【摘要】 玉米生产对辽宁省农业发展及保障国家粮食安全具有重要作用。玉米病害一直是玉米安全生产的主要障碍，研究针对辽宁省玉米主产区病害防控需求，分别于2017、2018、2019、2024年的9月中旬（玉米成熟期）调查辽宁省玉米主要病害的发生为害情况，并分析病害发生趋势。调查结果表明：玉米大斑病和灰斑病是辽宁省玉米成熟期发生为害最为普遍和严重的两种病害，2017—2019年大斑病为害最重，2024年灰斑病为害最重；弯孢叶斑病、瘤黑粉病和茎腐病总体上发病较轻，多为局部为害病害，个别调查地点为害较重；总体上看，辽宁省玉米成熟期灰斑病和茎腐病发生为害愈发严重，弯孢叶斑病则呈现出区域性发生为害的特征。更多还原

【Abstract】 Corn production plays an important role in the agricultural development of Liaoning Province and ensuring national food security. Corn diseases have always been the main obstacle to the safe production of corn. In response to the disease prevention and control needs in the main corn production areas of Liaoning Province, this study investigated the occurrence and damage of the main corn diseases in Liaoning Province in mid-September 2017, 2018, 2019 and 2024(during the corn maturity period), and analyzed the disease occurrence trends. The investigation results show that: Corn large spot disease and gray spot disease are the two most common and serious diseases that occur and cause damage during the corn maturity period in Liaoning Province. Large spot disease caused the most damage from 2017 to2019, and gray spot disease caused the most damage in 2024; The curved-spore leaf spot disease, gall smut and stem rot disease are generally mild in occurrence, mostly local damage diseases, and the damage is relatively severe in a few investigation sites; Overall, the occurrence and damage of gray spot disease and stem rot disease during the mature period of corn in Liaoning Province have become increasingly severe, while the curved-spore leaf spot disease shows the characteristic of regional occurrence and damage.更多还原