Epidemiology of Horseradish Root Discoloration Caused by Verticillium Dahliae
Khan, Adalat
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https://hdl.handle.net/2142/85048
Description
Title
Epidemiology of Horseradish Root Discoloration Caused by Verticillium Dahliae
Author(s)
Khan, Adalat
Issue Date
1997
Doctoral Committee Chair(s)
Eastburn, Darin M.
Department of Study
Crop Sciences
Discipline
Crop Sciences
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Biology, Microbiology
Language
eng
Abstract
Studies conducted in soil naturally infested with Verticillium dahliae revealed that initial infections of horseradish roots occured shortly after planting and probably continued throughout the season. Verticillium dahliae was first isolated from feeder roots one month after planting. Discoloration symptoms were observed two months after planting and disease incidence and severity reached a maximum in August. Greenhouse studies indicated that V. dahliae was able to penetrate both injured and non-injured roots. Under field conditions V. dahliae was first isolated from the feeder roots, indicating that most infections probably occur through the feeder roots.
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