松材线虫病的潜伏侵染

潜伏侵染指病原物侵入植物组织后，由于寄主或环境条件的限制，暂时停止生长活动，但仍保持其生命，寄主植物不表现症状的现象。松材线虫病是世界范围内重要的松树流行性病害，也是我国目前危害最为严重的森林病害。潜伏侵染在松材线虫病的发生地广泛存在，目前因为其发生发展机制不明确，给松材线虫病的防控带来了一定的难度。此外，由于潜伏侵染的无症状携带者识别难度大，导致疫木清除过程中容易被忽视，最终会吸引媒介昆虫取食和产卵，作为侵染源引起松材线虫病扩散蔓延。因此，建议对松材线虫病潜伏侵染的发生机制、发展规律及快速识别等加强研究，推动更为有效的防控技术产出。 

Latent infection of pine wilt disease

The latent infection was defined as a state of disease without evident symptoms, in which the carrier harbors the disease agent because of the host resistance and unsuitable environment. Pine wilt disease is an important pine epidemic disease worldwide, and it is also the most serious forest disease in China. The latent infection of pine wood nematodes is prevalent in epidemic area of pine wilt disease. Until now, the mechanism of latent infection is still unclear and it brings some difficulty to prevent and control of pine wilt disease. Due to the asymptomatic carriers are easily recognized as health trees and retained during the infection tree cutting process, and attract vector insects to feed and lay eggs as a source of pathogen to cause the spread of pine wilt disease once again. Therefore, we should pay more attention on the mechanism, epidemiology, and rapidly identification of latent infection to put forward effective prevention and control strategies of pine wilt disease.