Peanut stripe virus transmission frequency in Tainan 9 seed from different sources
1989
Sopone Wongkaew | Sumitra Kantrong (Khon Kaen Univ., Khon Kaen (Thailand). Faculty of Agriculture)
Seed transmission frequencies of peanut stripe virus in Tainan 9 groundnuts produced from different sources were investigated using the antigen direct coating-indirect ELISA in parallel with the direct observation of seedling symptoms of the indexed seeds Results of the two methods were almost identical in which seeds that gave positive reaction with ELISA almost always germinated into diseased plants. The highest number of virus infected seeds (12.50-16.50 %) were found among the seeds collected from the Seed Multiplication Center whereas those produced by farmers gave the lowest transmission frequency (3.00-3.25 %. Seeds collected from the manually inoculated plants gave 8.50 % transmission frequency. The higher number of PStV harboured seeds might be the primary course for a higher disease incidence always detected in the research stations or in fields of the contracted farmers. However, more seed samples from a larger number of the Seed Multiplication Centers and farmers should be examined before such a generalization could be made.
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