小麦吸浆虫(Sieudiplosis mosellanag)曾于四十年代末至五十年代初猖獗发生,造成全国小麦大面积减产。时隔30余年,该虫又在青、甘、陕、晋、豫、皖、宁等省(区)再度猖獗成灾,轻的减产三、四成,重的减产五、六成。本次发生的特点是,发展迅速,强度大;呈“岛屿”式危害;旱地也出现毁灭性的灾害。笔者一年来对其发生的成因进行了调查研究,提出来与同行讨论。 Siemis major (Sieudiplosis mosellanag) was rampant in the late 1940s and early 1950s, causing widespread wheat production in the country. After a lapse of more than 30 years, the insects once again became rampant in the provinces of Qinghai, Gansu, Shaanxi, Shanxi, Henan, Anhui and Ningxia, with a slight reduction in output by 40% to 40% and heavy losses by 50% to 60%. The occurrence of this is characterized by rapid development and great intensity; “island” -type hazards; drylands also have devastating disasters. The author conducted a survey on the causes of its occurrence in a year and proposed to discuss with her colleagues.