臺灣柑桔鱗砧病分佈之調查

A Survey of Citrus Exocortis Virus in Taiwan

黃秋雄(C. S. Huang)

《中華農業研究》 24卷1&2期 (1975/09) Pp. 44-49

https://doi.org/10.29951/JARC.197509.0006

摘要

自本省二十四處柑桔園採間不同品種之接穗，包括碰柑、桶柑、柳橙及晚崙夏等四種主要栽培品種，經指示值物檢定結果，呈現典型鱗砧病病徵者計有七處，包括臺北一處、嘉義四處、臺東二處。檢定有鱗砧病的果園均爲甜橙類品種，其中一處爲甜橙和椪柑混合栽培，部份椪柑植株亦受感染。檢定十餘處椪柑果園則未發現。至於該病有否存在於椪柑果園，則有待更廣泛之調查。

並列摘要

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 orchards 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.