Effects of high temperature shocks on hawthorn spider mite, Tetranychus viennensis Zacher Spatial pattern of hawthorn spider mite population and its application Ⅰ. Three-dimensional spatial pattern of adult mites in apple tree Spatial pattern of hawthorn spider mite population and its application Ⅱ.Synthetical es timation of population density or adult mites and its sampling techinique Influence of host plant species on the development and reproduction of hawthorn spider mite Tetranychus viennensis Zacher