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双条杉天牛（SemanorusbifasciataMotschulsy）在第二次全国森林病虫害普查时首次在内蒙发现。在包头地区一年发生一代，以羽化成虫在树干内越冬，极少数以幼虫越冬。在包头地区主要为害杜松（Juniperusrigad）、侧柏（Platycladusorientalis）天然林及检拍（Sabinachinensis）等人工林。该虫为害直径3cm以上的树木，以树高0～2m间的树干虫口密度最高，幼虫期有3种寄生性天敌昆虫。
Sequoias cifasciata Motschulsy was first found in Inner Mongolia during the Second National Forest Disease Survey. One generation a year occurs in Baotou area, in order to feather the adults to winter in the trunk, very few to the larva overwintering. In the Baotou area, Juniperusrigad, Platycladus orientalis natural forests and Sabinachinensis were the main targets. The pests damage trees more than 3cm in diameter, tree height 0 ~ 2m tree height between the highest population density, larvae have 3 kinds of parasitic natural enemies of insects.