Agrilus planipennis Fairmaire is an international quarantine pest. Its natural distribution area is in Northeast Asian countries, and it was discovered and caused serious damages in the United States and Canada in the early 20th century. In the 1960s, it occurred most seriously in northeast and North China, and then worsened in Tianjin, Beijing, Liaoning, Jilin and other places. It mainly damages the Fraxinus species introduced from North America, such as F. pennsylvanica Marsh, F. velutina Torr, F. americana Linn., etc. At present, the prevention and control of A. planipennis is one of the key points of forest pest control research. The sensory systems are indispensable for insect life, especially the olfaction and vision, which play a key role in the mating, oviposition, and host location of A. planipennis. This paper reviews the current research on visual and olfactory sensory mechanism, summarizes the utilization research on the vision and olfactory of A. planipennis, and lists the identification of the pheromones, plant volatiles, olfactory receptors and visual receptors of A. planipennis. This can provides a prospect for further study on the integrated mechanism of vision and olfaction of A. planipennis, in order to provide a basis for better prevention of this pest based on olfactory and visual systems.
Due to the excessive logging in the early stages, the natural forests in Northeast China were damaged to varying degrees, thus various types of secondary forests were formed. With the implementation of Natural Forest Protection Project, high-intensity commercial logging has been banned, so that most of the natural secondary forests in Northeast China have been restored to a certain content, but the whole process is slow. Understanding the succession law of secondary forest, using the ecological function of disturbance, and speeding up the succession process of the secondary forest through forest management measures has become the consensus of degraded secondary forest restoration. In this review, we introduce the ecological succession process of the main secondary forests derived from the three zonal top communities of Larix gmelinii forest, broadleaved Pinus koraiensis forest and Mountain spruce-fir forest in Northeast China, as well as the influence of interference on the succession process of secondary forests. It shows that artificial interferences may have both advantages and disadvantages on the succession of secondary forests, but most natural interferences are not conducive to the succession of secondary forests. Making good use of artificlal interferences such as logging, replanting and fire can effectively promote the succession process of secondary forests. Full cycle management of secondary forest successionandthe mechanism of natural disturbance on the succession of secondary forests in Northeast China is the focus of further research in the future.