|Title:||臺灣柑桔鱗砧病分佈之調查||Other Titles:||A Survey of Citrus Exocortis Virus in Taiwan||Authors:||黃秋雄
|Issue Date:||6-Sep-1975||Publisher:||農業試驗所||Journal Volume:||24||Journal Issue:||1-2||Start page/Pages:||44-49||Source:||中華農業研究||Abstract:||
Citrus seedlings of the Arizona 861 selection of “Etrog” citron were selected as indicator plant for this experiment. The investigation of the occurrence and distribution of citrus exocortis virus in Taiwan has been conducted from 1971 to 1974. Twenty-four orch-ards of several varieties of citrus, namely Ponkan, Tankan, Liuchen, Valencia and other sweet orange, were selected for indexing the existence of the disease. Results indicate that exocortis virus exists in certain orchards of several areas in Taiwan. Trees from Ponkan orchards gave negative reaction.
During the course of survey, symptoms of the disease were observed in affected trees, particularly in Liuchen and Valencia varieties budded on Rangpur lime. The affected trees showed the symptoms of cracking and scaling of the bark on the rootstock below the bud union and extending to the ground level. Such trees also showed severe stunting. Buds taken from affected trees when grafted on citron seedlings, the typical symptoms of exoc-ortis were shown in leaves and twigs after 3-6 months. Thus, it confirmed that the disease existed in orchards. Up to date, there was no information from Ponkan orchards with exocortis virus.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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