Blast disease was seriously damaged on the conventional plots compared to the innovation plots. Hence,
there were 26.66% of old practice plots, which were completely destroyed by neck blast at the flowering
stage. Fungicide sprayed after panicle emergence could not control neck blast damage. Meanwhile, less
blast disease, high grain yield and good milling quality were found on the innovation practice-applied plots.
Effect of fungicide sprays was also better in the plots with low seeding rate and less nitrogen fertilizers
used. Loss in grain yield due to neck blast was from 38.21% to 64.57%. Percentage of reduction of head
rice from 3.12% to 11.27% and 1,000-grain weight from 3.67% to 5.07% was due to neck blast.