商洛桔梗种植区地下害虫发生规律研究

A Study of Occurrence Regularity of Underground Pests in Platycodon Grandiflorum Growing Areas in Shangluo

由于商洛桔梗的连作方式以及种植面积的不断扩大,金龟子、拟地甲、地老虎等多种地下害虫的为害也逐年加重,为了研究商洛桔梗种植区地下害虫发生规律,采用对角线等距随机采样调查法于2007-2009年在商州区桔梗种植区进行调查研究。结果显示:桔梗种植园地下害虫主要种类为网目拟地甲、华北大黑鳃金龟子、黑绒金龟子和苹毛金龟子;各主要害虫年发生量有一定的变化,但均维持在一个比较高的水平上。桔梗种植区地下害虫的防治应以播前防治为主,才能控制桔梗地下害虫的发生量和危害程度。

With the expansion of the planting of Platycodon grandiflorum,aggravates of the scarab and so on many kinds of underground harmful insects damages have caused great,In order to study the regularity of Platycodon grandiflorum planting area done by underground harmful insect,the diagonal line equalspace stochastic sampling survey procedure is used to conduct the investigation and study from 20072009 in business state area Platycodon grandiflorum planting area.Result：The root of balloon flower plantation underground harmful insect mainly include Mud-crusting beetle,North china Gill-blackscarab,Black-fine hair Scarab and Apple-hair scarab;Each has the quantity to have certain change in a year,and maintains in a quite high level.Platycodon grandiflorum planting area with underground harmful insect＇s preventing and controlling should be done before seeding,can control Platycodon grandiflorum underground harmful insect＇s occurrence quantity and the harm degree.