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Huanglong first citrus disease in China's Guangdong Province, the Chaoshan area that has been 100 years of history. In the early 1940s, Chen Bao of the Chaoshan area of the distribution of citrus Huanglong, hazards and pathogens carried out a detailed survey and study, the pathogen that caused the disease to toxic factor. 50 to 60 years, Professor Lin Kongxiang through a lot of tests, confirmed that the disease is a citrus Huanglong can be transmitted through grafting of the disease, the first time that the citrus Huanglong disease is a contagious disease at that time under the inference that the level of awareness The pathogenic virus. 1979, Ko-such as through the electron microscope and found that thick outer membrane of bacteria Huanglong (20-30 nm), and uneven thickness, that should belong to the pathogenic type of Rickettsia's (Rickettsia-like Organisms, as RLO) And then was officially named the category of bacteria (BLO). Zhao Xue, and other sources (1979) through pilot confirmed citrus Psylla (Diaphorina citri) Huanglong disease can spread through the Huanglong survey found that the prevalence of regional and citrus Psylla the distribution of general consensus. 1987, Qi-Ming Zhou first proposed the citrus Psylla in Guangxi in the south to the northern Guangxi migration issues. China's summing up decades of citrus Huanglong disease prevention and treatment of experience: strict enforcement of the protection of plant quarantine ward and no important new area of the means of establishing disease-free nursery, nurturing seedlings are disease-free citrus Huanglong disease prevention foundation in the ward in time Psylla of citrus, complete Wachubingzhu, strengthen cultivation and management is to prevent disease and Huanglong popular key measures.可以吗? |
