|Title:||健康種苗生產技術與果樹產業||Other Titles:||Healthy seedling production technology and fruit tree industry||Authors:||張清安
|Issue Date:||Dec-2011||Publisher:||農業試驗所||Start page/Pages:||17-36||Source:||農業試驗所特刊第158號||Conference:||台灣果樹生產改進與產業策略研討會專刊||Abstract:||
Taiwan island, although situates within subtropical region, has very diversified geography and environment. In the plane region, its warm and humid environment is suitable for the cultivation of most tropical and subtropical fruit crops. While in its mountain area, which covers almost two thirds of Taiwan’s total acreage, owns highly diversified altitudes and environments and is also appropriate to grow fruit trees of temperate zone. Taking such advantages on environmental conditions, nearly all kinds of well known fruit crops have been successfully cultivated in Taiwan since 1950s. Most fruit trees need longer vegetative growing period before fruit yielding stage. This makes fruit crop cultivation more challenging especially on pest protection than other crops. Among the diseases that threaten fruit trees, those cause systemic infection and can transmit vertically from mother plants to their vegetative growing materials, such as viruses, viroids and phytoplasmas, are considered to be more dangerous and economically important. Once infected by these pathogens, most fruit trees will gradually lose their vigor and productivity and more importantly most of these diseases can not be cured by any treatment including chemotherapy. Furthermore, most of these pathogens can be transmitted efficiently and long distantly by insect vectors. These properties make cultivation of fruit trees suffering such diseases a highly challenging task. To combat against these diseases, past experience has consistently shown that the most effective control strategy is to eradicate diseased trees in the field and replanted with disease free young trees. Therefore, to establish an efficient disease free fruit tree propagation system is necessary for the implementation of control strategy on most fruit crops. Technically, in order to establish a disease free fruit tree propagation program, there are at least four parameters should be considered. 1.Techniques for screening and confirming disease free growing materials. 2.Techniques for elimination of pathogens from cultivars or clones with good horticultural traits. 3.Techniques to maintain and protect disease free growing materials from re-infection. 4.Techniques for mass reproducing disease free growing materials efficiently and economically. Besides these techniques related to the production of disease free fruit trees, actually there is another parameter should be considered once the disease free materials are available. That is how to protect the disease free materials from early re-infection when they are transplanted into the open fields. Without appropriate protection scheme those disease free young trees may re-infected quickly before maturation and lose their productivities. In this article, experience accumulated from the past two decades will be used as examples to explain the application of disease free fruit tree to control diseases caused by virus and virus-like pathogens.
|Appears in Collections:||植物病理組|
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