稻瘟病是目前危害水稻最严重的病害。据仁寿、井研、荣县、南溪、纳溪、叙永、雅安、蒲江、邛崃、名山等县市考察证实,1984年稻瘟病发生早、来势猛、危害面大,据10个地市汇报统计,造成经济损失的颈瘟面积约300万亩,预计损失稻谷5亿斤左右。蒲江县24.2万亩水稻全部发病,其中颗粒无收的3万亩,亩损失100斤的4.5万亩,亩损失50斤左右 Rice blast is the most serious disease endangering rice. According to Renshou, Jingyan, Rongxian, Nanxi, Naxi, Xuyong, Ya’an, Pujiang, Xuyi and Mingshan counties and cities, it was confirmed that in 1984 the blast occurred early and the situation was fierce. Statistics, resulting in economic losses of neck blast area of ​​about 300 mu, is expected to lose 500 million pounds of rice or so. Pujiang County, 242,000 mu of rice all the incidence, of which 300,000 mu crop failure, mu loss of 100 pounds of 4.5 million mu, mu loss of about 50 pounds