甘藷簇葉病之兔絲媒介傳染
Other Title
Transmission of Sweet Potato Witches' Broom by Dodder (Cuscuta chinensis Lam.)
Journal
中華農業研究
Journal Volume
28
Journal Issue
1
Start Page
23
End Page
28
Date Issued
1979-03-04
Date
1979-03-04
Author(s)
楊一郎
I-lang Yang
Abstract
本試驗首次證實甘藷簇葉病可經由臺灣之兔絲（Cuscuta chinensis）媒介傳染。作者在本省苗栗及南投地區採集之兔絲，經鑑定為C. chinensis Lam.。以兔絲實生苗繁殖寄生在健全長春草，為傳染媒介兔絲材料，將兔絲蔓捲接寄生在甘藷簇葉病病苗，然後將該病苗生長出之免絲蔓捲接聯結寄生在供試長春草及甘藷健苗，以該寄生兔絲蔓及其吸器，將病苗與健苗相聯接達28~37 天，結果可使該病原菌質經由此項兔絲蔓及其吸器之媒介而傳染，使供試甘藷苗罹病生長出小葉病徵，使長春草苗罹病生長出葉化花病徵。此項傳染罹病植株顯現病徵之發病潛伏期為42~110 天。
經試驗證實，臺灣之兔絲之寄主植物範圍廣泛，包括各種蔬菜、花類、雜草等範圍很廣的不同科屬植物。供試30 種植物中，以長春草、絲瓜、紅菜、馬麻藤、細花野牽牛、蠶豆等為其最適宜之寄主植物。
The results of successful transmission of sweet potato witches ' broom disease by dodder Cuscuta chinensis Lam. are reported in the present paper. The sweet potato witches’ broom could be transmitted from infected sweet potato to healthy sweet potato and periwinkle plants through the bridge formed between the inoculum and inoculated plants by the haustoria and twining stems of the parasitic plant dodder C . chinensis, the parasitic dodder connections were maintained for about 28 to 37 days , and the new growth developed from the inoculated plants showed phyllody and little leaf symptoms after incubation periods of 42 to 110 days. These experiments confirmed that the dodder C . chinensis has a wide range of host plants including several vegetable, ornamental and weed plants belonging to families widely separated taxonomically. This is the first report of a successful dodder transmission of sweet potato witches broom by C . chinensis Lam .
Publisher
農業試驗所
Type
journal article
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