土螱属(Odontotermes)的一些种类在我国南方危害杉(Cunninghamia lanceolata (Lamb.)Hook.)、樟(Cinnamomum camphora (L.) Presl)、檫(Sassafras tzumu Hemsl.)等六十多种主要用材树种,特别是对树苗以及幼树危害更大,轻则影响幼树生长,形成“小老树”,重则植株枯死。同时,土螱属的种类可在江河堤围和山塘水库的土坝中营巢栖居,所形成的主巢腔、菌圃腔,联接主巢与菌圃、菌圃与菌圃之间的拱形隧道以及群体到背水坡、迎水坡活动所构筑的隧道均构成巨大隐患,可引起漏水,造成跌窝,甚至决堤垮坝。有的种类还可破坏房屋建筑木构件。 在我国,北纬35℃以南的江苏、上海、河南、安徽、甘肃、陕西、四川、西藏、云南、贵州、 Some species of the genus Odontotermes are found in more than 60 major timber species such as Cunninghamia lanceolata (Lamb.) Hook., Cinnamomum camphora (L.) Presl, Sassafras tzumu Hemsl. Species, especially for saplings and young trees more harmful, ranging from affecting the growth of young trees, the formation of “small old tree,” while the dead plants. At the same time, the genus of genus can nest nest in the river embankment and the earth dam of Shantang Reservoir. The main nest cavity, fungus cavity formed, the connection between the main nest and the nursery, between the nursery and the nursery Arched tunnels as well as tunnels constructed by groups to the back slope and the slope facing the water slides all pose great potential dangers and can cause water leakage, resulting in drop pits and even breakdowns in the dike. Some species can also destroy building wooden components. In our country, Jiangsu, Shanghai, Henan, Anhui, Gansu, Shaanxi, Sichuan, Tibet, Yunnan, Guizhou,