为了减轻稻瘟病为害损失，减少农药用量、残留、环境污染和防治成本，确保水稻和粮食生产、稻谷质量与贸易和农业生态环境安全。多年来，通过采用系统监测、定期调查、田间普查、品种抗稻瘟性鉴定、稻瘟病菌生理小种监测、试验示范和气象资料分析等方法，开展了南充市水稻稻瘟病综合防控技术研究。结果表明，生产用品种稻瘟病感病程度越高，大田偏重发生至重发生的概率越大，反之，则越小。3~5年更换一次具有不同抗源的主推品种，搞好品种布局，实现多抗源品种集团当家，能有效降低稻瘟病的流行程度。首次探明了杂糯间栽对稻瘟病的控制效果，搞好病稻草处理和播栽前越冬菌源处理，实施健身栽培，采取药剂浸种、药剂浸秧带药移栽等，可推迟、减轻稻瘟病发生为害。探明了稻瘟病防治时期和次数，尤其是偏重至大发生年颈瘟必须在破口至抽穗初期和齐穗期预防2次，否则，将造成严重损失。探明了75%三环唑（丰登）预防颈瘟的效果和适宜用量，4%春雷霉素、20%三环唑和1000亿个/g枯草芽孢杆菌对叶瘟和颈瘟的防治效果和差异显著性，2% 8亿个/g井冈·蜡芽菌、41%春雷·稻瘟灵3种处理和化学农药75%三环唑（对照药剂1）与40%稻瘟灵（对照药剂2）预防颈瘟的效果及评价。搞好防治示范片和应急防控，可以显著提高防治效果，并带动大面积防控落实。1997年以来，全市水稻稻瘟病中偏重至大发生频率达50.0%，通过应用综合防控技术措施，稻瘟病得到有效控制，其实际损失率均控制在2%以下，共计少用农药4523 t，2014年有44129.1 hm2水稻基地、32.7万t稻谷获得无公害、绿色和有机农产品认证，经济、社会和生态效益显著。

The study aims to reduce blast damage and the use of pesticides residue, environment pollution and control costs, and to make a significant contribution to ensuring rice and grain production, grain quality and trade and agricultural ecological environment safety. Over these years, by the methods of systematical monitoring, regular surveys, field investigation, rice blast resistance identification, physiological sampling inspection of morbidity plant, experiment and meteorological data analysis, the study on comprehensive prevention and control technology of rice blast in Nanchong city was carried out. The results showed that the higher the degree of rice blast disease sensitivity, the heavier occurrence of the disease would be. Replacing the main varieties resistance sources each 3-5 years and a well-planned variety distribution would make multi resistance source be the group head which can effectively reduce the prevalence of rice blast. In the study we firstly discovered that rice variety mixture was good for preventing the rice blast. The measures such as straw treatment, overwintering pathogen source treatment before planting, health cultivation, soaking seed with medicine and planting with medicine can reduce the occurrence of rice blast. It was necessary to find out the prevention time and number of rice blast, especially in heavy occur year the prevention should be carried twice in the early break to heading time, otherwise, it would cause serious loss. The effect and appropriate dosage of 75% Tricyclazole (Fengdeng) was proved, and the prevention effect and significant difference of 4% kasugamycin, 20% Tricyclazole and 100 billion/g of Bacillus subtilis to leaf blast and neck blast were also proved. Meanwhile, the effect and evaluation of 2%·800 million/g Jinggangmycin- wax bud bacteria, 41% kasugamycin- isoprothiolane with 3 treatments, 5% Tricyclazole (contrast medicament1) and 40% isoprothiolane (contrast medicament2) to prevent neck blast were found out. Effective prevention and emergency prevention and control could significantly improve the control effect, and put the large area control into practice. Since 1997, the frequency of heavy occurrence reached to 50.0% in Nanchong city. Through the measures of comprehensive prevention and control technology, the rice blast was effectively controlled and the actual loss rate was controlled below 2% which reduced the application of pesticide of 4523 t in total. In 2014, 327000 t rice and 44129.1 hm2 of rice base gained pollution- free, green and organic agricultural products certification. The economic, social and ecological benefit was obvious.