POPIAR INTRODUCTION AND SELECTION IN THE COLD SEMIARID AREA OF THE NORTH CHINA Biological Control of Batocera horsfieldi (Coleoptera: Cerambycidae)by Releasing Its Parasitoid Dastarcus helophoroides (Coleoptera: Bothrideridae) FUSARIUM PROLIFERATUM (MATSUSHIMA) NIRENBERG ——A PATHOGEN CAUSING WETWOOD IN POPLAR TREES Introduction and selection of new poplar clones in shelterbelts/windbreaks in northern Liaoning SRAP Analysis of Genetic Variation among Native Poplars in Southwest China COMPARATIVE EXPERIMENT ON ADAPTABILITY OF SEVERAL INDIGENOUS POPLARS IN INNER MONGOLIA Leave Gas Exchange Characteristics of Sprout Seedlings of Two PoplarSpecies in the Irtysh River Basin,Xinjiang Growth and Physiological Adaptability of Three Hybrid Poplars Planted in Different Saline-alkali Soil Effect of Transgenic Poplars on the Activities of Detoxification Enzymes in Micromelalopha troglodyta Larvae