infection was significantly higher in the CO plot than in the plots with the other treatments. The results
demonstrated that the percentage of infected grains was significantly different between grains from CA treatment
plot and E+CL polymer plot.
The influence of seed coating substances on yield and yield components of rice grain are presented in
Table 4. The results demonstrated that in both seasons 2006 and 2007 the influence of seed coating substances
did not affect the number of panicles per area. These results were none significantly different. The seed coating
substances influenced the number of bearing kernels per panicle. Especially, CO and CA treatment showed the
lowest number of bearing kernels per panicle. However, higher numbers of panicle were recorded from plants
raised from CL and E+CL. The seed coating substances affected also the 1,000 seeds weight. Table 4 indicated
that the variant with E+ CL had the highest 1,000 seeds weight and the seeds obtained from the control plot had
the lowest 1,000 seed weight. The studied seed treatment variants had no influence on the grain yield. However,
compared to CA treatment, the use of biological seed coating substance treatments showed a tendency in both
seasons to increase the yield.
Table 3: The effect of seed coating substances on seedlings and rice grain infection in season 2006 and 2007*