|Title:||不同生育期之水稻感染黃葉病後對農藝性狀之影響||Other Titles:||Effect of Transitory yellowing Virus on Agronomic Characters of Rice Plant Infeted at Different Ages||Authors:||謝式拌鈺
|Issue Date:||Apr-1974||Publisher:||植病保護學會||Journal Volume:||16||Journal Issue:||1-2||Start page/Pages:||35-41||Source:||植物保護學會會刊||Abstract:||
不同生育期之臺中秈二號和臺中65號接種黃葉病帶毒媒介昆蟲Nephotettix apicalis Motschulsky以測定此毒素病對水稻各種農藝性狀之影響。
Two rice varieties, Taichung sen 2 and Taichung 65, were inoculated at diferent ages with transitory yellowing virus by exposing for one day to viruliferous leafhoppers, Nephotettix aplcalis Motsch. The agronomic characters of infected plants were compared with those of healthy check plants on which virus-free leafhoppers had fed. LSD tests were performed at all comparisons.
The yield reduction due to transitory yellowing virus infection decreased with increased plant age at inoculation. No significant reduction in yield was found when plants were inoculated at 40 days of age for Taichung sen 2 or 45 days of age for Taichung 65.
The virus infected plants produced fewer spikelets and had a higher percentage of empty grains than healthy checks. The thousand grain weight of the infected plants was much less than that of healthy plants.
The infected plants produced fewer and shorter panicles than healthy plants. The plant height of the infected plants was reduced considerably. The infected plants took longer to flower than healthy checks, especially those inoculated at the early stage of growth.
Taichung sen 2 inoculated 40 days after sowing and Taichung 65 inoculated at 55 days did not show syrnpton-is before harvest. Plants inoculated at the early stage of growth had a shorter incubation period for symptoms than those plants inoculated at a later growing stage.
|Appears in Collections:||植物保護系|
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