Saperda populnea is one of the most injurious insects of Aspen seedling in Peking. It has one generation a year. The adult emerged in mid-April and oviposited at the beginning of May. The females at most laid 57 eggs each. The newly hatched larvae fed on the cambium and xylem of the seedlings and caused the plants to produce galls, in which the matured larvae overwintered. Spraying the adults or the newly hatched larvae with a 25% emulsion of DDT in 200 parts of water or with a 10% emulsion of BHC at a dilution of 1:200 gave excellent control. It was also very effective to kill the eggs on the seedlings with a needle or to cut the gall beared branches off the trees in winter or early spring in the plantations.

Fresh cuttings from the dressing of pine branches possess high oil content. 10-gm retort analysis showed that 16—20% yields of oil were possible. Carbonizing them on an internal heating pile, the authors obtained high yields of tar oil from the fresh branches of Xua-Shan-Sung (华山松, Pinus Armandi) and this primary tar oil was then distilled and refined in the usual way to give kerosene, lighi,diesel oil, belt felt and other products for evaluation purposes. A description of the facilities and procedure of carbonization as well as the simple means of separation and refining of various products together with a proposed preliminary refining project of this tar oil which was the outcome of this investigation were given. Since it is rather easy to handle this “carbonization in pile” and the equipments required are obtainable readily everywhere, this method would be a proper way to utilize the otherwise wasted material of the forestry industry for the production of liquid fuel and chemical raw materials.