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麦茎蜂（ＣｅｐｈｕｓｐｙｇｍａｅｕｓＬｉｎｎ．）是近年来在平遥县新发现的１种小麦害虫。１９９７年在卜宜乡落邑村首次发现，于１９９８年、１９９９年虫害发生面积逐渐扩大，目前分布在全县７个乡镇，发生面积约６６７ｈｍ２，虫株率一般为１０％～２０％，发生严重地块
Cephus pygmaeus Linn. Is a newly discovered wheat pest in Pingyao County in recent years. In 1997, it was first discovered in Laoyi village of Buyi Township that in 1998 and 1999, the pest occurrence area gradually expanded. It is currently distributed in 7 towns and townships of the county with an area of 667hm2 and a bug rate of 10% ~ 20% Seriously block