Biology of Shivaphis pteroceltis (Hemiptera: Aphididae), A New Pest of Pteroceltis tatarinowii Leaf Comparation on Anatomical Structure and Epidermal Characteristics of Pteroceltis tatarinowii Maxim. in Different Areas Composition of Bark Fiber of Wild Pteroceltis tatarinowii in Daguisi National Forest Park Chloroplast phylogeography of a temperate tree Pteroceltis tatarinowii (Ulmaceae) in China The genetic structure of endemic plant Pteroceltis tatarinowii by ISSR markers Effect of Soil Drying-Wetting Alternation on Physiology and Growth of Pteroceltis tatarinowii Seedlings Population structure and spatial distribution pattern of Pteroceltis tatarinowii in Langyashan Mountain of Anhui Province Spatial Pattern of Pteroceltis tatarinowii Populations in Langya Moutain of Anhui Province Ecological Characteristics of Shivaphis pteroceltis (Hemiptera: Aphididae), A New Pest on Pteroceltis tatarinowii